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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
Project: cocalc-sagemath-dev-slelievre
Views: 418346dnl GMP specific autoconf macros
dnl Copyright 2000-2006, 2009, 2011, 2013, 2014 Free Software Foundation, Inc.
dnl
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
dnl Some tests use, or must delete, the default compiler output. The
dnl possible filenames are based on what autoconf looks for, namely
dnl
dnl a.out - normal unix style
dnl b.out - i960 systems, including gcc there
dnl a.exe - djgpp
dnl a_out.exe - OpenVMS DEC C called via GNV wrapper (gnv.sourceforge.net)
dnl conftest.exe - various DOS compilers
define(IA64_PATTERN,
[[ia64*-*-* | itanium-*-* | itanium2-*-*]])
dnl Need to be careful not to match m6811, m6812, m68hc11 and m68hc12, all
dnl of which config.sub accepts. (Though none of which are likely to work
dnl with GMP.)
dnl
define(M68K_PATTERN,
[[m68k-*-* | m68[0-9][0-9][0-9]-*-*]])
define(POWERPC64_PATTERN,
[[powerpc64-*-* | powerpc64le-*-* | powerpc620-*-* | powerpc630-*-* | powerpc970-*-* | power[3-9]-*-*]])
define(S390_PATTERN,
[[s390-*-* | z900esa-*-* | z990esa-*-* | z9esa-*-* | z10esa-*-* | z196esa-*-*]])
define(S390X_PATTERN,
[[s390x-*-* | z900-*-* | z990-*-* | z9-*-* | z10-*-* | z196-*-*]])
define(X86_PATTERN,
[[i?86*-*-* | k[5-8]*-*-* | pentium*-*-* | athlon-*-* | viac3*-*-* | geode*-*-* | atom-*-*]])
define(X86_64_PATTERN,
[[athlon64-*-* | k8-*-* | k10-*-* | bobcat-*-* | jaguar-*-* | bulldozer-*-* | piledriver-*-* | steamroller-*-* | excavator-*-* | pentium4-*-* | atom-*-* | core2-*-* | corei*-*-* | x86_64-*-* | nano-*-*]])
dnl GMP_FAT_SUFFIX(DSTVAR, DIRECTORY)
dnl ---------------------------------
dnl Emit code to set shell variable DSTVAR to the suffix for a fat binary
dnl routine from DIRECTORY. DIRECTORY can be a shell expression like $foo
dnl etc.
dnl
dnl The suffix is directory separators / or \ changed to underscores, and
dnl if there's more than one directory part, then the first is dropped.
dnl
dnl For instance,
dnl
dnl x86 -> x86
dnl x86/k6 -> k6
dnl x86/k6/mmx -> k6_mmx
define(GMP_FAT_SUFFIX,
[[$1=`echo $2 | sed -e '/\//s:^[^/]*/::' -e 's:[\\/]:_:g'`]])
dnl GMP_REMOVE_FROM_LIST(listvar,item)
dnl ----------------------------------
dnl Emit code to remove any occurrence of ITEM from $LISTVAR. ITEM can be a
dnl shell expression like $foo if desired.
define(GMP_REMOVE_FROM_LIST,
[remove_from_list_tmp=
for remove_from_list_i in $[][$1]; do
if test $remove_from_list_i = [$2]; then :;
else
remove_from_list_tmp="$remove_from_list_tmp $remove_from_list_i"
fi
done
[$1]=$remove_from_list_tmp
])
dnl GMP_STRIP_PATH(subdir)
dnl ----------------------
dnl Strip entries */subdir from $path and $fat_path.
define(GMP_STRIP_PATH,
[GMP_STRIP_PATH_VAR(path, [$1])
GMP_STRIP_PATH_VAR(fat_path, [$1])
])
define(GMP_STRIP_PATH_VAR,
[tmp_path=
for i in $[][$1]; do
case $i in
*/[$2]) ;;
*) tmp_path="$tmp_path $i" ;;
esac
done
[$1]="$tmp_path"
])
dnl GMP_INCLUDE_GMP_H
dnl -----------------
dnl Expand to the right way to #include gmp-h.in. This must be used
dnl instead of gmp.h, since that file isn't generated until the end of the
dnl configure.
dnl
dnl Dummy value for GMP_LIMB_BITS is enough
dnl for all current configure-time uses of gmp.h.
define(GMP_INCLUDE_GMP_H,
[[#define __GMP_WITHIN_CONFIGURE 1 /* ignore template stuff */
#define GMP_NAIL_BITS $GMP_NAIL_BITS
#define GMP_LIMB_BITS 123
$DEFN_LONG_LONG_LIMB
#include "$srcdir/gmp-h.in"]
])
dnl GMP_HEADER_GETVAL(NAME,FILE)
dnl ----------------------------
dnl Expand at autoconf time to the value of a "#define NAME" from the given
dnl FILE. The regexps here aren't very rugged, but are enough for gmp.
dnl /dev/null as a parameter prevents a hang if $2 is accidentally omitted.
define(GMP_HEADER_GETVAL,
[patsubst(patsubst(
esyscmd([grep "^#define $1 " $2 /dev/null 2>/dev/null]),
[^.*$1[ ]+],[]),
[[
]*$],[])])
dnl GMP_VERSION
dnl -----------
dnl The gmp version number, extracted from the #defines in gmp-h.in at
dnl autoconf time. Two digits like 3.0 if patchlevel <= 0, or three digits
dnl like 3.0.1 if patchlevel > 0.
define(GMP_VERSION,
[GMP_HEADER_GETVAL(__GNU_MP_VERSION,gmp-h.in)[]dnl
.GMP_HEADER_GETVAL(__GNU_MP_VERSION_MINOR,gmp-h.in)[]dnl
.GMP_HEADER_GETVAL(__GNU_MP_VERSION_PATCHLEVEL,gmp-h.in)])
dnl GMP_SUBST_CHECK_FUNCS(func,...)
dnl ------------------------------
dnl Setup an AC_SUBST of HAVE_FUNC_01 for each argument.
AC_DEFUN([GMP_SUBST_CHECK_FUNCS],
[m4_if([$1],,,
[_GMP_SUBST_CHECK_FUNCS(ac_cv_func_[$1],HAVE_[]m4_translit([$1],[a-z],[A-Z])_01)
GMP_SUBST_CHECK_FUNCS(m4_shift($@))])])
dnl Called: _GMP_SUBST_CHECK_FUNCS(cachevar,substvar)
AC_DEFUN([_GMP_SUBST_CHECK_FUNCS],
[case $[$1] in
yes) AC_SUBST([$2],1) ;;
no) [$2]=0 ;;
esac
])
dnl GMP_SUBST_CHECK_HEADERS(foo.h,...)
dnl ----------------------------------
dnl Setup an AC_SUBST of HAVE_FOO_H_01 for each argument.
AC_DEFUN([GMP_SUBST_CHECK_HEADERS],
[m4_if([$1],,,
[_GMP_SUBST_CHECK_HEADERS(ac_cv_header_[]m4_translit([$1],[./],[__]),
HAVE_[]m4_translit([$1],[a-z./],[A-Z__])_01)
GMP_SUBST_CHECK_HEADERS(m4_shift($@))])])
dnl Called: _GMP_SUBST_CHECK_HEADERS(cachevar,substvar)
AC_DEFUN([_GMP_SUBST_CHECK_HEADERS],
[case $[$1] in
yes) AC_SUBST([$2],1) ;;
no) [$2]=0 ;;
esac
])
dnl GMP_COMPARE_GE(A1,B1, A2,B2, ...)
dnl ---------------------------------
dnl Compare two version numbers A1.A2.etc and B1.B2.etc. Set
dnl $gmp_compare_ge to yes or no according to the result. The A parts
dnl should be variables, the B parts fixed numbers. As many parts as
dnl desired can be included. An empty string in an A part is taken to be
dnl zero, the B parts should be non-empty and non-zero.
dnl
dnl For example,
dnl
dnl GMP_COMPARE($major,10, $minor,3, $subminor,1)
dnl
dnl would test whether $major.$minor.$subminor is greater than or equal to
dnl 10.3.1.
AC_DEFUN([GMP_COMPARE_GE],
[gmp_compare_ge=no
GMP_COMPARE_GE_INTERNAL($@)
])
AC_DEFUN([GMP_COMPARE_GE_INTERNAL],
[ifelse(len([$3]),0,
[if test -n "$1" && test "$1" -ge $2; then
gmp_compare_ge=yes
fi],
[if test -n "$1"; then
if test "$1" -gt $2; then
gmp_compare_ge=yes
else
if test "$1" -eq $2; then
GMP_COMPARE_GE_INTERNAL(m4_shift(m4_shift($@)))
fi
fi
fi])
])
dnl GMP_PROG_AR
dnl -----------
dnl GMP additions to $AR.
dnl
dnl A cross-"ar" may be necessary when cross-compiling since the build
dnl system "ar" might try to interpret the object files to build a symbol
dnl table index, hence the use of AC_CHECK_TOOL.
dnl
dnl A user-selected $AR is always left unchanged. AC_CHECK_TOOL is still
dnl run to get the "checking" message printed though.
dnl
dnl If extra flags are added to AR, then ac_cv_prog_AR and
dnl ac_cv_prog_ac_ct_AR are set too, since libtool (cvs 2003-03-31 at
dnl least) will do an AC_CHECK_TOOL and that will AR from one of those two
dnl cached variables. (ac_cv_prog_AR is used if there's an ac_tool_prefix,
dnl or ac_cv_prog_ac_ct_AR is used otherwise.) FIXME: This is highly
dnl dependent on autoconf internals, perhaps it'd work to put our extra
dnl flags into AR_FLAGS instead.
dnl
dnl $AR_FLAGS is set to "cq" rather than leaving it to libtool "cru". The
dnl latter fails when libtool goes into piecewise mode and is unlucky
dnl enough to have two same-named objects in separate pieces, as happens
dnl for instance to random.o (and others) on vax-dec-ultrix4.5. Naturally
dnl a user-selected $AR_FLAGS is left unchanged.
dnl
dnl For reference, $ARFLAGS is used by automake (1.8) for its ".a" archive
dnl file rules. This doesn't get used by the piecewise linking, so we
dnl leave it at the default "cru".
dnl
dnl FIXME: Libtool 1.5.2 has its own arrangements for "cq", but that version
dnl is broken in other ways. When we can upgrade, remove the forcible
dnl AR_FLAGS=cq.
AC_DEFUN([GMP_PROG_AR],
[dnl Want to establish $AR before libtool initialization.
AC_BEFORE([$0],[AC_PROG_LIBTOOL])
gmp_user_AR=$AR
AC_CHECK_TOOL(AR, ar, ar)
if test -z "$gmp_user_AR"; then
eval arflags=\"\$ar${abi1}_flags\"
test -n "$arflags" || eval arflags=\"\$ar${abi2}_flags\"
if test -n "$arflags"; then
AC_MSG_CHECKING([for extra ar flags])
AR="$AR $arflags"
ac_cv_prog_AR="$AR $arflags"
ac_cv_prog_ac_ct_AR="$AR $arflags"
AC_MSG_RESULT([$arflags])
fi
fi
if test -z "$AR_FLAGS"; then
AR_FLAGS=cq
fi
])
dnl GMP_PROG_M4
dnl -----------
dnl Find a working m4, either in $PATH or likely locations, and setup $M4
dnl and an AC_SUBST accordingly. If $M4 is already set then it's a user
dnl choice and is accepted with no checks. GMP_PROG_M4 is like
dnl AC_PATH_PROG or AC_CHECK_PROG, but tests each m4 found to see if it's
dnl good enough.
dnl
dnl See mpn/asm-defs.m4 for details on the known bad m4s.
AC_DEFUN([GMP_PROG_M4],
[AC_ARG_VAR(M4,[m4 macro processor])
AC_CACHE_CHECK([for suitable m4],
gmp_cv_prog_m4,
[if test -n "$M4"; then
gmp_cv_prog_m4="$M4"
else
cat >conftest.m4 <<\EOF
dnl Must protect this against being expanded during autoconf m4!
dnl Dont put "dnl"s in this as autoconf will flag an error for unexpanded
dnl macros.
[define(dollarhash,``$][#'')ifelse(dollarhash(x),1,`define(t1,Y)',
``bad: $][# not supported (SunOS /usr/bin/m4)
'')ifelse(eval(89),89,`define(t2,Y)',
`bad: eval() doesnt support 8 or 9 in a constant (OpenBSD 2.6 m4)
')ifelse(eval(9,9),10,`define(t3,Y)',
`bad: eval() doesnt support radix in eval (FreeBSD 8.x,9.0,9.1,9.2 m4)
')ifelse(t1`'t2`'t3,YYY,`good
')]
EOF
dnl ' <- balance the quotes for emacs sh-mode
echo "trying m4" >&AC_FD_CC
gmp_tmp_val=`(m4 conftest.m4) 2>&AC_FD_CC`
echo "$gmp_tmp_val" >&AC_FD_CC
if test "$gmp_tmp_val" = good; then
gmp_cv_prog_m4="m4"
else
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":"
dnl $ac_dummy forces splitting on constant user-supplied paths.
dnl POSIX.2 word splitting is done only on the output of word expansions,
dnl not every word. This closes a longstanding sh security hole.
ac_dummy="$PATH:/usr/5bin"
for ac_dir in $ac_dummy; do
test -z "$ac_dir" && ac_dir=.
echo "trying $ac_dir/m4" >&AC_FD_CC
gmp_tmp_val=`($ac_dir/m4 conftest.m4) 2>&AC_FD_CC`
echo "$gmp_tmp_val" >&AC_FD_CC
if test "$gmp_tmp_val" = good; then
gmp_cv_prog_m4="$ac_dir/m4"
break
fi
done
IFS="$ac_save_ifs"
if test -z "$gmp_cv_prog_m4"; then
AC_MSG_ERROR([No usable m4 in \$PATH or /usr/5bin (see config.log for reasons).])
fi
fi
rm -f conftest.m4
fi])
M4="$gmp_cv_prog_m4"
AC_SUBST(M4)
])
dnl GMP_M4_M4WRAP_SPURIOUS
dnl ----------------------
dnl Check for spurious output from m4wrap(), as described in mpn/asm-defs.m4.
dnl
dnl The following systems have been seen with the problem.
dnl
dnl - Unicos alpha, but its assembler doesn't seem to mind.
dnl - MacOS X Darwin, its assembler fails.
dnl - NetBSD 1.4.1 m68k, and gas 1.92.3 there gives a warning and ignores
dnl the bad last line since it doesn't have a newline.
dnl - NetBSD 1.4.2 alpha, but its assembler doesn't seem to mind.
dnl - HP-UX ia64.
dnl
dnl Enhancement: Maybe this could be in GMP_PROG_M4, and attempt to prefer
dnl an m4 with a working m4wrap, if it can be found.
AC_DEFUN([GMP_M4_M4WRAP_SPURIOUS],
[AC_REQUIRE([GMP_PROG_M4])
AC_CACHE_CHECK([if m4wrap produces spurious output],
gmp_cv_m4_m4wrap_spurious,
[# hide the d-n-l from autoconf's error checking
tmp_d_n_l=d""nl
cat >conftest.m4 <<EOF
[changequote({,})define(x,)m4wrap({x})$tmp_d_n_l]
EOF
echo test input is >&AC_FD_CC
cat conftest.m4 >&AC_FD_CC
tmp_chars=`$M4 conftest.m4 | wc -c`
echo produces $tmp_chars chars output >&AC_FD_CC
rm -f conftest.m4
if test $tmp_chars = 0; then
gmp_cv_m4_m4wrap_spurious=no
else
gmp_cv_m4_m4wrap_spurious=yes
fi
])
GMP_DEFINE_RAW(["define(<M4WRAP_SPURIOUS>,<$gmp_cv_m4_m4wrap_spurious>)"])
])
dnl GMP_PROG_NM
dnl -----------
dnl GMP additions to libtool AC_PROG_NM.
dnl
dnl Note that if AC_PROG_NM can't find a working nm it still leaves
dnl $NM set to "nm", so $NM can't be assumed to actually work.
dnl
dnl A user-selected $NM is always left unchanged. AC_PROG_NM is still run
dnl to get the "checking" message printed though.
dnl
dnl Perhaps it'd be worthwhile checking that nm works, by running it on an
dnl actual object file. For instance on sparcv9 solaris old versions of
dnl GNU nm don't recognise 64-bit objects. Checking would give a better
dnl error message than just a failure in later tests like GMP_ASM_W32 etc.
dnl
dnl On the other hand it's not really normal autoconf practice to take too
dnl much trouble over detecting a broken set of tools. And libtool doesn't
dnl do anything at all for say ranlib or strip. So for now we're inclined
dnl to just demand that the user provides a coherent environment.
AC_DEFUN([GMP_PROG_NM],
[dnl Make sure we're the first to call AC_PROG_NM, so our extra flags are
dnl used by everyone.
AC_BEFORE([$0],[AC_PROG_NM])
gmp_user_NM=$NM
AC_PROG_NM
# FIXME: When cross compiling (ie. $ac_tool_prefix not empty), libtool
# defaults to plain "nm" if a "${ac_tool_prefix}nm" is not found. In this
# case run it again to try the native "nm", firstly so that likely locations
# are searched, secondly so that -B or -p are added if necessary for BSD
# format. This is necessary for instance on OSF with "./configure
# --build=alphaev5-dec-osf --host=alphaev6-dec-osf".
#
if test -z "$gmp_user_NM" && test -n "$ac_tool_prefix" && test "$NM" = nm; then
$as_unset lt_cv_path_NM
gmp_save_ac_tool_prefix=$ac_tool_prefix
ac_tool_prefix=
NM=
AC_PROG_NM
ac_tool_prefix=$gmp_save_ac_tool_prefix
fi
if test -z "$gmp_user_NM"; then
eval nmflags=\"\$nm${abi1}_flags\"
test -n "$nmflags" || eval nmflags=\"\$nm${abi2}_flags\"
if test -n "$nmflags"; then
AC_MSG_CHECKING([for extra nm flags])
NM="$NM $nmflags"
AC_MSG_RESULT([$nmflags])
fi
fi
])
dnl GMP_PROG_CC_WORKS(cc+cflags,[ACTION-IF-WORKS][,ACTION-IF-NOT-WORKS])
dnl --------------------------------------------------------------------
dnl Check if cc+cflags can compile and link.
dnl
dnl This test is designed to be run repeatedly with different cc+cflags
dnl selections, so the result is not cached.
dnl
dnl For a native build, meaning $cross_compiling == no, we require that the
dnl generated program will run. This is the same as AC_PROG_CC does in
dnl _AC_COMPILER_EXEEXT_WORKS, and checking here will ensure we don't pass
dnl a CC/CFLAGS combination that it rejects.
dnl
dnl sparc-*-solaris2.7 can compile ABI=64 but won't run it if the kernel
dnl was booted in 32-bit mode. The effect of requiring the compiler output
dnl will run is that a plain native "./configure" falls back on ABI=32, but
dnl ABI=64 is still available as a cross-compile.
dnl
dnl The various specific problems we try to detect are done in separate
dnl compiles. Although this is probably a bit slower than one test
dnl program, it makes it easy to indicate the problem in AC_MSG_RESULT,
dnl hence giving the user a clue about why we rejected the compiler.
