dnl configuration script for expat dnl Process this file with autoconf to produce a configure script. dnl __ __ _ dnl ___\ \/ /_ __ __ _| |_ dnl / _ \\ /| '_ \ / _` | __| dnl | __// \| |_) | (_| | |_ dnl \___/_/\_\ .__/ \__,_|\__| dnl |_| XML parser dnl dnl Copyright (c) 2000 Clark Cooper <[email protected]> dnl Copyright (c) 2000-2005 Fred L. Drake, Jr. <[email protected]> dnl Copyright (c) 2001-2003 Greg Stein <[email protected]> dnl Copyright (c) 2006-2012 Karl Waclawek <[email protected]> dnl Copyright (c) 2016-2025 Sebastian Pipping <[email protected]> dnl Copyright (c) 2017 S. P. Zeidler <[email protected]> dnl Copyright (c) 2017 Stephen Groat <[email protected]> dnl Copyright (c) 2017-2020 Joe Orton <[email protected]> dnl Copyright (c) 2018 Yury Gribov <[email protected]> dnl Copyright (c) 2018 Benjamin Peterson <[email protected]> dnl Copyright (c) 2018 Marco Maggi <[email protected]> dnl Copyright (c) 2018 KangLin <[email protected]> dnl Copyright (c) 2019 Mohammed Khajapasha <[email protected]> dnl Copyright (c) 2019 Kishore Kunche <[email protected]> dnl Copyright (c) 2020 Jeffrey Walton <[email protected]> dnl Copyright (c) 2024 Ferenc Géczi <[email protected]> dnl Copyright (c) 2024 Dag-Erling Smørgrav <[email protected]> dnl Copyright (c) 2025 Matthew Fernandez <[email protected]> dnl Licensed under the MIT license: dnl dnl Permission is hereby granted, free of charge, to any person obtaining dnl a copy of this software and associated documentation files (the dnl "Software"), to deal in the Software without restriction, including dnl without limitation the rights to use, copy, modify, merge, publish, dnl distribute, sublicense, and/or sell copies of the Software, and to permit dnl persons to whom the Software is furnished to do so, subject to the dnl following conditions: dnl dnl The above copyright notice and this permission notice shall be included dnl in all copies or substantial portions of the Software. dnl dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, dnl EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN dnl NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, dnl DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR dnl OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE dnl USE OR OTHER DEALINGS IN THE SOFTWARE. dnl Ensure that Expat is configured with autoconf 2.69 or newer. AC_PREREQ([2.69]) dnl Get the version number of Expat, using m4's esyscmd() command to run dnl the command at m4-generation time. This allows us to create an m4 dnl symbol holding the correct version number. AC_INIT requires the dnl version number at m4-time, rather than when ./configure is run, so dnl all this must happen as part of m4, not as part of the shell code dnl contained in ./configure. dnl dnl NOTE: esyscmd() is a GNU M4 extension. Thus, we wrap it in an appropriate dnl test. I believe this test will work, but I don't have a place with non- dnl GNU M4 to test it right now. m4_define([expat_version], m4_ifdef([__gnu__], [esyscmd(conftools/get-version.sh lib/expat.h)], [2.2.x])) AC_INIT([expat], expat_version, [https://github.com/libexpat/libexpat/issues]) m4_undefine([expat_version]) AC_CONFIG_SRCDIR([Makefile.in]) AC_CONFIG_AUX_DIR([conftools]) AC_CONFIG_MACRO_DIR([m4]) AC_CANONICAL_HOST AM_INIT_AUTOMAKE AM_MAINTAINER_MODE([enable]) # to allow argument --disable-maintainer-mode dnl dnl Increment LIBREVISION if source code has changed at all dnl dnl If