AC_DEFUN([GMP_PROG_CC_WORKS],
[AC_MSG_CHECKING([compiler $1])
gmp_prog_cc_works=yes
# first see a simple "main()" works, then go on to other checks
GMP_PROG_CC_WORKS_PART([$1], [])
GMP_PROG_CC_WORKS_PART([$1], [function pointer return],
[/* The following provokes an internal error from gcc 2.95.2 -mpowerpc64
(without -maix64), hence detecting an unusable compiler */
void *g() { return (void *) 0; }
void *f() { return g(); }
])
GMP_PROG_CC_WORKS_PART([$1], [cmov instruction],
[/* The following provokes an invalid instruction syntax from i386 gcc
-march=pentiumpro on Solaris 2.8. The native sun assembler
requires a non-standard syntax for cmov which gcc (as of 2.95.2 at
least) doesn't know. */
int n;
int cmov () { return (n >= 0 ? n : 0); }
])
GMP_PROG_CC_WORKS_PART([$1], [double -> ulong conversion],
[/* The following provokes a linker invocation problem with gcc 3.0.3
on AIX 4.3 under "-maix64 -mpowerpc64 -mcpu=630". The -mcpu=630
option causes gcc to incorrectly select the 32-bit libgcc.a, not
the 64-bit one, and consequently it misses out on the __fixunsdfdi
helper (double -> uint64 conversion). */
double d;
unsigned long gcc303 () { return (unsigned long) d; }
])
GMP_PROG_CC_WORKS_PART([$1], [double negation],
[/* The following provokes an error from hppa gcc 2.95 under -mpa-risc-2-0 if
the assembler doesn't know hppa 2.0 instructions. fneg is a 2.0
instruction, and a negation like this comes out using it. */
double fneg_data;
unsigned long fneg () { return -fneg_data; }
])
GMP_PROG_CC_WORKS_PART([$1], [double -> float conversion],
[/* The following makes gcc 3.3 -march=pentium4 generate an SSE2 xmm insn
(cvtsd2ss) which will provoke an error if the assembler doesn't recognise
those instructions. Not sure how much of the gmp code will come out
wanting sse2, but it's easiest to reject an option we know is bad. */
double ftod_data;
float ftod () { return (float) ftod_data; }
])
GMP_PROG_CC_WORKS_PART([$1], [gnupro alpha ev6 char spilling],
[/* The following provokes an internal compiler error from gcc version
"2.9-gnupro-99r1" under "-O2 -mcpu=ev6", apparently relating to char
values being spilled into floating point registers. The problem doesn't
show up all the time, but has occurred enough in GMP for us to reject
this compiler+flags. */
#include <string.h> /* for memcpy */
struct try_t
{
char dst[2];
char size;
long d0, d1, d2, d3, d4, d5, d6;
char overlap;
};
struct try_t param[6];
int
param_init ()
{
struct try_t *p;
memcpy (p, ¶m[ 2 ], sizeof (*p));
memcpy (p, ¶m[ 2 ], sizeof (*p));
p->size = 2;
memcpy (p, ¶m[ 1 ], sizeof (*p));
p->dst[0] = 1;
p->overlap = 2;
memcpy (p, ¶m[ 3 ], sizeof (*p));
p->dst[0] = 1;
p->overlap = 8;
memcpy (p, ¶m[ 4 ], sizeof (*p));
memcpy (p, ¶m[ 4 ], sizeof (*p));
p->overlap = 8;
memcpy (p, ¶m[ 5 ], sizeof (*p));
memcpy (p, ¶m[ 5 ], sizeof (*p));
memcpy (p, ¶m[ 5 ], sizeof (*p));
return 0;
}
])
# __builtin_alloca is not available everywhere, check it exists before
# seeing that it works
GMP_PROG_CC_WORKS_PART_TEST([$1],[__builtin_alloca availability],
[int k; int foo () { __builtin_alloca (k); }],
[GMP_PROG_CC_WORKS_PART([$1], [alloca array],
[/* The following provokes an internal compiler error from Itanium HP-UX cc
under +O2 or higher. We use this sort of code in mpn/generic/mul_fft.c. */
int k;
int foo ()
{
int i, **a;
a = __builtin_alloca (k);
for (i = 0; i <= k; i++)
a[i] = __builtin_alloca (1 << i);
}
])])
GMP_PROG_CC_WORKS_PART([$1], [abs int -> double conversion],
[/* The following provokes an internal error from the assembler on
power2-ibm-aix4.3.1.0. gcc -mrios2 compiles to nabs+fcirz, and this
results in "Internal error related to the source program domain".
For reference it seems to be the combination of nabs+fcirz which is bad,
not either alone. This sort of thing occurs in mpz/get_str.c with the
way double chars_per_bit_exactly is applied in MPN_SIZEINBASE. Perhaps
if that code changes to a scaled-integer style then we won't need this
test. */
double fp[1];
int x;
int f ()
{
int a;
a = (x >= 0 ? x : -x);
return a * fp[0];
}
])
GMP_PROG_CC_WORKS_PART([$1], [long long reliability test 1],
[/* The following provokes a segfault in the compiler on powerpc-apple-darwin.
Extracted from tests/mpn/t-iord_u.c. Causes Apple's gcc 3.3 build 1640 and
1666 to segfault with e.g., -O2 -mpowerpc64. */
#if defined (__GNUC__) && ! defined (__cplusplus)
typedef unsigned long long t1;typedef t1*t2;
static __inline__ t1 e(t2 rp,t2 up,int n,t1 v0)
{t1 c,x,r;int i;if(v0){c=1;for(i=1;i<n;i++){x=up[i];r=x+1;rp[i]=r;}}return c;}
f(){static const struct{t1 n;t1 src[9];t1 want[9];}d[]={{1,{0},{1}},};t1 got[9];int i;
for(i=0;i<1;i++){if(e(got,got,9,d[i].n)==0)h();g(i,d[i].src,d[i].n,got,d[i].want,9);if(d[i].n)h();}}
h(){}g(){}
#else
int dummy;
#endif
])
GMP_PROG_CC_WORKS_PART([$1], [long long reliability test 2],
[/* The following provokes an internal compiler error on powerpc-apple-darwin.
Extracted from mpz/cfdiv_q_2exp.c. Causes Apple's gcc 3.3 build 1640 and
1666 to get an ICE with -O1 -mpowerpc64. */
#if defined (__GNUC__) && ! defined (__cplusplus)
f(int u){int i;long long x;x=u?~0:0;if(x)for(i=0;i<9;i++);x&=g();if(x)g();}
g(){}
#else
int dummy;
#endif
])
GMP_PROG_CC_WORKS_PART_MAIN([$1], [mpn_lshift_com optimization],
[/* The following is mis-compiled by HP ia-64 cc version
cc: HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]
under "cc +O3", both in +DD32 and +DD64 modes. The mpn_lshift_com gets
inlined and its return value somehow botched to be 0 instead of 1. This
arises in the real mpn_lshift_com in mul_fft.c. A lower optimization
level, like +O2 seems ok. This code needs to be run to show the problem,
but that's fine, the offending cc is a native-only compiler so we don't
have to worry about cross compiling. */
#if ! defined (__cplusplus)
unsigned long
lshift_com (rp, up, n, cnt)
unsigned long *rp;
unsigned long *up;
long n;
unsigned cnt;
{
unsigned long retval, high_limb, low_limb;
unsigned tnc;
long i;
tnc = 8 * sizeof (unsigned long) - cnt;
low_limb = *up++;
retval = low_limb >> tnc;
high_limb = low_limb << cnt;
for (i = n - 1; i != 0; i--)
{
low_limb = *up++;
*rp++ = ~(high_limb | (low_limb >> tnc));
high_limb = low_limb << cnt;
}
return retval;
}
int
main ()
{
unsigned long cy, rp[2], up[2];
up[0] = ~ 0L;
up[1] = 0;
cy = lshift_com (rp, up, 2L, 1);
if (cy != 1L)
return 1;
return 0;
}
#else
int
main ()
{
return 0;
}
#endif
])
GMP_PROG_CC_WORKS_PART_MAIN([$1], [mpn_lshift_com optimization 2],
[/* The following is mis-compiled by Intel ia-64 icc version 1.8 under
"icc -O3", After several calls, the function writes partial garbage to
the result vector. Perhaps relates to the chk.a.nc insn. This code needs
to be run to show the problem, but that's fine, the offending cc is a
native-only compiler so we don't have to worry about cross compiling. */
#if ! defined (__cplusplus)
#include <stdlib.h>
void
lshift_com (rp, up, n, cnt)
unsigned long *rp;
unsigned long *up;
long n;
unsigned cnt;
{
unsigned long high_limb, low_limb;
unsigned tnc;
long i;
up += n;
rp += n;
tnc = 8 * sizeof (unsigned long) - cnt;
low_limb = *--up;
high_limb = low_limb << cnt;
for (i = n - 1; i != 0; i--)
{
low_limb = *--up;
*--rp = ~(high_limb | (low_limb >> tnc));
high_limb = low_limb << cnt;
}
*--rp = ~high_limb;
}
int
main ()
{
unsigned long *r, *r2;
unsigned long a[88 + 1];
long i;
for (i = 0; i < 88 + 1; i++)
a[i] = ~0L;
r = malloc (10000 * sizeof (unsigned long));
r2 = r;
for (i = 0; i < 528; i += 22)
{
lshift_com (r2, a,
i / (8 * sizeof (unsigned long)) + 1,
i % (8 * sizeof (unsigned long)));
r2 += 88 + 1;
}
if (r[2048] != 0 || r[2049] != 0 || r[2050] != 0 || r[2051] != 0 ||
r[2052] != 0 || r[2053] != 0 || r[2054] != 0)
abort ();
return 0;
}
#else
int
main ()
{
return 0;
}
#endif
])
# A certain _GLOBAL_OFFSET_TABLE_ problem in past versions of gas, tickled
# by recent versions of gcc.
#
if test "$gmp_prog_cc_works" = yes; then
case $host in
X86_PATTERN)
# this problem only arises in PIC code, so don't need to test when
# --disable-shared. We don't necessarily have $enable_shared set to
# yes at this point, it will still be unset for the default (which is
# yes); hence the use of "!= no".
if test "$enable_shared" != no; then
GMP_PROG_CC_X86_GOT_EAX_EMITTED([$1],
[GMP_ASM_X86_GOT_EAX_OK([$1],,
[gmp_prog_cc_works="no, bad gas GOT with eax"])])
fi
;;
esac
fi
AC_MSG_RESULT($gmp_prog_cc_works)
case $gmp_prog_cc_works in
yes)
[$2]
;;
*)
[$3]
;;
esac
])
dnl Called: GMP_PROG_CC_WORKS_PART(CC+CFLAGS,FAIL-MESSAGE [,CODE])
dnl A dummy main() is appended to the CODE given.
dnl
AC_DEFUN([GMP_PROG_CC_WORKS_PART],
[GMP_PROG_CC_WORKS_PART_MAIN([$1],[$2],
[$3]
[int main () { return 0; }])
])
dnl Called: GMP_PROG_CC_WORKS_PART_MAIN(CC+CFLAGS,FAIL-MESSAGE,CODE)
dnl CODE must include a main().
dnl
AC_DEFUN([GMP_PROG_CC_WORKS_PART_MAIN],
[GMP_PROG_CC_WORKS_PART_TEST([$1],[$2],[$3],
[],
gmp_prog_cc_works="no[]m4_if([$2],,,[[, ]])[$2]",
gmp_prog_cc_works="no[]m4_if([$2],,,[[, ]])[$2][[, program does not run]]")
])
dnl Called: GMP_PROG_CC_WORKS_PART_TEST(CC+CFLAGS,TITLE,[CODE],
dnl [ACTION-GOOD],[ACTION-BAD][ACTION-NORUN])
dnl
AC_DEFUN([GMP_PROG_CC_WORKS_PART_TEST],
[if test "$gmp_prog_cc_works" = yes; then
# remove anything that might look like compiler output to our "||" expression
rm -f conftest* a.out b.out a.exe a_out.exe
cat >conftest.c <<EOF
[$3]
EOF
echo "Test compile: [$2]" >&AC_FD_CC
gmp_compile="$1 conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
cc_works_part=yes
if test "$cross_compiling" = no; then
if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then :;
else
cc_works_part=norun
fi
fi
else
cc_works_part=no
fi
if test "$cc_works_part" != yes; then
echo "failed program was:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
fi
rm -f conftest* a.out b.out a.exe a_out.exe
case $cc_works_part in
yes)
$4
;;
no)
$5
;;
norun)
$6
;;
esac
fi
])
dnl GMP_PROG_CC_WORKS_LONGLONG(cc+cflags,[ACTION-YES][,ACTION-NO])
dnl --------------------------------------------------------------
dnl Check that cc+cflags accepts "long long".
dnl
dnl This test is designed to be run repeatedly with different cc+cflags
dnl selections, so the result is not cached.
AC_DEFUN([GMP_PROG_CC_WORKS_LONGLONG],
[AC_MSG_CHECKING([compiler $1 has long long])
cat >conftest.c <<EOF
long long foo;
long long bar () { return foo; }
int main () { return 0; }
EOF
gmp_prog_cc_works=no
gmp_compile="$1 -c conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
gmp_prog_cc_works=yes
else
echo "failed program was:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
fi
rm -f conftest* a.out b.out a.exe a_out.exe
AC_MSG_RESULT($gmp_prog_cc_works)
if test $gmp_prog_cc_works = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_C_TEST_SIZEOF(cc/cflags,test,[ACTION-GOOD][,ACTION-BAD])
dnl ------------------------------------------------------------
dnl The given cc/cflags compiler is run to check the size of a type
dnl specified by the "test" argument. "test" can either be a string, or a
dnl variable like $foo. The value should be for instance "sizeof-long-4",
dnl to test that sizeof(long)==4.
dnl
dnl This test is designed to be run for different compiler and/or flags
dnl combinations, so the result is not cached.
dnl
dnl The idea for making an array that has a negative size if the desired
dnl condition test is false comes from autoconf AC_CHECK_SIZEOF. The cast
dnl to "long" in the array dimension also follows autoconf, apparently it's
dnl a workaround for a HP compiler bug.
AC_DEFUN([GMP_C_TEST_SIZEOF],
[echo "configure: testlist $2" >&AC_FD_CC
[gmp_sizeof_type=`echo "$2" | sed 's/sizeof-\([a-z]*\).*/\1/'`]
[gmp_sizeof_want=`echo "$2" | sed 's/sizeof-[a-z]*-\([0-9]*\).*/\1/'`]
AC_MSG_CHECKING([compiler $1 has sizeof($gmp_sizeof_type)==$gmp_sizeof_want])
cat >conftest.c <<EOF
[int
main ()
{
static int test_array [1 - 2 * (long) (sizeof ($gmp_sizeof_type) != $gmp_sizeof_want)];
test_array[0] = 0;
return 0;
}]
EOF
gmp_c_testlist_sizeof=no
gmp_compile="$1 -c conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
gmp_c_testlist_sizeof=yes
fi
rm -f conftest*
AC_MSG_RESULT($gmp_c_testlist_sizeof)
if test $gmp_c_testlist_sizeof = yes; then
ifelse([$3],,:,[$3])
else
ifelse([$4],,:,[$4])
fi
])
dnl GMP_PROG_CC_IS_GNU(CC,[ACTIONS-IF-YES][,ACTIONS-IF-NO])
dnl -------------------------------------------------------
dnl Determine whether the given compiler is GNU C.
dnl
dnl This test is the same as autoconf _AC_LANG_COMPILER_GNU, but doesn't
dnl cache the result. The same "ifndef" style test is used, to avoid
dnl problems with syntax checking cpp's used on NeXT and Apple systems.
AC_DEFUN([GMP_PROG_CC_IS_GNU],
[cat >conftest.c <<EOF
#if ! defined (__GNUC__) || defined (__INTEL_COMPILER)
choke me
#endif
EOF
gmp_compile="$1 -c conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
rm -f conftest*
AC_MSG_CHECKING([whether $1 is gcc])
AC_MSG_RESULT(yes)
ifelse([$2],,:,[$2])
else
rm -f conftest*
ifelse([$3],,:,[$3])
fi
])
dnl GMP_PROG_CC_IS_XLC(CC,[ACTIONS-IF-YES][,ACTIONS-IF-NO])
dnl -------------------------------------------------------
dnl Determine whether the given compiler is IBM xlc (on AIX).
dnl
dnl There doesn't seem to be a preprocessor symbol to test for this, or if
dnl there is one then it's well hidden in xlc 3.1 on AIX 4.3, so just grep
dnl the man page printed when xlc is invoked with no arguments.
AC_DEFUN([GMP_PROG_CC_IS_XLC],
[gmp_command="$1 2>&1 | grep xlc >/dev/null"
if AC_TRY_EVAL(gmp_command); then
AC_MSG_CHECKING([whether $1 is xlc])
AC_MSG_RESULT(yes)
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_PROG_CC_X86_GOT_EAX_EMITTED(CC+CFLAGS, [ACTION-YES] [, ACTION-NO])
dnl ----------------------------------------------------------------------
dnl Determine whether CC+CFLAGS emits instructions using %eax with
dnl _GLOBAL_OFFSET_TABLE_. This test is for use on x86 systems.
dnl
dnl Recent versions of gcc will use %eax for the GOT in leaf functions, for
dnl instance gcc 3.3.3 with -O3. This avoids having to save and restore
dnl %ebx which otherwise usually holds the GOT, and is what gcc used in the
dnl past.
dnl
dnl %ecx and %edx are also candidates for this sort of optimization, and
dnl are used under lesser optimization levels, like -O2 in 3.3.3. FIXME:
dnl It's not quite clear what the conditions for using %eax are, we might
dnl need more test code to provoke it.
dnl
dnl The motivation for this test is that past versions of gas have bugs
dnl affecting this usage, see GMP_ASM_X86_GOT_EAX_OK.
dnl
dnl This test is not specific to gcc, other compilers might emit %eax GOT
dnl insns like this, though we've not investigated that.
dnl
dnl This is for use by compiler probing in GMP_PROG_CC_WORKS, so we doesn't
dnl cache the result.
dnl
dnl -fPIC is hard coded here, because this test is for use before libtool
dnl has established the pic options. It's right for gcc, but perhaps not
dnl other compilers.
AC_DEFUN([GMP_PROG_CC_X86_GOT_EAX_EMITTED],
[echo "Testing gcc GOT with eax emitted" >&AC_FD_CC
cat >conftest.c <<\EOF
[int foo;
int bar () { return foo; }
]EOF
tmp_got_emitted=no
gmp_compile="$1 -fPIC -S conftest.c >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(gmp_compile); then
if grep "addl.*_GLOBAL_OFFSET_TABLE_.*eax" conftest.s >/dev/null; then
tmp_got_emitted=yes
fi
fi
rm -f conftest.*
echo "Result: $tmp_got_emitted" >&AC_FD_CC
if test "$tmp_got_emitted" = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_HPC_HPPA_2_0(cc,[ACTION-IF-GOOD][,ACTION-IF-BAD])
dnl ---------------------------------------------------------
dnl Find out whether a HP compiler is good enough to generate hppa 2.0.
dnl
dnl This test might be repeated for different compilers, so the result is
dnl not cached.
AC_DEFUN([GMP_HPC_HPPA_2_0],
[AC_MSG_CHECKING([whether HP compiler $1 is good for 64-bits])
# Bad compiler output:
# ccom: HP92453-01 G.10.32.05 HP C Compiler
# Good compiler output:
# ccom: HP92453-01 A.10.32.30 HP C Compiler
# Let A.10.32.30 or higher be ok.
echo >conftest.c
gmp_tmp_vs=`$1 $2 -V -c -o conftest.$OBJEXT conftest.c 2>&1 | grep "^ccom:"`
echo "Version string: $gmp_tmp_vs" >&AC_FD_CC
rm conftest*
gmp_tmp_v1=`echo $gmp_tmp_vs | sed 's/.* .\.\([[0-9]]*\).*/\1/'`
gmp_tmp_v2=`echo $gmp_tmp_vs | sed 's/.* .\..*\.\(.*\)\..* HP C.*/\1/'`
gmp_tmp_v3=`echo $gmp_tmp_vs | sed 's/.* .\..*\..*\.\(.*\) HP C.*/\1/'`
echo "Version number: $gmp_tmp_v1.$gmp_tmp_v2.$gmp_tmp_v3" >&AC_FD_CC
if test -z "$gmp_tmp_v1"; then
gmp_hpc_64bit=not-applicable
else
GMP_COMPARE_GE($gmp_tmp_v1, 10, $gmp_tmp_v2, 32, $gmp_tmp_v3, 30)
gmp_hpc_64bit=$gmp_compare_ge
fi
AC_MSG_RESULT($gmp_hpc_64bit)
if test $gmp_hpc_64bit = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_GCC_ARM_UMODSI(CC,[ACTIONS-IF-GOOD][,ACTIONS-IF-BAD])
dnl ---------------------------------------------------------
dnl gcc 2.95.3 and earlier on arm has a bug in the libgcc __umodsi routine
dnl making "%" give wrong results for some operands, eg. "0x90000000 % 3".
dnl We're hoping it'll be fixed in 2.95.4, and we know it'll be fixed in
dnl gcc 3.
dnl
dnl There's only a couple of places gmp cares about this, one is the
dnl size==1 case in mpn/generic/mode1o.c, and this shows up in
dnl tests/mpz/t-jac.c as a wrong result from mpz_kronecker_ui.
AC_DEFUN([GMP_GCC_ARM_UMODSI],
[AC_MSG_CHECKING([whether ARM gcc unsigned division works])
tmp_version=`$1 --version`
echo "$tmp_version" >&AC_FD_CC
case $tmp_version in
[2.95 | 2.95.[123]])
ifelse([$3],,:,[$3])
gmp_gcc_arm_umodsi_result=["no, gcc 2.95.[0123]"] ;;
*)
ifelse([$2],,:,[$2])
gmp_gcc_arm_umodsi_result=yes ;;
esac
AC_MSG_RESULT([$gmp_gcc_arm_umodsi_result])
])
dnl GMP_GCC_MIPS_O32(gcc,[actions-yes][,[actions-no]])
dnl -------------------------------------------------
dnl Test whether gcc supports o32.
dnl
dnl gcc 2.7.2.2 only does o32, and doesn't accept -mabi=32.
dnl
dnl gcc 2.95 accepts -mabi=32 but it only works on irix5, on irix6 it gives
dnl "cc1: The -mabi=32 support does not work yet".
AC_DEFUN([GMP_GCC_MIPS_O32],
[AC_MSG_CHECKING([whether gcc supports o32])
echo 'int x;' >conftest.c
echo "$1 -mabi=32 -c conftest.c" >&AC_FD_CC
if $1 -mabi=32 -c conftest.c >conftest.out 2>&1; then
result=yes
else
cat conftest.out >&AC_FD_CC
if grep "cc1: Invalid option \`abi=32'" conftest.out >/dev/null; then
result=yes
else
result=no
fi
fi
rm -f conftest.*
AC_MSG_RESULT($result)
if test $result = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_GCC_NO_CPP_PRECOMP(CCBASE,CC,CFLAGS,[ACTIONS-YES][,ACTIONS-NO])
dnl -------------------------------------------------------------------
dnl Check whether -no-cpp-precomp should be used on this compiler, and
dnl execute the corresponding ACTIONS-YES or ACTIONS-NO.
dnl
dnl -no-cpp-precomp is only meant for Apple's hacked version of gcc found
dnl on powerpc*-*-darwin*, but we can give it a try on any gcc. Normal gcc
dnl (as of 3.0 at least) only gives a warning, not an actual error, and we
dnl watch for that and decide against the option in that case, to avoid
dnl confusing the user.
AC_DEFUN([GMP_GCC_NO_CPP_PRECOMP],
[if test "$ccbase" = gcc; then
AC_MSG_CHECKING([compiler $2 $3 -no-cpp-precomp])
result=no
cat >conftest.c <<EOF
int main () { return 0; }
EOF
gmp_compile="$2 $3 -no-cpp-precomp conftest.c >conftest.out 2>&1"
if AC_TRY_EVAL(gmp_compile); then
if grep "unrecognized option.*-no-cpp-precomp" conftest.out >/dev/null; then : ;
else
result=yes
fi
fi
cat conftest.out >&AC_FD_CC
rm -f conftest* a.out b.out a.exe a_out.exe
AC_MSG_RESULT($result)
if test "$result" = yes; then
ifelse([$4],,:,[$4])
else
ifelse([$5],,:,[$5])
fi
fi
])
dnl GMP_GCC_PENTIUM4_SSE2(CC+CFLAGS,[ACTION-IF-YES][,ACTION-IF-NO])
dnl ---------------------------------------------------------------
dnl Determine whether gcc CC+CFLAGS is a good enough version for
dnl -march=pentium4 with sse2.
dnl
dnl Gcc 3.2.1 was seen generating incorrect code for raw double -> int
dnl conversions through a union. We believe the problem is in all 3.1 and
dnl 3.2 versions, but that it's fixed in 3.3.
AC_DEFUN([GMP_GCC_PENTIUM4_SSE2],
[AC_MSG_CHECKING([whether gcc is good for sse2])
case `$1 -dumpversion` in
[3.[012] | 3.[012].*]) result=no ;;
*) result=yes ;;
esac
AC_MSG_RESULT($result)
if test "$result" = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_GCC_WA_MCPU(CC+CFLAGS, NEWFLAG [,ACTION-YES [,ACTION-NO]])
dnl --------------------------------------------------------------
dnl Check whether gcc (or gas rather) accepts a flag like "-Wa,-mev67".
dnl
dnl Gas doesn't give an error for an unknown cpu, it only prints a warning
dnl like "Warning: Unknown CPU identifier `ev78'".
dnl
dnl This is intended for use on alpha, since only recent versions of gas
dnl accept -mev67, but there's nothing here that's alpha specific.
AC_DEFUN([GMP_GCC_WA_MCPU],
[AC_MSG_CHECKING([assembler $1 $2])
result=no
cat >conftest.c <<EOF
int main () {}
EOF
gmp_compile="$1 $2 -c conftest.c >conftest.out 2>&1"
if AC_TRY_EVAL(gmp_compile); then
if grep "Unknown CPU identifier" conftest.out >/dev/null; then : ;
else
result=yes
fi
fi
cat conftest.out >&AC_FD_CC
rm -f conftest*
AC_MSG_RESULT($result)
if test "$result" = yes; then
ifelse([$3],,:,[$3])
else
ifelse([$4],,:,[$4])
fi
])
dnl GMP_GCC_WA_OLDAS(CC+CFLAGS [,ACTION-YES [,ACTION-NO]])
dnl ------------------------------------------------------
dnl Check whether gcc should be run with "-Wa,-oldas".
dnl
dnl On systems alpha*-*-osf* (or maybe just osf5), apparently there's a
dnl newish Compaq "as" which doesn't work with the gcc mips-tfile.
dnl Compiling an empty file with "gcc -c foo.c" produces for instance
dnl
dnl mips-tfile, /tmp/ccaqUNnF.s:7 Segmentation fault
dnl
dnl The fix is to pass "-oldas" to that assembler, as noted by
dnl
dnl http://gcc.gnu.org/install/specific.html#alpha*-dec-osf*
dnl
dnl The test here tries to compile an empty file, and if that fails but
dnl adding -Wa,-oldas makes it succeed, then that flag is considered
dnl necessary.
dnl
dnl We look for the failing case specifically, since it may not be a good
dnl idea to use -Wa,-oldas in other circumstances. For instance gas takes
dnl "-oldas" to mean the "-o" option and will write a file called "ldas" as
dnl its output. Normally gcc puts its own "-o" after any -Wa options, so
dnl -oldas ends up being harmless, but clearly that's only through good
dnl luck.
dnl
dnl This macro is designed for use while probing for a good compiler, and
dnl so doesn't cache it's result.
AC_DEFUN([GMP_GCC_WA_OLDAS],
[AC_MSG_CHECKING([for $1 -Wa,-oldas])
result=no
cat >conftest.c <<EOF
EOF
echo "with empty conftest.c" >&AC_FD_CC
gmp_compile="$1 -c conftest.c >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(gmp_compile); then : ;
else
# empty fails
gmp_compile="$1 -Wa,-oldas -c conftest.c >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(gmp_compile); then
# but with -Wa,-oldas it works
result=yes
fi
fi
rm -f conftest*
AC_MSG_RESULT($result)
if test "$result" = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_OS_X86_XMM(CC+CFLAGS,[ACTION-IF-YES][,ACTION-IF-NO])
dnl --------------------------------------------------------
dnl Determine whether the operating system supports XMM registers.
dnl
dnl If build==host then a test program is run, executing an SSE2
dnl instruction using an XMM register. This will give a SIGILL if the
dnl system hasn't set the OSFXSR bit in CR4 to say it knows it must use
dnl fxsave/fxrestor in a context switch (to save xmm registers).
dnl
dnl If build!=host, we can fallback on:
dnl
dnl - FreeBSD version 4 is the first supporting xmm.
dnl
dnl - Linux kernel 2.4 might be the first stable series supporting xmm
dnl (not sure). But there's no version number in the GNU/Linux
dnl config tuple to test anyway.
dnl
dnl The default is to allow xmm. This might seem rash, but it's likely
dnl most systems know xmm by now, so this will normally be what's wanted.
dnl And cross compiling is a bit hairy anyway, so hopefully anyone doing it
dnl will be smart enough to know what to do.
dnl
dnl In the test program, .text and .globl are hard coded because this macro
dnl is wanted before GMP_ASM_TEXT and GMP_ASM_GLOBL are run. A .byte
dnl sequence is used (for xorps %xmm0, %xmm0) to make us independent of
dnl tests for whether the assembler supports sse2/xmm. Obviously we need
dnl both assembler and OS support, but this means we don't force the order
dnl in which we test.
dnl
dnl FIXME: Maybe we should use $CCAS to assemble, if it's set. (Would
dnl still want $CC/$CFLAGS for the link.) But this test is used before
dnl AC_PROG_CC sets $OBJEXT, so we'd need to check for various object file
dnl suffixes ourselves.
AC_DEFUN([GMP_OS_X86_XMM],
[AC_CACHE_CHECK([whether the operating system supports XMM registers],
gmp_cv_os_x86_xmm,
[if test "$build" = "$host"; then
# remove anything that might look like compiler output to our "||" expression
rm -f conftest* a.out b.out a.exe a_out.exe
cat >conftest.s <<EOF
.text
main:
_main:
.globl main
.globl _main
.byte 0x0f, 0x57, 0xc0
xorl %eax, %eax
ret
EOF
gmp_compile="$1 conftest.s -o conftest >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then
gmp_cv_os_x86_xmm=yes
else
gmp_cv_os_x86_xmm=no
fi
else
AC_MSG_WARN([Oops, cannot compile test program])
fi
rm -f conftest*
fi
if test -z "$gmp_cv_os_x86_xmm"; then
case $host_os in
[freebsd[123] | freebsd[123].*])
gmp_cv_os_x86_xmm=no ;;
freebsd*)
gmp_cv_os_x86_xmm=yes ;;
*)
gmp_cv_os_x86_xmm=probably ;;
esac
fi
])
if test "$gmp_cv_os_x86_xmm" = probably; then
AC_MSG_WARN([Not certain of OS support for xmm when cross compiling.])
AC_MSG_WARN([Will assume it's ok, expect a SIGILL if this is wrong.])
fi
case $gmp_cv_os_x86_xmm in
no)
$3
;;
*)
$2
;;
esac
])
dnl GMP_CRAY_HOST_TYPES(C90/T90-IEEE, C90/T90-CFP, J90/SV1)
dnl -------------------------------------------------------
dnl Execute the actions in the arguments on the respective Cray vector
dnl systems. For other hosts, do nothing.
dnl
dnl This macro should be used after the C compiler has been chosen, since
dnl on c90 and t90 we ask the compiler whether we're in IEEE or CFP float
dnl mode.
dnl
dnl This code is in a macro so that any AC_REQUIRE pre-requisites of
dnl AC_EGREP_CPP will be expanded at the top-level, ie. for all hosts not
dnl merely c90 and t90. In autoconf 2.57 for instance this means
dnl AC_PROG_EGREP, which is needed by various other macros.
AC_DEFUN([GMP_CRAY_OPTIONS],
[case $host_cpu in
c90 | t90)
AC_EGREP_CPP(yes,
[#ifdef _CRAYIEEE
yes
#endif],
[$1],
[$2])
;;
j90 | sv1)
[$3]
;;
esac
])
dnl GMP_HPPA_LEVEL_20(cc/cflags [, ACTION-GOOD [,ACTION-BAD]])
dnl ----------------------------------------------------------
dnl Check that the given cc/cflags accepts HPPA 2.0n assembler code.
dnl
dnl Old versions of gas don't know 2.0 instructions. It rejects ".level
dnl 2.0" for a start, so just test that.
dnl
dnl This test is designed to be run for various different compiler and
dnl flags combinations, and hence doesn't cache its result.
AC_DEFUN([GMP_HPPA_LEVEL_20],
[AC_MSG_CHECKING([$1 assembler knows hppa 2.0])
result=no
cat >conftest.s <<EOF
.level 2.0
EOF
gmp_compile="$1 -c conftest.s >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(gmp_compile); then
result=yes
else
echo "failed program was" >&AC_FD_CC
cat conftest.s >&AC_FD_CC
fi
rm -f conftest*
AC_MSG_RESULT($result)
if test "$result" = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_PROG_CXX_WORKS(cxx/cxxflags [, ACTION-YES [,ACTION-NO]])
dnl ------------------------------------------------------------
dnl Check whether cxx/cxxflags can compile and link.
dnl
dnl This test is designed to be run repeatedly with different cxx/cxxflags
dnl selections, so the result is not cached.
dnl
dnl For a native build, we insist on being able to run the program, so as
dnl to detect any problems with the standard C++ library. During
dnl development various systems with broken or incomplete C++ installations
dnl were seen.
dnl
dnl The various features and problems we try to detect are done in separate
dnl compiles. Although this is probably a bit slower than one test
dnl program, it makes it easy to indicate the problem in AC_MSG_RESULT,
dnl hence giving the user a clue about why we rejected the compiler.
AC_DEFUN([GMP_PROG_CXX_WORKS],
[AC_MSG_CHECKING([C++ compiler $1])
gmp_prog_cxx_works=yes
# start with a plain "main()", then go on to further checks
GMP_PROG_CXX_WORKS_PART([$1], [])
GMP_PROG_CXX_WORKS_PART([$1], [namespace],
[namespace foo { }
using namespace foo;
])
# GMP requires the standard C++ iostream classes
GMP_PROG_CXX_WORKS_PART([$1], [std iostream],
[/* This test rejects g++ 2.7.2 which doesn't have <iostream>, only a
pre-standard iostream.h. */
#include <iostream>
/* This test rejects OSF 5.1 Compaq C++ in its default pre-standard iostream
mode, since that mode puts cout in the global namespace, not "std". */
void someoutput (void) { std::cout << 123; }
])
AC_MSG_RESULT($gmp_prog_cxx_works)
case $gmp_prog_cxx_works in
yes)
[$2]
;;
*)
[$3]
;;
esac
])
dnl Called: GMP_PROG_CXX_WORKS_PART(CXX+CXXFLAGS, FAIL-MESSAGE [,CODE])
dnl
AC_DEFUN([GMP_PROG_CXX_WORKS_PART],
[if test "$gmp_prog_cxx_works" = yes; then
# remove anything that might look like compiler output to our "||" expression
rm -f conftest* a.out b.out a.exe a_out.exe
cat >conftest.cc <<EOF
[$3]
int main (void) { return 0; }
EOF
echo "Test compile: [$2]" >&AC_FD_CC
gmp_cxxcompile="$1 conftest.cc >&AC_FD_CC"
if AC_TRY_EVAL(gmp_cxxcompile); then
if test "$cross_compiling" = no; then
if AC_TRY_COMMAND([./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest]); then :;
else
gmp_prog_cxx_works="no[]m4_if([$2],,,[, ])[$2], program does not run"
fi
fi
else
gmp_prog_cxx_works="no[]m4_if([$2],,,[, ])[$2]"
fi
case $gmp_prog_cxx_works in
no*)
echo "failed program was:" >&AC_FD_CC
cat conftest.cc >&AC_FD_CC
;;
esac
rm -f conftest* a.out b.out a.exe a_out.exe
fi
])
dnl GMP_INIT([M4-DEF-FILE])
dnl -----------------------
dnl Initializations for GMP config.m4 generation.
dnl
dnl FIXME: The generated config.m4 doesn't get recreated by config.status.
dnl Maybe the relevant "echo"s should go through AC_CONFIG_COMMANDS.
AC_DEFUN([GMP_INIT],
[ifelse([$1], , gmp_configm4=config.m4, gmp_configm4="[$1]")
gmp_tmpconfigm4=cnfm4.tmp
gmp_tmpconfigm4i=cnfm4i.tmp
gmp_tmpconfigm4p=cnfm4p.tmp
rm -f $gmp_tmpconfigm4 $gmp_tmpconfigm4i $gmp_tmpconfigm4p
# CONFIG_TOP_SRCDIR is a path from the mpn builddir to the top srcdir.
# The pattern here tests for an absolute path the same way as
# _AC_OUTPUT_FILES in autoconf acgeneral.m4.
case $srcdir in
[[\\/]]* | ?:[[\\/]]* ) tmp="$srcdir" ;;
*) tmp="../$srcdir" ;;
esac
echo ["define(<CONFIG_TOP_SRCDIR>,<\`$tmp'>)"] >>$gmp_tmpconfigm4
# All CPUs use asm-defs.m4
echo ["include][(CONFIG_TOP_SRCDIR\`/mpn/asm-defs.m4')"] >>$gmp_tmpconfigm4i
])
dnl GMP_FINISH
dnl ----------
dnl Create config.m4 from its accumulated parts.
dnl
dnl __CONFIG_M4_INCLUDED__ is used so that a second or subsequent include
dnl of config.m4 is harmless.
dnl
dnl A separate ifdef on the angle bracket quoted part ensures the quoting
dnl style there is respected. The basic defines from gmp_tmpconfigm4 are
dnl fully quoted but are still put under an ifdef in case any have been
dnl redefined by one of the m4 include files.
dnl
dnl Doing a big ifdef within asm-defs.m4 and/or other macro files wouldn't
dnl work, since it'd interpret parentheses and quotes in dnl comments, and
dnl having a whole file as a macro argument would overflow the string space
dnl on BSD m4.
AC_DEFUN([GMP_FINISH],
[AC_REQUIRE([GMP_INIT])
echo "creating $gmp_configm4"
echo ["d""nl $gmp_configm4. Generated automatically by configure."] > $gmp_configm4
if test -f $gmp_tmpconfigm4; then
echo ["changequote(<,>)"] >> $gmp_configm4
echo ["ifdef(<__CONFIG_M4_INCLUDED__>,,<"] >> $gmp_configm4
cat $gmp_tmpconfigm4 >> $gmp_configm4
echo [">)"] >> $gmp_configm4
echo ["changequote(\`,')"] >> $gmp_configm4
rm $gmp_tmpconfigm4
fi
echo ["ifdef(\`__CONFIG_M4_INCLUDED__',,\`"] >> $gmp_configm4
if test -f $gmp_tmpconfigm4i; then
cat $gmp_tmpconfigm4i >> $gmp_configm4
rm $gmp_tmpconfigm4i
fi
if test -f $gmp_tmpconfigm4p; then
cat $gmp_tmpconfigm4p >> $gmp_configm4
rm $gmp_tmpconfigm4p
fi
echo ["')"] >> $gmp_configm4
echo ["define(\`__CONFIG_M4_INCLUDED__')"] >> $gmp_configm4
])
dnl GMP_INCLUDE_MPN(FILE)
dnl ---------------------
dnl Add an include_mpn(`FILE') to config.m4. FILE should be a path
dnl relative to the mpn source directory, for example
dnl
dnl GMP_INCLUDE_MPN(`x86/x86-defs.m4')
dnl
AC_DEFUN([GMP_INCLUDE_MPN],
[AC_REQUIRE([GMP_INIT])
echo ["include_mpn(\`$1')"] >> $gmp_tmpconfigm4i
])
dnl GMP_DEFINE(MACRO, DEFINITION [, LOCATION])
dnl ------------------------------------------
dnl Define M4 macro MACRO as DEFINITION in temporary file.
dnl
dnl If LOCATION is `POST', the definition will appear after any include()
dnl directives inserted by GMP_INCLUDE. Mind the quoting! No shell
dnl variables will get expanded. Don't forget to invoke GMP_FINISH to
dnl create file config.m4. config.m4 uses `<' and '>' as quote characters
dnl for all defines.
AC_DEFUN([GMP_DEFINE],
[AC_REQUIRE([GMP_INIT])
echo ['define(<$1>, <$2>)'] >>ifelse([$3], [POST],
$gmp_tmpconfigm4p, $gmp_tmpconfigm4)
])
dnl GMP_DEFINE_RAW(STRING [, LOCATION])
dnl ------------------------------------
dnl Put STRING into config.m4 file.
dnl
dnl If LOCATION is `POST', the definition will appear after any include()
dnl directives inserted by GMP_INCLUDE. Don't forget to invoke GMP_FINISH
dnl to create file config.m4.
AC_DEFUN([GMP_DEFINE_RAW],
[AC_REQUIRE([GMP_INIT])
echo [$1] >> ifelse([$2], [POST], $gmp_tmpconfigm4p, $gmp_tmpconfigm4)
])
dnl GMP_TRY_ASSEMBLE(asm-code,[action-success][,action-fail])
dnl ----------------------------------------------------------
dnl Attempt to assemble the given code.
dnl Do "action-success" if this succeeds, "action-fail" if not.
dnl
dnl conftest.o and conftest.out are available for inspection in
dnl "action-success". If either action does a "break" out of a loop then
dnl an explicit "rm -f conftest*" will be necessary.
dnl
dnl This is not unlike AC_TRY_COMPILE, but there's no default includes or
dnl anything in "asm-code", everything wanted must be given explicitly.
AC_DEFUN([GMP_TRY_ASSEMBLE],
[cat >conftest.s <<EOF
[$1]
EOF
gmp_assemble="$CCAS $CFLAGS $CPPFLAGS conftest.s >conftest.out 2>&1"
if AC_TRY_EVAL(gmp_assemble); then
cat conftest.out >&AC_FD_CC
ifelse([$2],,:,[$2])
else
cat conftest.out >&AC_FD_CC
echo "configure: failed program was:" >&AC_FD_CC
cat conftest.s >&AC_FD_CC
ifelse([$3],,:,[$3])
fi
rm -f conftest*
])
dnl Checks whether the stack can be marked nonexecutable by passing an option
dnl to the C-compiler when acting on .s files. Appends that option to ASFLAGS.
dnl This macro is adapted from one found in GLIBC-2.3.5.
AC_DEFUN([CL_AS_NOEXECSTACK],[
dnl AC_REQUIRE([AC_PROG_CC]) GMP uses something else
AC_CACHE_CHECK([whether assembler supports --noexecstack option],
cl_cv_as_noexecstack, [dnl
cat > conftest.c <<EOF
void foo() {}
EOF
if AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS
-S -o conftest.s conftest.c >/dev/null]) \
&& grep .note.GNU-stack conftest.s >/dev/null \
&& AC_TRY_COMMAND([${CC} $CFLAGS $CPPFLAGS -Wa,--noexecstack
-c -o conftest.o conftest.s >/dev/null])
then
cl_cv_as_noexecstack=yes
else
cl_cv_as_noexecstack=no
fi
rm -f conftest*])
if test "$cl_cv_as_noexecstack" = yes; then
ASMFLAGS="$ASMFLAGS -Wa,--noexecstack"
fi
AC_SUBST(ASMFLAGS)
])
dnl GMP_ASM_LABEL_SUFFIX
dnl --------------------
dnl : - is usual.
dnl empty - hppa on HP-UX doesn't use a :, just the label name
dnl
dnl Note that it's necessary to test the empty case first, since HP "as"
dnl will accept "somelabel:", and take it to mean a label with a name that
dnl happens to end in a colon.
AC_DEFUN([GMP_ASM_LABEL_SUFFIX],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([for assembler label suffix],
gmp_cv_asm_label_suffix,
[gmp_cv_asm_label_suffix=unknown
for i in "" ":"; do
echo "trying $i" >&AC_FD_CC
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
somelabel$i],
[gmp_cv_asm_label_suffix=$i
rm -f conftest*
break],
[cat conftest.out >&AC_FD_CC])
done
if test "$gmp_cv_asm_label_suffix" = "unknown"; then
AC_MSG_ERROR([Cannot determine label suffix])
fi
])
echo ["define(<LABEL_SUFFIX>, <$gmp_cv_asm_label_suffix>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_UNDERSCORE
dnl ------------------
dnl Determine whether global symbols need to be prefixed with an underscore.
dnl The output from "nm" is grepped to see what a typical symbol looks like.
dnl
dnl This test used to grep the .o file directly, but that failed with greps
dnl that don't like binary files (eg. SunOS 4).
dnl
dnl This test also used to construct an assembler file with and without an
dnl underscore and try to link that to a C file, to see which worked.
dnl Although that's what will happen in the real build we don't really want
dnl to depend on creating asm files within configure for every possible CPU
dnl (or at least we don't want to do that more than we have to).
dnl
dnl The fallback on no underscore is based on the assumption that the world
dnl is moving towards non-underscore systems. There should actually be no
dnl good reason for nm to fail though.
AC_DEFUN([GMP_ASM_UNDERSCORE],
[AC_REQUIRE([GMP_PROG_NM])
AC_CACHE_CHECK([if globals are prefixed by underscore],
gmp_cv_asm_underscore,
[gmp_cv_asm_underscore="unknown"
cat >conftest.c <<EOF
int gurkmacka;
EOF
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
$NM conftest.$OBJEXT >conftest.out
if grep _gurkmacka conftest.out >/dev/null; then
gmp_cv_asm_underscore=yes
elif grep gurkmacka conftest.out >/dev/null; then
gmp_cv_asm_underscore=no
else
echo "configure: $NM doesn't have gurkmacka:" >&AC_FD_CC
cat conftest.out >&AC_FD_CC
fi
else
echo "configure: failed program was:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
fi
rm -f conftest*
])
case $gmp_cv_asm_underscore in
yes)
GMP_DEFINE(GSYM_PREFIX, [_]) ;;
no)
GMP_DEFINE(GSYM_PREFIX, []) ;;
*)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| Cannot determine global symbol prefix.])
AC_MSG_WARN([| $NM output doesn't contain a global data symbol.])
AC_MSG_WARN([| Will proceed with no underscore.])
AC_MSG_WARN([| If this is wrong then you'll get link errors referring])
AC_MSG_WARN([| to ___gmpn_add_n (note three underscores).])
AC_MSG_WARN([| In this case do a fresh build with an override,])
AC_MSG_WARN([| ./configure gmp_cv_asm_underscore=yes])
AC_MSG_WARN([+----------------------------------------------------------])
GMP_DEFINE(GSYM_PREFIX, [])
;;
esac
])
dnl GMP_ASM_ALIGN_LOG
dnl -----------------
dnl Is parameter to `.align' logarithmic?
AC_DEFUN([GMP_ASM_ALIGN_LOG],
[AC_REQUIRE([GMP_ASM_GLOBL])
AC_REQUIRE([GMP_ASM_BYTE])
AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_PROG_NM])
AC_CACHE_CHECK([if .align assembly directive is logarithmic],
gmp_cv_asm_align_log,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
.align 4
$gmp_cv_asm_globl foo
$gmp_cv_asm_byte 1
.align 4
foo$gmp_cv_asm_label_suffix
$gmp_cv_asm_byte 2],
[gmp_tmp_val=[`$NM conftest.$OBJEXT | grep foo | \
sed -e 's;[[][0-9][]]\(.*\);\1;' -e 's;[^1-9]*\([0-9]*\).*;\1;'`]
if test "$gmp_tmp_val" = "10" || test "$gmp_tmp_val" = "16"; then
gmp_cv_asm_align_log=yes
else
gmp_cv_asm_align_log=no
fi],
[AC_MSG_ERROR([cannot assemble alignment test])])])
GMP_DEFINE_RAW(["define(<ALIGN_LOGARITHMIC>,<$gmp_cv_asm_align_log>)"])
])
dnl GMP_ASM_ALIGN_FILL_0x90
dnl -----------------------
dnl Determine whether a ",0x90" suffix works on a .align directive.
dnl This is only meant for use on x86, 0x90 being a "nop".
dnl
dnl Old gas, eg. 1.92.3
dnl Needs ",0x90" or else the fill is 0x00, which can't be executed
dnl across.
dnl
dnl New gas, eg. 2.91
dnl Generates multi-byte nop fills even when ",0x90" is given.
dnl
dnl Solaris 2.6 as
dnl ",0x90" is not allowed, causes a fatal error.
dnl
dnl Solaris 2.8 as
dnl ",0x90" does nothing, generates a warning that it's being ignored.
dnl
dnl SCO OpenServer 5 as
dnl Second parameter is max bytes to fill, not a fill pattern.
dnl ",0x90" is an error due to being bigger than the first parameter.
dnl Multi-byte nop fills are generated in text segments.
dnl
dnl Note that both solaris "as"s only care about ",0x90" if they actually
dnl have to use it to fill something, hence the .byte in the test. It's
dnl the second .align which provokes the error or warning.
dnl
dnl The warning from solaris 2.8 is suppressed to stop anyone worrying that
dnl something might be wrong.
AC_DEFUN([GMP_ASM_ALIGN_FILL_0x90],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the .align directive accepts an 0x90 fill in .text],
gmp_cv_asm_align_fill_0x90,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
.align 4, 0x90
.byte 0
.align 4, 0x90],
[if grep "Warning: Fill parameter ignored for executable section" conftest.out >/dev/null; then
echo "Suppressing this warning by omitting 0x90" 1>&AC_FD_CC
gmp_cv_asm_align_fill_0x90=no
else
gmp_cv_asm_align_fill_0x90=yes
fi],
[gmp_cv_asm_align_fill_0x90=no])])
GMP_DEFINE_RAW(["define(<ALIGN_FILL_0x90>,<$gmp_cv_asm_align_fill_0x90>)"])
])
dnl GMP_ASM_BYTE
dnl ------------
dnl .byte - is usual.
dnl data1 - required by ia64 (on hpux at least).
dnl
dnl This macro is just to support other configure tests, not any actual asm
dnl code.
AC_DEFUN([GMP_ASM_BYTE],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_CACHE_CHECK([for assembler byte directive],
gmp_cv_asm_byte,
[for i in .byte data1; do
echo "trying $i" >&AC_FD_CC
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
$i 0
],
[gmp_cv_asm_byte=$i
rm -f conftest*
break],
[cat conftest.out >&AC_FD_CC])
done
if test -z "$gmp_cv_asm_byte"; then
AC_MSG_ERROR([Cannot determine how to emit a data byte])
fi
])
])
dnl GMP_ASM_TEXT
dnl ------------
dnl .text - is usual.
dnl .code - is needed by the hppa on HP-UX (but ia64 HP-UX uses .text)
dnl .csect .text[PR] - is for AIX.
AC_DEFUN([GMP_ASM_TEXT],
[AC_CACHE_CHECK([how to switch to text section],
gmp_cv_asm_text,
[for i in ".text" ".code" [".csect .text[PR]"]; do
echo "trying $i" >&AC_FD_CC
GMP_TRY_ASSEMBLE([ $i],
[gmp_cv_asm_text=$i
rm -f conftest*
break])
done
if test -z "$gmp_cv_asm_text"; then
AC_MSG_ERROR([Cannot determine text section directive])
fi
])
echo ["define(<TEXT>, <$gmp_cv_asm_text>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_DATA
dnl ------------
dnl Can we say `.data'?
AC_DEFUN([GMP_ASM_DATA],
[AC_CACHE_CHECK([how to switch to data section],
gmp_cv_asm_data,
[case $host in
*-*-aix*) gmp_cv_asm_data=[".csect .data[RW]"] ;;
*) gmp_cv_asm_data=".data" ;;
esac
])
echo ["define(<DATA>, <$gmp_cv_asm_data>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_RODATA
dnl --------------
dnl Find out how to switch to the read-only data section.
dnl
dnl The compiler output is grepped for the right directive. It's not
dnl considered wise to just probe for ".section .rodata" or whatever works,
dnl since arbitrary section names might be accepted, but not necessarily do
dnl the right thing when they get to the linker.
dnl
dnl Only a few asm files use RODATA, so this code is perhaps a bit
dnl excessive right now, but should find more uses in the future.
dnl
dnl FIXME: gcc on aix generates something like ".csect _foo.ro_c[RO],3"
dnl where foo is the object file. Might need to check for that if we use
dnl RODATA there.
AC_DEFUN([GMP_ASM_RODATA],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_ASM_UNDERSCORE])
AC_CACHE_CHECK([how to switch to read-only data section],
gmp_cv_asm_rodata,
[
dnl Default to DATA on CPUs with split code/data caching, and TEXT
dnl elsewhere. i386 means generic x86, so use DATA on it.
case $host in
X86_PATTERN | x86_64-*-*)
gmp_cv_asm_rodata="$gmp_cv_asm_data" ;;
*)
gmp_cv_asm_rodata="$gmp_cv_asm_text" ;;
esac
cat >conftest.c <<EOF
extern const int foo[[]]; /* Suppresses C++'s suppression of foo */
const int foo[[]] = {1,2,3};
EOF
echo "Test program:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
gmp_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
echo "Compiler output:" >&AC_FD_CC
cat conftest.s >&AC_FD_CC
if test $gmp_cv_asm_underscore = yes; then
tmp_gsym_prefix=_
else
tmp_gsym_prefix=
fi
# must see our label
if grep "^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" conftest.s >/dev/null 2>&AC_FD_CC; then
# take the last directive before our label (hence skipping segments
# getting debugging info etc)
tmp_match=`sed -n ["/^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix/q
/^[. ]*data/p
/^[. ]*rdata/p
/^[. ]*text/p
/^[. ]*section/p
/^[. ]*csect/p
/^[. ]*CSECT/p"] conftest.s | sed -n '$p'`
echo "Match: $tmp_match" >&AC_FD_CC
if test -n "$tmp_match"; then
gmp_cv_asm_rodata=$tmp_match
fi
else
echo "Couldn't find label: ^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" >&AC_FD_CC
fi
fi
rm -f conftest*
])
echo ["define(<RODATA>, <$gmp_cv_asm_rodata>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_GLOBL
dnl -------------
dnl The assembler directive to mark a label as a global symbol.
dnl
dnl ia64 - .global is standard, according to the Intel documentation.
dnl
dnl hppa - ".export foo,entry" is demanded by HP hppa "as". ".global" is a
dnl kind of import.
dnl
dnl other - .globl is usual.
dnl
dnl "gas" tends to accept .globl everywhere, in addition to .export or
dnl .global or whatever the system assembler demands.
AC_DEFUN([GMP_ASM_GLOBL],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([for assembler global directive],
gmp_cv_asm_globl,
[case $host in
hppa*-*-*) gmp_cv_asm_globl=.export ;;
IA64_PATTERN) gmp_cv_asm_globl=.global ;;
*) gmp_cv_asm_globl=.globl ;;
esac
])
echo ["define(<GLOBL>, <$gmp_cv_asm_globl>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_GLOBL_ATTR
dnl ------------------
dnl Do we need something after `GLOBL symbol'?
AC_DEFUN([GMP_ASM_GLOBL_ATTR],
[AC_REQUIRE([GMP_ASM_GLOBL])
AC_CACHE_CHECK([for assembler global directive attribute],
gmp_cv_asm_globl_attr,
[case $gmp_cv_asm_globl in
.export) gmp_cv_asm_globl_attr=",entry" ;;
*) gmp_cv_asm_globl_attr="" ;;
esac
])
echo ["define(<GLOBL_ATTR>, <$gmp_cv_asm_globl_attr>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_TYPE
dnl ------------
dnl Can we say ".type", and how?
dnl
dnl For i386 GNU/Linux ELF systems, and very likely other ELF systems,
dnl .type and .size are important on functions in shared libraries. If
dnl .type is omitted and the mainline program references that function then
dnl the code will be copied down to the mainline at load time like a piece
dnl of data. If .size is wrong or missing (it defaults to 4 bytes or some
dnl such) then incorrect bytes will be copied and a segv is the most likely
dnl result. In any case such copying is not what's wanted, a .type
dnl directive will ensure a PLT entry is used.
dnl
dnl In GMP the assembler functions are normally only used from within the
dnl library (since most programs are not interested in the low level
dnl routines), and in those circumstances a missing .type isn't fatal,
dnl letting the problem go unnoticed. tests/mpn/t-asmtype.c aims to check
dnl for it.
AC_DEFUN([GMP_ASM_TYPE],
[AC_CACHE_CHECK([for assembler .type directive],
gmp_cv_asm_type,
[gmp_cv_asm_type=
for gmp_tmp_prefix in @ \# %; do
GMP_TRY_ASSEMBLE([ .type sym,${gmp_tmp_prefix}function],
[if grep "\.type pseudo-op used outside of \.def/\.endef ignored" conftest.out >/dev/null; then : ;
else
gmp_cv_asm_type=".type \$][1,${gmp_tmp_prefix}\$][2"
break
fi])
done
rm -f conftest*
])
echo ["define(<TYPE>, <$gmp_cv_asm_type>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_SIZE
dnl ------------
dnl Can we say `.size'?
AC_DEFUN([GMP_ASM_SIZE],
[AC_CACHE_CHECK([for assembler .size directive],
gmp_cv_asm_size,
[gmp_cv_asm_size=
GMP_TRY_ASSEMBLE([ .size sym,1],
[if grep "\.size pseudo-op used outside of \.def/\.endef ignored" conftest.out >/dev/null; then : ;
else
gmp_cv_asm_size=".size \$][1,\$][2"
fi])
])
echo ["define(<SIZE>, <$gmp_cv_asm_size>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_COFF_TYPE
dnl -----------------
dnl Determine whether the assembler supports COFF type information.
dnl
dnl Currently this is only needed for mingw (and cygwin perhaps) and so is
dnl run only on the x86s, but it ought to work anywhere.
dnl
dnl On MINGW, recent versions of the linker have an automatic import scheme
dnl for data in a DLL which is referenced by a mainline but without
dnl __declspec (__dllimport__) on the prototype. It seems functions
dnl without type information are treated as data, or something, and calls
dnl to them from the mainline will crash. gcc puts type information on the
dnl C functions it generates, we need to do the same for assembler
dnl functions.
dnl
dnl This applies only to functions without __declspec(__dllimport__),
dnl ie. without __GMP_DECLSPEC in the case of libgmp, so it also works just
dnl to ensure all assembler functions used from outside libgmp have
dnl __GMP_DECLSPEC on their prototypes. But this isn't an ideal situation,
dnl since we don't want perfectly valid calls going wrong just because
dnl there wasn't a prototype in scope.
dnl
dnl When an auto-import takes place, the following warning is given by the
dnl linker. This shouldn't be seen for any functions.
dnl
dnl Info: resolving _foo by linking to __imp__foo (auto-import)
dnl
dnl
dnl COFF type directives look like the following
dnl
dnl .def _foo
dnl .scl 2
dnl .type 32
dnl .endef
dnl
dnl _foo is the symbol with GSYM_PREFIX (_). .scl is the storage class, 2
dnl for external, 3 for static. .type is the object type, 32 for a
dnl function.
dnl
dnl On an ELF system, this is (correctly) rejected due to .def, .endef and
dnl .scl being invalid, and .type not having enough arguments.
AC_DEFUN([GMP_ASM_COFF_TYPE],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_GLOBL])
AC_REQUIRE([GMP_ASM_GLOBL_ATTR])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_ASM_UNDERSCORE])
AC_CACHE_CHECK([for assembler COFF type directives],
gmp_cv_asm_x86_coff_type,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
$gmp_cv_asm_globl ${tmp_gsym_prefix}foo$gmp_cv_asm_globl_attr
.def ${tmp_gsym_prefix}foo
.scl 2
.type 32
.endef
${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix
],
[gmp_cv_asm_x86_coff_type=yes],
[gmp_cv_asm_x86_coff_type=no])
])
echo ["define(<HAVE_COFF_TYPE>, <$gmp_cv_asm_x86_coff_type>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_LSYM_PREFIX
dnl -------------------
dnl What is the prefix for a local label?
dnl
dnl The prefixes tested are,
dnl
dnl L - usual for underscore systems
dnl .L - usual for non-underscore systems
dnl $ - alpha (gas and OSF system assembler)
dnl L$ - hppa (gas and HP-UX system assembler)
dnl
dnl The default is "L" if the tests fail for any reason. There's a good
dnl chance this will be adequate, since on most systems labels are local
dnl anyway unless given a ".globl", and an "L" will avoid clashes with
dnl other identifers.
dnl
dnl For gas, ".L" is normally purely local to the assembler, it doesn't get
dnl put into the object file at all. This style is preferred, to keep the
dnl object files nice and clean.
dnl
dnl BSD format nm produces a line like
dnl
dnl 00000000 t Lgurkmacka
dnl
dnl The symbol code is normally "t" for text, but any lower case letter
dnl indicates a local definition.
dnl
dnl Code "n" is for a debugging symbol, OSF "nm -B" gives that as an upper
dnl case "N" for a local.
dnl
dnl HP-UX nm prints an error message (though seems to give a 0 exit) if
dnl there's no symbols at all in an object file, hence the use of "dummy".
AC_DEFUN([GMP_ASM_LSYM_PREFIX],
[AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_PROG_NM])
AC_CACHE_CHECK([for assembler local label prefix],
gmp_cv_asm_lsym_prefix,
[gmp_tmp_pre_appears=yes
for gmp_tmp_pre in L .L $L $ L$; do
echo "Trying $gmp_tmp_pre" >&AC_FD_CC
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
dummy${gmp_cv_asm_label_suffix}
${gmp_tmp_pre}gurkmacka${gmp_cv_asm_label_suffix}],
[if $NM conftest.$OBJEXT >conftest.nm 2>&AC_FD_CC; then : ; else
cat conftest.nm >&AC_FD_CC
AC_MSG_WARN(["$NM" failure])
break
fi
cat conftest.nm >&AC_FD_CC
if grep gurkmacka conftest.nm >/dev/null; then : ; else
# no mention of the symbol, this is good
echo "$gmp_tmp_pre label doesn't appear in object file at all (good)" >&AC_FD_CC
gmp_cv_asm_lsym_prefix="$gmp_tmp_pre"
gmp_tmp_pre_appears=no
break
fi
if grep [' [a-zN] .*gurkmacka'] conftest.nm >/dev/null; then
# symbol mentioned as a local, use this if nothing better
echo "$gmp_tmp_pre label is local but still in object file" >&AC_FD_CC
if test -z "$gmp_cv_asm_lsym_prefix"; then
gmp_cv_asm_lsym_prefix="$gmp_tmp_pre"
fi
else
echo "$gmp_tmp_pre label is something unknown" >&AC_FD_CC
fi
])
done
rm -f conftest*
if test -z "$gmp_cv_asm_lsym_prefix"; then
gmp_cv_asm_lsym_prefix=L
AC_MSG_WARN([cannot determine local label, using default $gmp_cv_asm_lsym_prefix])
fi
# for development purposes, note whether we got a purely temporary local label
echo "Local label appears in object files: $gmp_tmp_pre_appears" >&AC_FD_CC
])
echo ["define(<LSYM_PREFIX>, <${gmp_cv_asm_lsym_prefix}>)"] >> $gmp_tmpconfigm4
AC_DEFINE_UNQUOTED(LSYM_PREFIX, "$gmp_cv_asm_lsym_prefix",
[Assembler local label prefix])
])
dnl GMP_ASM_W32
dnl -----------
dnl How to define a 32-bit word.
dnl
dnl FIXME: This test is not right for ia64-*-hpux*. The directive should
dnl be "data4", but the W32 macro is not currently used by the mpn/ia64 asm
dnl files.
AC_DEFUN([GMP_ASM_W32],
[AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_BYTE])
AC_REQUIRE([GMP_ASM_GLOBL])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_PROG_NM])
AC_CACHE_CHECK([how to define a 32-bit word],
gmp_cv_asm_w32,
[case $host in
*-*-hpux*)
# FIXME: HPUX puts first symbol at 0x40000000, breaking our assumption
# that it's at 0x0. We'll have to declare another symbol before the
# .long/.word and look at the distance between the two symbols. The
# only problem is that the sed expression(s) barfs (on Solaris, for
# example) for the symbol with value 0. For now, HPUX uses .word.
gmp_cv_asm_w32=".word"
;;
*-*-*)
gmp_tmp_val=
for gmp_tmp_op in .long .word data4; do
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
$gmp_cv_asm_globl foo
$gmp_tmp_op 0
foo$gmp_cv_asm_label_suffix
$gmp_cv_asm_byte 0],
[gmp_tmp_val=[`$NM conftest.$OBJEXT | grep foo | \
sed -e 's;[[][0-9][]]\(.*\);\1;' -e 's;[^1-9]*\([0-9]*\).*;\1;'`]
if test "$gmp_tmp_val" = 4; then
gmp_cv_asm_w32="$gmp_tmp_op"
break
fi])
done
rm -f conftest*
;;
esac
if test -z "$gmp_cv_asm_w32"; then
AC_MSG_ERROR([cannot determine how to define a 32-bit word])
fi
])
echo ["define(<W32>, <$gmp_cv_asm_w32>)"] >> $gmp_tmpconfigm4
])
dnl GMP_X86_ASM_GOT_UNDERSCORE
dnl --------------------------
dnl Determine whether i386 _GLOBAL_OFFSET_TABLE_ needs an additional
dnl underscore prefix.
dnl
dnl SVR4 - the standard is _GLOBAL_OFFSET_TABLE_
dnl GNU/Linux - follows SVR4
dnl OpenBSD - an a.out underscore system, uses __GLOBAL_OFFSET_TABLE_
dnl NetBSD - also an a.out underscore system, but _GLOBAL_OFFSET_TABLE_
dnl
dnl The test attempts to link a program using _GLOBAL_OFFSET_TABLE_ or
dnl __GLOBAL_OFFSET_TABLE_ to see which works.
dnl
dnl $lt_prog_compiler_pic is included in the compile because old versions
dnl of gas wouldn't accept PIC idioms without the right option (-K). This
dnl is the same as what libtool and mpn/Makeasm.am will do.
dnl
dnl $lt_prog_compiler_pic is also included in the link because OpenBSD ld
dnl won't accept an R_386_GOTPC relocation without the right options. This
dnl is not what's done by the Makefiles when building executables, but
dnl let's hope it's ok (it works fine with gcc).
dnl
dnl The fallback is no additional underscore, on the basis that this will
dnl suit SVR4/ELF style systems, which should be much more common than
dnl a.out systems with shared libraries.
dnl
dnl Note that it's not an error for the tests to fail, since for instance
dnl cygwin, mingw and djgpp don't have a _GLOBAL_OFFSET_TABLE_ scheme at
dnl all.
dnl
dnl Perhaps $CCAS could be asked to do the linking as well as the
dnl assembling, but in the Makefiles it's only used for assembling, so lets
dnl keep it that way.
dnl
dnl The test here is run even under --disable-shared, so that PIC objects
dnl can be built and tested by the tune/many.pl development scheme. The
dnl tests will be reasonably quick and won't give a fatal error, so this
dnl arrangement is ok. AC_LIBTOOL_PROG_COMPILER_PIC does its
dnl $lt_prog_compiler_pic setups even for --disable-shared too.
AC_DEFUN([GMP_ASM_X86_GOT_UNDERSCORE],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_GLOBL])
AC_REQUIRE([GMP_ASM_GLOBL_ATTR])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_ASM_UNDERSCORE])
AC_REQUIRE([AC_LIBTOOL_PROG_COMPILER_PIC])
AC_CACHE_CHECK([if _GLOBAL_OFFSET_TABLE_ is prefixed by underscore],
gmp_cv_asm_x86_got_underscore,
[gmp_cv_asm_x86_got_underscore="not applicable"
if test $gmp_cv_asm_underscore = yes; then
tmp_gsym_prefix=_
else
tmp_gsym_prefix=
fi
for tmp_underscore in "" "_"; do
cat >conftest.s <<EOF
$gmp_cv_asm_text
$gmp_cv_asm_globl ${tmp_gsym_prefix}main$gmp_cv_asm_globl_attr
${tmp_gsym_prefix}main$gmp_cv_asm_label_suffix
addl $ ${tmp_underscore}_GLOBAL_OFFSET_TABLE_, %ebx
EOF
gmp_compile="$CCAS $CFLAGS $CPPFLAGS $lt_prog_compiler_pic conftest.s >&AC_FD_CC && $CC $CFLAGS $CPPFLAGS $lt_prog_compiler_pic conftest.$OBJEXT >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
if test "$tmp_underscore" = "_"; then
gmp_cv_asm_x86_got_underscore=yes
else
gmp_cv_asm_x86_got_underscore=no
fi
break
fi
done
rm -f conftest* a.out b.out a.exe a_out.exe
])
if test "$gmp_cv_asm_x86_got_underscore" = "yes"; then
GMP_DEFINE(GOT_GSYM_PREFIX, [_])
else
GMP_DEFINE(GOT_GSYM_PREFIX, [])
fi
])
dnl GMP_ASM_X86_GOT_EAX_OK(CC+CFLAGS, [ACTION-YES] [, ACTION-NO])
dnl -------------------------------------------------------------
dnl Determine whether _GLOBAL_OFFSET_TABLE_ used with %eax is ok.
dnl
dnl An instruction
dnl
dnl addl $_GLOBAL_OFFSET_TABLE_, %eax
dnl
dnl is incorrectly assembled by gas 2.12 (or thereabouts) and earlier. It
dnl puts an addend 2 into the R_386_GOTPC relocation, but it should be 1
dnl for this %eax form being a 1 byte opcode (with other registers it's 2
dnl opcode bytes). See note about this in mpn/x86/README too.
dnl
dnl We assemble this, surrounded by some unlikely byte sequences as
dnl delimiters, and check for the bad output.
dnl
dnl This is for use by compiler probing in GMP_PROG_CC_WORKS, so the result
dnl is not cached.
dnl
dnl This test is not specific to gas, but old gas is the only assembler we
dnl know of with this problem. The Solaris has been seen coming out ok.
dnl
dnl ".text" is hard coded because this macro is wanted before GMP_ASM_TEXT.
dnl This should be fine, ".text" is normal on x86 systems, and certainly
dnl will be fine with the offending gas.
dnl
dnl If an error occurs when assembling, we consider the assembler ok, since
dnl the bad output does not occur. This happens for instance on mingw,
dnl where _GLOBAL_OFFSET_TABLE_ results in a bfd error, since there's no
dnl GOT etc in PE object files.
dnl
dnl This test is used before the object file extension has been determined,
dnl so we force output to conftest.o. Using -o with -c is not portable,
dnl but we think all x86 compilers will accept -o with -c, certainly gcc
dnl does.
dnl
dnl -fPIC is hard coded here, because this test is for use before libtool
dnl has established the pic options. It's right for gcc, but perhaps not
dnl other compilers.
AC_DEFUN([GMP_ASM_X86_GOT_EAX_OK],
[echo "Testing gas GOT with eax good" >&AC_FD_CC
cat >conftest.awk <<\EOF
[BEGIN {
want[0] = "001"
want[1] = "043"
want[2] = "105"
want[3] = "147"
want[4] = "211"
want[5] = "253"
want[6] = "315"
want[7] = "357"
want[8] = "005"
want[9] = "002"
want[10] = "000"
want[11] = "000"
want[12] = "000"
want[13] = "376"
want[14] = "334"
want[15] = "272"
want[16] = "230"
want[17] = "166"
want[18] = "124"
want[19] = "062"
want[20] = "020"
result = "yes"
}
{
for (f = 2; f <= NF; f++)
{
for (i = 0; i < 20; i++)
got[i] = got[i+1];
got[20] = $f;
found = 1
for (i = 0; i < 21; i++)
if (got[i] != want[i])
{
found = 0
break
}
if (found)
{
result = "no"
exit
}
}
}
END {
print result
}
]EOF
cat >conftest.s <<\EOF
[ .text
.byte 1, 35, 69, 103, 137, 171, 205, 239
addl $_GLOBAL_OFFSET_TABLE_, %eax
.byte 254, 220, 186, 152, 118, 84, 50, 16
]EOF
tmp_got_good=yes
gmp_compile="$1 -fPIC -o conftest.o -c conftest.s >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(gmp_compile); then
tmp_got_good=`od -b conftest.o | $AWK -f conftest.awk`
fi
rm -f conftest.*
echo "Result: $tmp_got_good" >&AC_FD_CC
if test "$tmp_got_good" = no; then
ifelse([$3],,:,[$3])
else
ifelse([$2],,:,[$2])
fi
])
dnl GMP_ASM_X86_MMX([ACTION-IF-YES][,ACTION-IF-NO])
dnl -----------------------------------------------
dnl Determine whether the assembler supports MMX instructions.
dnl
dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded
dnl here. ".text" is believed to be correct on all x86 systems. Actually
dnl ".text" probably isn't needed at all, at least for just checking
dnl instruction syntax.
dnl
dnl "movq %mm0, %mm1" should assemble to "0f 6f c8", but Solaris 2.6 and
dnl 2.7 wrongly assemble it to "0f 6f c1" (that being the reverse "movq
dnl %mm1, %mm0"). It seems more trouble than it's worth to work around
dnl this in the code, so just detect and reject.
AC_DEFUN([GMP_ASM_X86_MMX],
[AC_CACHE_CHECK([if the assembler knows about MMX instructions],
gmp_cv_asm_x86_mmx,
[GMP_TRY_ASSEMBLE(
[ .text
movq %mm0, %mm1],
[gmp_cv_asm_x86_mmx=yes
case $host in
*-*-solaris*)
if (dis conftest.$OBJEXT >conftest.out) 2>/dev/null; then
if grep "0f 6f c1" conftest.out >/dev/null; then
gmp_cv_asm_x86_mmx=movq-bug
fi
else
AC_MSG_WARN(["dis" not available to check for "as" movq bug])
fi
esac],
[gmp_cv_asm_x86_mmx=no])])
case $gmp_cv_asm_x86_mmx in
movq-bug)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| WARNING WARNING WARNING])
AC_MSG_WARN([| Host CPU has MMX code, but the assembler])
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
AC_MSG_WARN([| has the Solaris 2.6 and 2.7 bug where register to register])
AC_MSG_WARN([| movq operands are reversed.])
AC_MSG_WARN([| Non-MMX replacements will be used.])
AC_MSG_WARN([| This will be an inferior build.])
AC_MSG_WARN([+----------------------------------------------------------])
;;
no)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| WARNING WARNING WARNING])
AC_MSG_WARN([| Host CPU has MMX code, but it can't be assembled by])
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
AC_MSG_WARN([| Non-MMX replacements will be used.])
AC_MSG_WARN([| This will be an inferior build.])
AC_MSG_WARN([+----------------------------------------------------------])
;;
esac
if test "$gmp_cv_asm_x86_mmx" = yes; then
ifelse([$1],,:,[$1])
else
ifelse([$2],,:,[$2])
fi
])
dnl GMP_ASM_X86_SHLDL_CL
dnl --------------------
AC_DEFUN([GMP_ASM_X86_SHLDL_CL],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the assembler takes cl with shldl],
gmp_cv_asm_x86_shldl_cl,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
shldl %cl, %eax, %ebx],
gmp_cv_asm_x86_shldl_cl=yes,
gmp_cv_asm_x86_shldl_cl=no)
])
if test "$gmp_cv_asm_x86_shldl_cl" = "yes"; then
GMP_DEFINE(WANT_SHLDL_CL,1)
else
GMP_DEFINE(WANT_SHLDL_CL,0)
fi
])
dnl GMP_ASM_X86_SSE2([ACTION-IF-YES][,ACTION-IF-NO])
dnl ------------------------------------------------
dnl Determine whether the assembler supports SSE2 instructions.
dnl
dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded
dnl here. ".text" is believed to be correct on all x86 systems, certainly
dnl it's all GMP_ASM_TEXT gives currently. Actually ".text" probably isn't
dnl needed at all, at least for just checking instruction syntax.
AC_DEFUN([GMP_ASM_X86_SSE2],
[AC_CACHE_CHECK([if the assembler knows about SSE2 instructions],
gmp_cv_asm_x86_sse2,
[GMP_TRY_ASSEMBLE(
[ .text
paddq %mm0, %mm1],
[gmp_cv_asm_x86_sse2=yes],
[gmp_cv_asm_x86_sse2=no])
])
case $gmp_cv_asm_x86_sse2 in
yes)
ifelse([$1],,:,[$1])
;;
*)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| WARNING WARNING WARNING])
AC_MSG_WARN([| Host CPU has SSE2 code, but it can't be assembled by])
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
AC_MSG_WARN([| Non-SSE2 replacements will be used.])
AC_MSG_WARN([| This will be an inferior build.])
AC_MSG_WARN([+----------------------------------------------------------])
ifelse([$2],,:,[$2])
;;
esac
])
dnl GMP_ASM_X86_MULX([ACTION-IF-YES][,ACTION-IF-NO])
dnl ------------------------------------------------
dnl Determine whether the assembler supports the mulx instruction which debut
dnl with Haswell.
dnl
dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded
dnl here. ".text" is believed to be correct on all x86 systems, certainly
dnl it's all GMP_ASM_TEXT gives currently. Actually ".text" probably isn't
dnl needed at all, at least for just checking instruction syntax.
AC_DEFUN([GMP_ASM_X86_MULX],
[AC_CACHE_CHECK([if the assembler knows about the mulx instruction],
gmp_cv_asm_x86_mulx,
[GMP_TRY_ASSEMBLE(
[ .text
mulx %r8, %r9, %r10],
[gmp_cv_asm_x86_mulx=yes],
[gmp_cv_asm_x86_mulx=no])
])
case $gmp_cv_asm_x86_mulx in
yes)
ifelse([$1],,:,[$1])
;;
*)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| WARNING WARNING WARNING])
AC_MSG_WARN([| Host CPU has the mulx instruction, but it can't be])
AC_MSG_WARN([| assembled by])
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
AC_MSG_WARN([| Older x86 instructions will be used.])
AC_MSG_WARN([| This will be an inferior build.])
AC_MSG_WARN([+----------------------------------------------------------])
ifelse([$2],,:,[$2])
;;
esac
])
dnl GMP_ASM_X86_ADX([ACTION-IF-YES][,ACTION-IF-NO])
dnl ------------------------------------------------
dnl Determine whether the assembler supports the adcx and adox instructions
dnl which debut with the Haswell shrink Broadwell.
dnl
dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded
dnl here. ".text" is believed to be correct on all x86 systems, certainly
dnl it's all GMP_ASM_TEXT gives currently. Actually ".text" probably isn't
dnl needed at all, at least for just checking instruction syntax.
AC_DEFUN([GMP_ASM_X86_ADX],
[AC_CACHE_CHECK([if the assembler knows about the adox instruction],
gmp_cv_asm_x86_adx,
[GMP_TRY_ASSEMBLE(
[ .text
adox %r8, %r9
adcx %r8, %r9],
[gmp_cv_asm_x86_adx=yes],
[gmp_cv_asm_x86_adx=no])
])
case $gmp_cv_asm_x86_adx in
yes)
ifelse([$1],,:,[$1])
;;
*)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| WARNING WARNING WARNING])
AC_MSG_WARN([| Host CPU has the adcx and adox instructions, but they])
AC_MSG_WARN([| can't be assembled by])
AC_MSG_WARN([| $CCAS $CFLAGS $CPPFLAGS])
AC_MSG_WARN([| Older x86 instructions will be used.])
AC_MSG_WARN([| This will be an inferior build.])
AC_MSG_WARN([+----------------------------------------------------------])
ifelse([$2],,:,[$2])
;;
esac
])
dnl GMP_ASM_X86_MCOUNT
dnl ------------------
dnl Find out how to call mcount for profiling on an x86 system.
dnl
dnl A dummy function is compiled and the ".s" output examined. The pattern
dnl matching might be a bit fragile, but should work at least with gcc on
dnl sensible systems. Certainly it's better than hard coding a table of
dnl conventions.
dnl
dnl For non-PIC, any ".data" is taken to mean a counter might be passed.
dnl It's assumed a movl will set it up, and the right register is taken
dnl from that movl. Any movl involving %esp is ignored (a frame pointer
dnl setup normally).
dnl
dnl For PIC, any ".data" is similarly interpreted, but a GOTOFF identifies
dnl the line setting up the right register.
dnl
dnl In both cases a line with "mcount" identifies the call and that line is
dnl used literally.
dnl
dnl On some systems (eg. FreeBSD 3.5) gcc emits ".data" but doesn't use it,
dnl so it's not an error to have .data but then not find a register.
dnl
dnl Variations in mcount conventions on different x86 systems can be found
dnl in gcc config/i386. mcount can have a "_" prefix or be .mcount or
dnl _mcount_ptr, and for PIC it can be called through a GOT entry, or via
dnl the PLT. If a pointer to a counter is required it's passed in %eax or
dnl %edx.
dnl
dnl Flags to specify PIC are taken from $lt_prog_compiler_pic set by
dnl AC_PROG_LIBTOOL.
dnl
dnl Enhancement: Cache the values determined here. But what's the right way
dnl to get two variables (mcount_nonpic_reg and mcount_nonpic_call say) set
dnl from one block of commands?
AC_DEFUN([GMP_ASM_X86_MCOUNT],
[AC_REQUIRE([AC_ENABLE_SHARED])
AC_REQUIRE([AC_PROG_LIBTOOL])
AC_MSG_CHECKING([how to call x86 mcount])
cat >conftest.c <<EOF
foo(){bar();}
EOF
if test "$enable_static" = yes; then
gmp_asmout_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c 1>&AC_FD_CC"
if AC_TRY_EVAL(gmp_asmout_compile); then
if grep '\.data' conftest.s >/dev/null; then
mcount_nonpic_reg=`sed -n ['/esp/!s/.*movl.*,\(%[a-z]*\).*$/\1/p'] conftest.s`
else
mcount_nonpic_reg=
fi
mcount_nonpic_call=`grep 'call.*mcount' conftest.s`
if test -z "$mcount_nonpic_call"; then
AC_MSG_ERROR([Cannot find mcount call for non-PIC])
fi
else
AC_MSG_ERROR([Cannot compile test program for non-PIC])
fi
fi
if test "$enable_shared" = yes; then
gmp_asmout_compile="$CC $CFLAGS $CPPFLAGS $lt_prog_compiler_pic -S conftest.c 1>&AC_FD_CC"
if AC_TRY_EVAL(gmp_asmout_compile); then
if grep '\.data' conftest.s >/dev/null; then
case $lt_prog_compiler_pic in
*-DDLL_EXPORT*)
# Windows DLLs have non-PIC style mcount
mcount_pic_reg=`sed -n ['/esp/!s/.*movl.*,\(%[a-z]*\).*$/\1/p'] conftest.s`
;;
*)
mcount_pic_reg=`sed -n ['s/.*GOTOFF.*,\(%[a-z]*\).*$/\1/p'] conftest.s`
;;
esac
else
mcount_pic_reg=
fi
mcount_pic_call=`grep 'call.*mcount' conftest.s`
if test -z "$mcount_pic_call"; then
AC_MSG_ERROR([Cannot find mcount call for PIC])
fi
else
AC_MSG_ERROR([Cannot compile test program for PIC])
fi
fi
GMP_DEFINE_RAW(["define(<MCOUNT_NONPIC_REG>, <\`$mcount_nonpic_reg'>)"])
GMP_DEFINE_RAW(["define(<MCOUNT_NONPIC_CALL>,<\`$mcount_nonpic_call'>)"])
GMP_DEFINE_RAW(["define(<MCOUNT_PIC_REG>, <\`$mcount_pic_reg'>)"])
GMP_DEFINE_RAW(["define(<MCOUNT_PIC_CALL>, <\`$mcount_pic_call'>)"])
rm -f conftest.*
AC_MSG_RESULT([determined])
])
dnl GMP_ASM_IA64_ALIGN_OK
dnl ---------------------
dnl Determine whether .align correctly pads with nop instructions in a text
dnl segment.
dnl
dnl gas 2.14 and earlier byte swaps its padding bundle on big endian
dnl systems, which is incorrect (endianness only changes data). What
dnl should be "nop.m / nop.f / nop.i" comes out as "break" instructions.
dnl
dnl The test here detects the bad case, and assumes anything else is ok
dnl (there are many sensible nop bundles, so it'd be impractical to try to
dnl match everything good).
AC_DEFUN([GMP_ASM_IA64_ALIGN_OK],
[AC_CACHE_CHECK([whether assembler .align padding is good],
gmp_cv_asm_ia64_align_ok,
[cat >conftest.awk <<\EOF
[BEGIN {
want[0] = "011"
want[1] = "160"
want[2] = "074"
want[3] = "040"
want[4] = "000"
want[5] = "040"
want[6] = "020"
want[7] = "221"
want[8] = "114"
want[9] = "000"
want[10] = "100"
want[11] = "200"
want[12] = "122"
want[13] = "261"
want[14] = "000"
want[15] = "200"
want[16] = "000"
want[17] = "004"
want[18] = "000"
want[19] = "000"
want[20] = "000"
want[21] = "000"
want[22] = "002"
want[23] = "000"
want[24] = "000"
want[25] = "000"
want[26] = "000"
want[27] = "001"
want[28] = "000"
want[29] = "000"
want[30] = "000"
want[31] = "014"
want[32] = "011"
want[33] = "270"
want[34] = "140"
want[35] = "062"
want[36] = "000"
want[37] = "040"
want[38] = "240"
want[39] = "331"
want[40] = "160"
want[41] = "000"
want[42] = "100"
want[43] = "240"
want[44] = "343"
want[45] = "371"
want[46] = "000"
want[47] = "200"
result = "yes"
}
{
for (f = 2; f <= NF; f++)
{
for (i = 0; i < 47; i++)
got[i] = got[i+1];
got[47] = $f;
found = 1
for (i = 0; i < 48; i++)
if (got[i] != want[i])
{
found = 0
break
}
if (found)
{
result = "no"
exit
}
}
}
END {
print result
}
]EOF
GMP_TRY_ASSEMBLE(
[ .text
.align 32
{ .mmi; add r14 = r15, r16
add r17 = r18, r19
add r20 = r21, r22 ;; }
.align 32
{ .mmi; add r23 = r24, r25
add r26 = r27, r28
add r29 = r30, r31 ;; }
],
[gmp_cv_asm_ia64_align_ok=`od -b conftest.$OBJEXT | $AWK -f conftest.awk`],
[AC_MSG_WARN([oops, cannot compile test program])
gmp_cv_asm_ia64_align_ok=yes])
])
GMP_DEFINE_RAW(["define(<IA64_ALIGN_OK>, <\`$gmp_cv_asm_ia64_align_ok'>)"])
])
dnl GMP_ASM_M68K_INSTRUCTION
dnl ------------------------
dnl Not sure if ".l" and "%" are independent settings, but it doesn't hurt
dnl to try all four possibilities. Note that the % ones must be first, so
dnl "d0" won't be interpreted as a label.
dnl
dnl gas 1.92.3 on NetBSD 1.4 needs to be tested with a two operand
dnl instruction. It takes registers without "%", but a single operand
dnl "clrl %d0" only gives a warning, not an error.
AC_DEFUN([GMP_ASM_M68K_INSTRUCTION],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([assembler instruction and register style],
gmp_cv_asm_m68k_instruction,
[for i in "addl %d0,%d1" "add.l %d0,%d1" "addl d0,d1" "add.l d0,d1"; do
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
$i],
[gmp_cv_asm_m68k_instruction=$i
rm -f conftest*
break])
done
if test -z "$gmp_cv_asm_m68k_instruction"; then
AC_MSG_ERROR([cannot determine assembler instruction and register style])
fi
])
case $gmp_cv_asm_m68k_instruction in
"addl d0,d1") want_dot_size=no; want_register_percent=no ;;
"addl %d0,%d1") want_dot_size=no; want_register_percent=yes ;;
"add.l d0,d1") want_dot_size=yes; want_register_percent=no ;;
"add.l %d0,%d1") want_dot_size=yes; want_register_percent=yes ;;
*) AC_MSG_ERROR([oops, unrecognised instruction and register style]) ;;
esac
GMP_DEFINE_RAW(["define(<WANT_REGISTER_PERCENT>, <\`$want_register_percent'>)"])
GMP_DEFINE_RAW(["define(<WANT_DOT_SIZE>, <\`$want_dot_size'>)"])
])
dnl GMP_ASM_M68K_ADDRESSING
dnl -----------------------
AC_DEFUN([GMP_ASM_M68K_ADDRESSING],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_M68K_INSTRUCTION])
AC_CACHE_CHECK([assembler addressing style],
gmp_cv_asm_m68k_addressing,
[case $gmp_cv_asm_m68k_instruction in
addl*) movel=movel ;;
add.l*) movel=move.l ;;
*) AC_MSG_ERROR([oops, unrecognised gmp_cv_asm_m68k_instruction]) ;;
esac
case $gmp_cv_asm_m68k_instruction in
*"%d0,%d1") dreg=%d0; areg=%a0 ;;
*"d0,d1") dreg=d0; areg=a0 ;;
*) AC_MSG_ERROR([oops, unrecognised gmp_cv_asm_m68k_instruction]) ;;
esac
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
$movel $dreg, $areg@-],
[gmp_cv_asm_m68k_addressing=mit],
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
$movel $dreg, -($areg)],
[gmp_cv_asm_m68k_addressing=motorola],
[AC_MSG_ERROR([cannot determine assembler addressing style])])])
])
GMP_DEFINE_RAW(["define(<WANT_ADDRESSING>, <\`$gmp_cv_asm_m68k_addressing'>)"])
])
dnl GMP_ASM_M68K_BRANCHES
dnl ---------------------
dnl "bra" is the standard branch instruction. "jra" or "jbra" are
dnl preferred where available, since on gas for instance they give a
dnl displacement only as big as it needs to be, whereas "bra" is always
dnl 16-bits. This applies to the conditional branches "bcc" etc too.
dnl However "dbcc" etc on gas are already only as big as they need to be.
AC_DEFUN([GMP_ASM_M68K_BRANCHES],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([assembler shortest branches],
gmp_cv_asm_m68k_branches,
[for i in jra jbra bra; do
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
foo$gmp_cv_asm_label_suffix
$i foo],
[gmp_cv_asm_m68k_branches=$i
rm -f conftest*
break])
done
if test -z "$gmp_cv_asm_m68k_branches"; then
AC_MSG_ERROR([cannot determine assembler branching style])
fi
])
GMP_DEFINE_RAW(["define(<WANT_BRANCHES>, <\`$gmp_cv_asm_m68k_branches'>)"])
])
dnl GMP_ASM_POWERPC_PIC_ALWAYS
dnl --------------------------
dnl Determine whether PIC is the default compiler output.
dnl
dnl SVR4 style "foo@ha" addressing is interpreted as non-PIC, and anything
dnl else is assumed to require PIC always (Darwin or AIX). SVR4 is the
dnl only non-PIC addressing syntax the asm files have at the moment anyway.
dnl
dnl Libtool does this by taking "*-*-aix* | *-*-darwin* | *-*-rhapsody*" to
dnl mean PIC always, but it seems more reliable to grep the compiler
dnl output.
dnl
dnl The next paragraph is untrue for Tiger. Was it ever true? For tiger,
dnl "cc -fast" makes non-PIC the default (and the binaries do run).
dnl On Darwin "cc -static" is non-PIC with syntax "ha16(_foo)", but that's
dnl apparently only for use in the kernel, which we're not attempting to
dnl target at the moment, so don't look for that.
AC_DEFUN([GMP_ASM_POWERPC_PIC_ALWAYS],
[AC_REQUIRE([AC_PROG_CC])
AC_CACHE_CHECK([whether compiler output is PIC by default],
gmp_cv_asm_powerpc_pic,
[gmp_cv_asm_powerpc_pic=yes
cat >conftest.c <<EOF
int foo;
int *bar() { return &foo; }
EOF
echo "Test program:" >&AC_FD_CC
cat conftest.c >&AC_FD_CC
gmp_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c >&AC_FD_CC"
if AC_TRY_EVAL(gmp_compile); then
echo "Compiler output:" >&AC_FD_CC
cat conftest.s >&AC_FD_CC
if grep 'foo@ha' conftest.s >/dev/null 2>&AC_FD_CC; then
gmp_cv_asm_powerpc_pic=no
fi
if grep 'ha16(_foo)' conftest.s >/dev/null 2>&AC_FD_CC; then
gmp_cv_asm_powerpc_pic=no
fi
fi
rm -f conftest*
])
GMP_DEFINE_RAW(["define(<PIC_ALWAYS>,<$gmp_cv_asm_powerpc_pic>)"])
])
dnl GMP_ASM_POWERPC_R_REGISTERS
dnl ---------------------------
dnl Determine whether the assembler takes powerpc registers with an "r" as
dnl in "r6", or as plain "6". The latter is standard, but NeXT, Rhapsody,
dnl and MacOS-X require the "r" forms.
dnl
dnl See also mpn/powerpc32/powerpc-defs.m4 which uses the result of this
dnl test.
AC_DEFUN([GMP_ASM_POWERPC_R_REGISTERS],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the assembler needs r on registers],
gmp_cv_asm_powerpc_r_registers,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
mtctr 6],
[gmp_cv_asm_powerpc_r_registers=no],
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
mtctr r6],
[gmp_cv_asm_powerpc_r_registers=yes],
[AC_MSG_ERROR([neither "mtctr 6" nor "mtctr r6" works])])])])
GMP_DEFINE_RAW(["define(<WANT_R_REGISTERS>,<$gmp_cv_asm_powerpc_r_registers>)"])
])
dnl GMP_ASM_SPARC_REGISTER
dnl ----------------------
dnl Determine whether the assembler accepts the ".register" directive.
dnl Old versions of solaris "as" don't.
dnl
dnl See also mpn/sparc32/sparc-defs.m4 which uses the result of this test.
AC_DEFUN([GMP_ASM_SPARC_REGISTER],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the assembler accepts ".register"],
gmp_cv_asm_sparc_register,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
.register %g2,#scratch
],
[gmp_cv_asm_sparc_register=yes],
[gmp_cv_asm_sparc_register=no])])
GMP_DEFINE_RAW(["define(<HAVE_REGISTER>,<$gmp_cv_asm_sparc_register>)"])
])
dnl GMP_ASM_SPARC_GOTDATA
dnl ----------------------
dnl Determine whether the assembler accepts gotdata relocations.
dnl
dnl See also mpn/sparc32/sparc-defs.m4 which uses the result of this test.
AC_DEFUN([GMP_ASM_SPARC_GOTDATA],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the assembler accepts gotdata relocations],
gmp_cv_asm_sparc_gotdata,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
.text
sethi %gdop_hix22(symbol), %g1
or %g1, %gdop_lox10(symbol), %g1
],
[gmp_cv_asm_sparc_gotdata=yes],
[gmp_cv_asm_sparc_gotdata=no])])
GMP_DEFINE_RAW(["define(<HAVE_GOTDATA>,<$gmp_cv_asm_sparc_gotdata>)"])
])
dnl GMP_ASM_SPARC_SHARED_THUNKS
dnl ----------------------
dnl Determine whether the assembler supports all of the features
dnl necessary in order to emit shared PIC thunks on sparc.
dnl
dnl See also mpn/sparc32/sparc-defs.m4 which uses the result of this test.
AC_DEFUN([GMP_ASM_SPARC_SHARED_THUNKS],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the assembler can support shared PIC thunks],
gmp_cv_asm_sparc_shared_thunks,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
.section .text.__sparc_get_pc_thunk.l7,"axG",@progbits,__sparc_get_pc_thunk.l7,comdat
.weak __sparc_get_pc_thunk.l7
.hidden __sparc_get_pc_thunk.l7
.type __sparc_get_pc_thunk.l7, #function
__sparc_get_pc_thunk.l7:
jmp %o7+8
add %o7, %l7, %l7
],
[gmp_cv_asm_sparc_shared_thunks=yes],
[gmp_cv_asm_sparc_shared_thunks=no])])
GMP_DEFINE_RAW(["define(<HAVE_SHARED_THUNKS>,<$gmp_cv_asm_sparc_shared_thunks>)"])
])
dnl GMP_C_ATTRIBUTE_CONST
dnl ---------------------
AC_DEFUN([GMP_C_ATTRIBUTE_CONST],
[AC_CACHE_CHECK([whether gcc __attribute__ ((const)) works],
gmp_cv_c_attribute_const,
[AC_TRY_COMPILE([int foo (int x) __attribute__ ((const));], ,
gmp_cv_c_attribute_const=yes, gmp_cv_c_attribute_const=no)
])
if test $gmp_cv_c_attribute_const = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_CONST, 1,
[Define to 1 if the compiler accepts gcc style __attribute__ ((const))])
fi
])
dnl GMP_C_ATTRIBUTE_MALLOC
dnl ----------------------
dnl gcc 2.95.x accepts __attribute__ ((malloc)) but with a warning that
dnl it's ignored. Pretend it doesn't exist in this case, to avoid that
dnl warning.
AC_DEFUN([GMP_C_ATTRIBUTE_MALLOC],
[AC_CACHE_CHECK([whether gcc __attribute__ ((malloc)) works],
gmp_cv_c_attribute_malloc,
[cat >conftest.c <<EOF
void *foo (int x) __attribute__ ((malloc));
EOF
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >conftest.out 2>&1"
if AC_TRY_EVAL(gmp_compile); then
if grep "attribute directive ignored" conftest.out >/dev/null; then
gmp_cv_c_attribute_malloc=no
else
gmp_cv_c_attribute_malloc=yes
fi
else
gmp_cv_c_attribute_malloc=no
fi
cat conftest.out >&AC_FD_CC
rm -f conftest*
])
if test $gmp_cv_c_attribute_malloc = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_MALLOC, 1,
[Define to 1 if the compiler accepts gcc style __attribute__ ((malloc))])
fi
])
dnl GMP_C_ATTRIBUTE_MODE
dnl --------------------
dnl Introduced in gcc 2.2, but perhaps not in all Apple derived versions.
AC_DEFUN([GMP_C_ATTRIBUTE_MODE],
[AC_CACHE_CHECK([whether gcc __attribute__ ((mode (XX))) works],
gmp_cv_c_attribute_mode,
[AC_TRY_COMPILE([typedef int SItype __attribute__ ((mode (SI)));], ,
gmp_cv_c_attribute_mode=yes, gmp_cv_c_attribute_mode=no)
])
if test $gmp_cv_c_attribute_mode = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_MODE, 1,
[Define to 1 if the compiler accepts gcc style __attribute__ ((mode (XX)))])
fi
])
dnl GMP_C_ATTRIBUTE_NORETURN
dnl ------------------------
AC_DEFUN([GMP_C_ATTRIBUTE_NORETURN],
[AC_CACHE_CHECK([whether gcc __attribute__ ((noreturn)) works],
gmp_cv_c_attribute_noreturn,
[AC_TRY_COMPILE([void foo (int x) __attribute__ ((noreturn));], ,
gmp_cv_c_attribute_noreturn=yes, gmp_cv_c_attribute_noreturn=no)
])
if test $gmp_cv_c_attribute_noreturn = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_NORETURN, 1,
[Define to 1 if the compiler accepts gcc style __attribute__ ((noreturn))])
fi
])
dnl GMP_C_DOUBLE_FORMAT
dnl -------------------
dnl Determine the floating point format.
dnl
dnl The object file is grepped, in order to work when cross compiling. A
dnl start and end sequence is included to avoid false matches, and allowance
dnl is made for the desired data crossing an "od -b" line boundary. The test
dnl number is a small integer so it should appear exactly, no rounding or
dnl truncation etc.
dnl
dnl "od -b", incidentally, is supported even by Unix V7, and the awk script
dnl used doesn't have functions or anything, so even an "old" awk should
dnl suffice.
dnl
dnl The C code here declares the variable foo as extern; without that, some
dnl C++ compilers will not put foo in the object file.
AC_DEFUN([GMP_C_DOUBLE_FORMAT],
[AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_AWK])
AC_CACHE_CHECK([format of `double' floating point],
gmp_cv_c_double_format,
[gmp_cv_c_double_format=unknown
cat >conftest.c <<\EOF
[struct foo {
char before[8];
double x;
char after[8];
};
extern struct foo foo;
struct foo foo = {
{ '\001', '\043', '\105', '\147', '\211', '\253', '\315', '\357' },
-123456789.0,
{ '\376', '\334', '\272', '\230', '\166', '\124', '\062', '\020' },
};]
EOF
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AC_FD_CC 2>&1"
if AC_TRY_EVAL(gmp_compile); then
cat >conftest.awk <<\EOF
[
BEGIN {
found = 0
}
{
for (f = 2; f <= NF; f++)
{
for (i = 0; i < 23; i++)
got[i] = got[i+1];
got[23] = $f;
# match the special begin and end sequences
if (got[0] != "001") continue
if (got[1] != "043") continue
if (got[2] != "105") continue
if (got[3] != "147") continue
if (got[4] != "211") continue
if (got[5] != "253") continue
if (got[6] != "315") continue
if (got[7] != "357") continue
if (got[16] != "376") continue
if (got[17] != "334") continue
if (got[18] != "272") continue
if (got[19] != "230") continue
if (got[20] != "166") continue
if (got[21] != "124") continue
if (got[22] != "062") continue
if (got[23] != "020") continue
saw = " (" got[8] " " got[9] " " got[10] " " got[11] " " got[12] " " got[13] " " got[14] " " got[15] ")"
if (got[8] == "000" && \
got[9] == "000" && \
got[10] == "000" && \
got[11] == "124" && \
got[12] == "064" && \
got[13] == "157" && \
got[14] == "235" && \
got[15] == "301")
{
print "IEEE little endian"
found = 1
exit
}
# Little endian with the two 4-byte halves swapped, as used by ARM
# when the chip is in little endian mode.
#
if (got[8] == "064" && \
got[9] == "157" && \
got[10] == "235" && \
got[11] == "301" && \
got[12] == "000" && \
got[13] == "000" && \
got[14] == "000" && \
got[15] == "124")
{
print "IEEE little endian, swapped halves"
found = 1
exit
}
# gcc 2.95.4 on one GNU/Linux ARM system was seen generating 000 in
# the last byte, whereas 124 is correct. Not sure where the bug
# actually lies, but a running program didn't seem to get a full
# mantissa worth of working bits.
#
# We match this case explicitly so we can give a nice result message,
# but we deliberately exclude it from the normal IEEE double setups
# since it's too broken.
#
if (got[8] == "064" && \
got[9] == "157" && \
got[10] == "235" && \
got[11] == "301" && \
got[12] == "000" && \
got[13] == "000" && \
got[14] == "000" && \
got[15] == "000")
{
print "bad ARM software floats"
found = 1
exit
}
if (got[8] == "301" && \
got[9] == "235" && \
got[10] == "157" && \
got[11] == "064" && \
got[12] == "124" && \
got[13] == "000" && \
got[14] == "000" && \
got[15] == "000")
{
print "IEEE big endian"
found = 1
exit
}
if (got[8] == "353" && \
got[9] == "315" && \
got[10] == "242" && \
got[11] == "171" && \
got[12] == "000" && \
got[13] == "240" && \
got[14] == "000" && \
got[15] == "000")
{
print "VAX D"
found = 1
exit
}
if (got[8] == "275" && \
got[9] == "301" && \
got[10] == "064" && \
got[11] == "157" && \
got[12] == "000" && \
got[13] == "124" && \
got[14] == "000" && \
got[15] == "000")
{
print "VAX G"
found = 1
exit
}
if (got[8] == "300" && \
got[9] == "033" && \
got[10] == "353" && \
got[11] == "171" && \
got[12] == "242" && \
got[13] == "240" && \
got[14] == "000" && \
got[15] == "000")
{
print "Cray CFP"
found = 1
exit
}
}
}
END {
if (! found)
print "unknown", saw
}
]
EOF
gmp_cv_c_double_format=`od -b conftest.$OBJEXT | $AWK -f conftest.awk`
case $gmp_cv_c_double_format in
unknown*)
echo "cannot match anything, conftest.$OBJEXT contains" >&AC_FD_CC
od -b conftest.$OBJEXT >&AC_FD_CC
;;
esac
else
AC_MSG_WARN([oops, cannot compile test program])
fi
rm -f conftest*
])
AH_VERBATIM([HAVE_DOUBLE],
[/* Define one of the following to 1 for the format of a `double'.
If your format is not among these choices, or you don't know what it is,
then leave all undefined.
IEEE_LITTLE_SWAPPED means little endian, but with the two 4-byte halves
swapped, as used by ARM CPUs in little endian mode. */
#undef HAVE_DOUBLE_IEEE_BIG_ENDIAN
#undef HAVE_DOUBLE_IEEE_LITTLE_ENDIAN
#undef HAVE_DOUBLE_IEEE_LITTLE_SWAPPED
#undef HAVE_DOUBLE_VAX_D
#undef HAVE_DOUBLE_VAX_G
#undef HAVE_DOUBLE_CRAY_CFP])
case $gmp_cv_c_double_format in
"IEEE big endian")
AC_DEFINE(HAVE_DOUBLE_IEEE_BIG_ENDIAN, 1)
GMP_DEFINE_RAW("define_not_for_expansion(\`HAVE_DOUBLE_IEEE_BIG_ENDIAN')", POST)
;;
"IEEE little endian")
AC_DEFINE(HAVE_DOUBLE_IEEE_LITTLE_ENDIAN, 1)
GMP_DEFINE_RAW("define_not_for_expansion(\`HAVE_DOUBLE_IEEE_LITTLE_ENDIAN')", POST)
;;
"IEEE little endian, swapped halves")
AC_DEFINE(HAVE_DOUBLE_IEEE_LITTLE_SWAPPED, 1) ;;
"VAX D")
AC_DEFINE(HAVE_DOUBLE_VAX_D, 1) ;;
"VAX G")
AC_DEFINE(HAVE_DOUBLE_VAX_G, 1) ;;
"Cray CFP")
AC_DEFINE(HAVE_DOUBLE_CRAY_CFP, 1) ;;
"bad ARM software floats")
;;
unknown*)
AC_MSG_WARN([Could not determine float format.])
AC_MSG_WARN([Conversions to and from "double" may be slow.])
;;
*)
AC_MSG_WARN([oops, unrecognised float format: $gmp_cv_c_double_format])
;;
esac
])
dnl GMP_C_STDARG
dnl ------------
dnl Test whether to use <stdarg.h>.
dnl
dnl Notice the AC_DEFINE here is HAVE_STDARG to avoid clashing with
dnl HAVE_STDARG_H which could arise from AC_CHECK_HEADERS.
dnl
dnl This test might be slight overkill, after all there's really only going
dnl to be ANSI or K&R and the two can be differentiated by AC_PROG_CC_STDC
dnl or very likely by the setups for _PROTO in gmp.h. On the other hand
dnl this test is nice and direct, being what we're going to actually use.
dnl AC_DEFUN([GMP_C_STDARG],
dnl [AC_CACHE_CHECK([whether <stdarg.h> exists and works],
dnl gmp_cv_c_stdarg,
dnl [AC_TRY_COMPILE(
dnl [#include <stdarg.h>
dnl int foo (int x, ...)
dnl {
dnl va_list ap;
dnl int y;
dnl va_start (ap, x);
dnl y = va_arg (ap, int);
dnl va_end (ap);
dnl return y;
dnl }],,
dnl gmp_cv_c_stdarg=yes, gmp_cv_c_stdarg=no)
dnl ])
dnl if test $gmp_cv_c_stdarg = yes; then
dnl AC_DEFINE(HAVE_STDARG, 1, [Define to 1 if <stdarg.h> exists and works])
dnl fi
dnl ])
dnl GMP_FUNC_ALLOCA
dnl ---------------
dnl Determine whether "alloca" is available. This is AC_FUNC_ALLOCA from
dnl autoconf, but changed so it doesn't use alloca.c if alloca() isn't
dnl available, and also to use gmp-impl.h for the conditionals detecting
dnl compiler builtin alloca's.
AC_DEFUN([GMP_FUNC_ALLOCA],
[AC_REQUIRE([GMP_HEADER_ALLOCA])
AC_CACHE_CHECK([for alloca (via gmp-impl.h)],
gmp_cv_func_alloca,
[AC_TRY_LINK(
GMP_INCLUDE_GMP_H
[#include "$srcdir/gmp-impl.h"
],
[char *p = (char *) alloca (1);],
gmp_cv_func_alloca=yes,
gmp_cv_func_alloca=no)])
if test $gmp_cv_func_alloca = yes; then
AC_DEFINE(HAVE_ALLOCA, 1, [Define to 1 if alloca() works (via gmp-impl.h).])
fi
])
AC_DEFUN([GMP_HEADER_ALLOCA],
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments. Useless!
AC_CACHE_CHECK([for working alloca.h],
gmp_cv_header_alloca,
[AC_TRY_LINK([#include <alloca.h>],
[char *p = (char *) alloca (2 * sizeof (int));],
gmp_cv_header_alloca=yes,
gmp_cv_header_alloca=no)])
if test $gmp_cv_header_alloca = yes; then
AC_DEFINE(HAVE_ALLOCA_H, 1,
[Define to 1 if you have <alloca.h> and it should be used (not on Ultrix).])
fi
])
dnl GMP_OPTION_ALLOCA
dnl -----------------
dnl Decide what to do about --enable-alloca from the user.
dnl This is a macro so it can require GMP_FUNC_ALLOCA.
AC_DEFUN([GMP_OPTION_ALLOCA],
[AC_REQUIRE([GMP_FUNC_ALLOCA])
AC_CACHE_CHECK([how to allocate temporary memory],
gmp_cv_option_alloca,
[case $enable_alloca in
yes)
gmp_cv_option_alloca=alloca
;;
no)
gmp_cv_option_alloca=malloc-reentrant
;;
reentrant | notreentrant)
case $gmp_cv_func_alloca in
yes) gmp_cv_option_alloca=alloca ;;
*) gmp_cv_option_alloca=malloc-$enable_alloca ;;
esac
;;
*)
gmp_cv_option_alloca=$enable_alloca
;;
esac
])
AH_VERBATIM([WANT_TMP],
[/* Define one of these to 1 for the desired temporary memory allocation
method, per --enable-alloca. */
#undef WANT_TMP_ALLOCA
#undef WANT_TMP_REENTRANT
#undef WANT_TMP_NOTREENTRANT
#undef WANT_TMP_DEBUG])
case $gmp_cv_option_alloca in
alloca)
if test $gmp_cv_func_alloca = no; then
AC_MSG_ERROR([--enable-alloca=alloca specified, but alloca not available])
fi
AC_DEFINE(WANT_TMP_ALLOCA)
TAL_OBJECT=tal-reent$U.lo
;;
malloc-reentrant)
AC_DEFINE(WANT_TMP_REENTRANT)
TAL_OBJECT=tal-reent$U.lo
;;
malloc-notreentrant)
AC_DEFINE(WANT_TMP_NOTREENTRANT)
TAL_OBJECT=tal-notreent$U.lo
;;
debug)
AC_DEFINE(WANT_TMP_DEBUG)
TAL_OBJECT=tal-debug$U.lo
;;
*)
# checks at the start of configure.in should protect us
AC_MSG_ERROR([unrecognised --enable-alloca=$gmp_cv_option_alloca])
;;
esac
AC_SUBST(TAL_OBJECT)
])
dnl GMP_FUNC_SSCANF_WRITABLE_INPUT
dnl ------------------------------
dnl Determine whether sscanf requires a writable input string.
dnl
dnl It might be nicer to run a program to determine this when doing a
dnl native build, but the systems afflicted are few and far between these
dnl days, so it seems good enough just to list them.
AC_DEFUN([GMP_FUNC_SSCANF_WRITABLE_INPUT],
[AC_CACHE_CHECK([whether sscanf needs writable input],
gmp_cv_func_sscanf_writable_input,
[case $host in
*-*-hpux9 | *-*-hpux9.*)
gmp_cv_func_sscanf_writable_input=yes ;;
*) gmp_cv_func_sscanf_writable_input=no ;;
esac
])
case $gmp_cv_func_sscanf_writable_input in
yes) AC_DEFINE(SSCANF_WRITABLE_INPUT, 1,
[Define to 1 if sscanf requires writable inputs]) ;;
no) ;;
*) AC_MSG_ERROR([unrecognised \$gmp_cv_func_sscanf_writable_input]) ;;
esac
])
dnl GMP_FUNC_VSNPRINTF
dnl ------------------
dnl Check whether vsnprintf exists, and works properly.
dnl
dnl Systems without vsnprintf include mingw32, OSF 4.
dnl
dnl Sparc Solaris 2.7 in 64-bit mode doesn't always truncate, making
dnl vsnprintf like vsprintf, and hence completely useless. On one system a
dnl literal string is enough to provoke the problem, on another a "%n" was
dnl needed. There seems to be something weird going on with the optimizer
dnl or something, since on the first system adding a second check with
dnl "%n", or even just an initialized local variable, makes it work. In
dnl any case, without bothering to get to the bottom of this, the two
dnl program runs in the code below end up successfully detecting the
dnl problem.
dnl
dnl glibc 2.0.x returns either -1 or bufsize-1 for an overflow (both seen,
dnl not sure which 2.0.x does which), but still puts the correct null
dnl terminated result into the buffer.
AC_DEFUN([GMP_FUNC_VSNPRINTF],
[AC_CHECK_FUNC(vsnprintf,
[gmp_vsnprintf_exists=yes],
[gmp_vsnprintf_exists=no])
if test "$gmp_vsnprintf_exists" = no; then
gmp_cv_func_vsnprintf=no
else
AC_CACHE_CHECK([whether vsnprintf works],
gmp_cv_func_vsnprintf,
[gmp_cv_func_vsnprintf=yes
for i in 'return check ("hello world");' 'int n; return check ("%nhello world", &n);'; do
AC_TRY_RUN([
#include <string.h> /* for strcmp */
#include <stdio.h> /* for vsnprintf */
#include <stdarg.h>
int
check (const char *fmt, ...)
{
static char buf[128];
va_list ap;
int ret;
va_start (ap, fmt);
ret = vsnprintf (buf, 4, fmt, ap);
if (strcmp (buf, "hel") != 0)
return 1;
/* allowed return values */
if (ret != -1 && ret != 3 && ret != 11)
return 2;
return 0;
}
int
main ()
{
$i
}
],
[:],
[gmp_cv_func_vsnprintf=no; break],
[gmp_cv_func_vsnprintf=probably; break])
done
])
if test "$gmp_cv_func_vsnprintf" = probably; then
AC_MSG_WARN([cannot check for properly working vsnprintf when cross compiling, will assume it's ok])
fi
if test "$gmp_cv_func_vsnprintf" != no; then
AC_DEFINE(HAVE_VSNPRINTF,1,
[Define to 1 if you have the `vsnprintf' function and it works properly.])
fi
fi
])
dnl GMP_H_EXTERN_INLINE
dnl -------------------
dnl If the compiler has an "inline" of some sort, check whether the
dnl #ifdef's in gmp.h recognise it.
AC_DEFUN([GMP_H_EXTERN_INLINE],
[AC_REQUIRE([AC_C_INLINE])
case $ac_cv_c_inline in
no) ;;
*)
AC_TRY_COMPILE(
[#define __GMP_WITHIN_CONFIGURE_INLINE 1
]GMP_INCLUDE_GMP_H[
#ifndef __GMP_EXTERN_INLINE
die die die
#endif
],,,
[case $ac_cv_c_inline in
yes) tmp_inline=inline ;;
*) tmp_inline=$ac_cv_c_inline ;;
esac
AC_MSG_WARN([gmp.h doesnt recognise compiler "$tmp_inline", inlines will be unavailable])])
;;
esac
])
dnl GMP_H_HAVE_FILE
dnl ---------------
dnl Check whether the #ifdef's in gmp.h recognise when stdio.h has been
dnl included to get FILE.
AC_DEFUN([GMP_H_HAVE_FILE],
[AC_TRY_COMPILE(
[#include <stdio.h>]
GMP_INCLUDE_GMP_H
[#if ! _GMP_H_HAVE_FILE
die die die
#endif
],,,
[AC_MSG_WARN([gmp.h doesnt recognise <stdio.h>, FILE prototypes will be unavailable])])
])
dnl GMP_PROG_CC_FOR_BUILD
dnl ---------------------
dnl Establish CC_FOR_BUILD, a C compiler for the build system.
dnl
dnl If CC_FOR_BUILD is set then it's expected to work, likewise the old
dnl style HOST_CC, otherwise some likely candidates are tried, the same as
dnl configfsf.guess.
AC_DEFUN([GMP_PROG_CC_FOR_BUILD],
[AC_REQUIRE([AC_PROG_CC])
if test -n "$CC_FOR_BUILD"; then
GMP_PROG_CC_FOR_BUILD_WORKS($CC_FOR_BUILD,,
[AC_MSG_ERROR([Specified CC_FOR_BUILD doesn't seem to work])])
elif test -n "$HOST_CC"; then
GMP_PROG_CC_FOR_BUILD_WORKS($HOST_CC,
[CC_FOR_BUILD=$HOST_CC],
[AC_MSG_ERROR([Specified HOST_CC doesn't seem to work])])
else
for i in "$CC" "$CC $CFLAGS $CPPFLAGS" cc gcc c89 c99; do
GMP_PROG_CC_FOR_BUILD_WORKS($i,
[CC_FOR_BUILD=$i
break])
done
if test -z "$CC_FOR_BUILD"; then
AC_MSG_ERROR([Cannot find a build system compiler])
fi
fi
AC_ARG_VAR(CC_FOR_BUILD,[build system C compiler])
AC_SUBST(CC_FOR_BUILD)
])
dnl GMP_PROG_CC_FOR_BUILD_WORKS(cc/cflags[,[action-if-good][,action-if-bad]])
dnl -------------------------------------------------------------------------
dnl See if the given cc/cflags works on the build system.
dnl
dnl It seems easiest to just use the default compiler output, rather than
dnl figuring out the .exe or whatever at this stage.
AC_DEFUN([GMP_PROG_CC_FOR_BUILD_WORKS],
[AC_MSG_CHECKING([build system compiler $1])
# remove anything that might look like compiler output to our "||" expression
rm -f conftest* a.out b.out a.exe a_out.exe
cat >conftest.c <<EOF
int
main ()
{
exit(0);
}
EOF
gmp_compile="$1 conftest.c"
cc_for_build_works=no
if AC_TRY_EVAL(gmp_compile); then
if (./a.out || ./b.out || ./a.exe || ./a_out.exe || ./conftest) >&AC_FD_CC 2>&1; then
cc_for_build_works=yes
fi
fi
rm -f conftest* a.out b.out a.exe a_out.exe
AC_MSG_RESULT($cc_for_build_works)
if test "$cc_for_build_works" = yes; then
ifelse([$2],,:,[$2])
else
ifelse([$3],,:,[$3])
fi
])
dnl GMP_PROG_CPP_FOR_BUILD
dnl ---------------------
dnl Establish CPP_FOR_BUILD, the build system C preprocessor.
dnl The choices tried here are the same as AC_PROG_CPP, but with
dnl CC_FOR_BUILD.
AC_DEFUN([GMP_PROG_CPP_FOR_BUILD],
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
AC_MSG_CHECKING([for build system preprocessor])
if test -z "$CPP_FOR_BUILD"; then
AC_CACHE_VAL(gmp_cv_prog_cpp_for_build,
[cat >conftest.c <<EOF
#define FOO BAR
EOF
for i in "$CC_FOR_BUILD -E" "$CC_FOR_BUILD -E -traditional-cpp" "/lib/cpp"; do
gmp_compile="$i conftest.c"
if AC_TRY_EVAL(gmp_compile) >&AC_FD_CC 2>&1; then
gmp_cv_prog_cpp_for_build=$i
break
fi
done
rm -f conftest* a.out b.out a.exe a_out.exe
if test -z "$gmp_cv_prog_cpp_for_build"; then
AC_MSG_ERROR([Cannot find build system C preprocessor.])
fi
])
CPP_FOR_BUILD=$gmp_cv_prog_cpp_for_build
fi
AC_MSG_RESULT([$CPP_FOR_BUILD])
AC_ARG_VAR(CPP_FOR_BUILD,[build system C preprocessor])
AC_SUBST(CPP_FOR_BUILD)
])
dnl GMP_PROG_EXEEXT_FOR_BUILD
dnl -------------------------
dnl Determine EXEEXT_FOR_BUILD, the build system executable suffix.
dnl
dnl The idea is to find what "-o conftest$foo" will make it possible to run
dnl the program with ./conftest. On Unix-like systems this is of course
dnl nothing, for DOS it's ".exe", or for a strange RISC OS foreign file
dnl system cross compile it can be ",ff8" apparently. Not sure if the
dnl latter actually applies to a build-system executable, maybe it doesn't,
dnl but it won't hurt to try.
AC_DEFUN([GMP_PROG_EXEEXT_FOR_BUILD],
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
AC_CACHE_CHECK([for build system executable suffix],
gmp_cv_prog_exeext_for_build,
[cat >conftest.c <<EOF
int
main ()
{
exit (0);
}
EOF
for i in .exe ,ff8 ""; do
gmp_compile="$CC_FOR_BUILD conftest.c -o conftest$i"
if AC_TRY_EVAL(gmp_compile); then
if (./conftest) 2>&AC_FD_CC; then
gmp_cv_prog_exeext_for_build=$i
break
fi
fi
done
rm -f conftest*
if test "${gmp_cv_prog_exeext_for_build+set}" != set; then
AC_MSG_ERROR([Cannot determine executable suffix])
fi
])
AC_SUBST(EXEEXT_FOR_BUILD,$gmp_cv_prog_exeext_for_build)
])
dnl GMP_C_FOR_BUILD_ANSI
dnl --------------------
dnl Determine whether CC_FOR_BUILD is ANSI, and establish U_FOR_BUILD
dnl accordingly.
dnl
dnl FIXME: Use AC_PROG_CC sets ac_cv_prog_cc_c89 which could be used instead
AC_DEFUN([GMP_C_FOR_BUILD_ANSI],
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
AC_CACHE_CHECK([whether build system compiler is ANSI],
gmp_cv_c_for_build_ansi,
[cat >conftest.c <<EOF
int
main (int argc, char **argv)
{
exit(0);
}
EOF
gmp_compile="$CC_FOR_BUILD conftest.c"
if AC_TRY_EVAL(gmp_compile); then
gmp_cv_c_for_build_ansi=yes
else
gmp_cv_c_for_build_ansi=no
fi
rm -f conftest* a.out b.out a.exe a_out.exe
])
if test "$gmp_cv_c_for_build_ansi" = yes; then
U_FOR_BUILD=
else
AC_SUBST(U_FOR_BUILD,_)
fi
])
dnl GMP_CHECK_LIBM_FOR_BUILD
dnl ------------------------
dnl Establish LIBM_FOR_BUILD as -lm, if that seems to work.
dnl
dnl Libtool AC_CHECK_LIBM also uses -lmw on *-ncr-sysv4.3*, if it works.
dnl Don't know what that does, lets assume it's not needed just for log().
AC_DEFUN([GMP_CHECK_LIBM_FOR_BUILD],
[AC_REQUIRE([GMP_PROG_CC_FOR_BUILD])
AC_CACHE_CHECK([for build system compiler math library],
gmp_cv_check_libm_for_build,
[cat >conftest.c <<EOF
int
main ()
{
exit(0);
}
double d;
double
foo ()
{
return log (d);
}
EOF
gmp_compile="$CC_FOR_BUILD conftest.c -lm"
if AC_TRY_EVAL(gmp_compile); then
gmp_cv_check_libm_for_build=-lm
else
gmp_cv_check_libm_for_build=no
fi
rm -f conftest* a.out b.out a.exe a_out.exe
])
case $gmp_cv_check_libm_for_build in
yes) AC_SUBST(LIBM_FOR_BUILD,-lm) ;;
no) LIBM_FOR_BUILD= ;;
*) LIBM_FOR_BUILD=$gmp_cv_check_libm_for_build ;;
esac
])