the API has changed, increment LIBCURRENT and set LIBREVISION to 0 dnl dnl If the API changes compatibly (i.e. simply adding a new function dnl without changing or removing earlier interfaces), then increment LIBAGE. dnl dnl If the API changes incompatibly set LIBAGE back to 0 dnl LIBCURRENT=12 # sync LIBREVISION=1 # with LIBAGE=11 # CMakeLists.txt! AC_CONFIG_HEADERS([expat_config.h]) AH_TOP([#ifndef EXPAT_CONFIG_H #define EXPAT_CONFIG_H 1]) AH_BOTTOM([#endif // ndef EXPAT_CONFIG_H]) AM_PROG_AR AC_PROG_INSTALL AC_PROG_MAKE_SET LT_PREREQ([2.4]) LT_INIT([win32-dll]) AC_SUBST(LIBCURRENT) AC_SUBST(LIBREVISION) AC_SUBST(LIBAGE) AC_LANG([C]) AC_PROG_CC_C99 AS_IF([test "${ac_cv_prog_cc_c99}" = no], [AC_MSG_ERROR([Expat requires a C99 compiler.])]) AS_IF([test "$GCC" = yes], [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [AM_CFLAGS]) dnl Be careful about adding the -fexceptions option; some versions of dnl GCC don't support it and it causes extra warnings that are only dnl distracting; avoid. AX_APPEND_COMPILE_FLAGS([-fexceptions], [AM_CFLAGS]) AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing -Wmissing-prototypes -Wstrict-prototypes], [AM_CFLAGS]) AX_APPEND_COMPILE_FLAGS([-pedantic -Wduplicated-cond -Wduplicated-branches -Wlogical-op], [AM_CFLAGS]) AX_APPEND_COMPILE_FLAGS([-Wrestrict -Wnull-dereference -Wjump-misses-init -Wdouble-promotion], [AM_CFLAGS]) AX_APPEND_COMPILE_FLAGS([-Wshadow -Wformat=2 -Wno-pedantic-ms-format -Wmisleading-indentation], [AM_CFLAGS])]) AC_LANG_PUSH([C++]) AC_PROG_CXX AS_IF([test "$GCC" = yes], [AX_APPEND_COMPILE_FLAGS([-Wall -Wextra], [AM_CXXFLAGS]) dnl Be careful about adding the -fexceptions option; some versions of dnl GCC don't support it and it causes extra warnings that are only dnl distracting; avoid. AX_APPEND_COMPILE_FLAGS([-fexceptions], [AM_CXXFLAGS]) AX_APPEND_COMPILE_FLAGS([-fno-strict-aliasing], [AM_CXXFLAGS])]) AC_LANG_POP([C++]) AS_IF([test "$GCC" = yes], [AX_APPEND_LINK_FLAGS([-fno-strict-aliasing],[AM_LDFLAGS])]) dnl patching ${archive_cmds} to affect generation of file "libtool" to fix linking with clang (issue #312) AS_CASE(["$LD"],[*clang*], [AS_CASE(["${host_os}"], [*linux*],[archive_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname -o $lib'])]) EXPATCFG_COMPILER_SUPPORTS_VISIBILITY([ AX_APPEND_FLAG([-fvisibility=hidden], [AM_CFLAGS]) AS_IF([test "${enable_shared}" = yes], [AX_APPEND_FLAG([-DXML_ENABLE_VISIBILITY=1], [AM_CPPFLAGS])])]) dnl Checks for typedefs, structures, and compiler characteristics. dnl We define BYTEORDER to 1234 when the platform is little endian; it dnl defines it to 4321 when the platform is big endian. We also define dnl WORDS_BIGENDIAN to 1 when the platform is big endian. dnl dnl A long time ago (early 2000 years) AC_C_BIGENDIAN was considered dnl wrong when cross compiling, now (2018, GNU Autoconf 2.69) we assume dnl it is fine. AC_C_BIGENDIAN([AC_DEFINE([WORDS_BIGENDIAN], 1) AS_VAR_SET([BYTEORDER], 4321)], [AS_VAR_SET([BYTEORDER], 1234)]) AC_DEFINE_UNQUOTED([BYTEORDER], $BYTEORDER, [1234 = LILENDIAN, 4321 = BIGENDIAN]) AC_C_CONST AC_ARG_WITH([xmlwf], [AS_HELP_STRING([--without-xmlwf], [do not build xmlwf])], [], [with_xmlwf=yes]) AM_CONDITIONAL([WITH_XMLWF], [test x${with_xmlwf} = xyes]) AC_ARG_WITH([examples], [AS_HELP_STRING([--without-examples], [do not build examples @<:@default=included@:>@])], [], [with_examples=yes]) AM_CONDITIONAL([WITH_EXAMPLES], [test x${with_examples} = xyes]) AC_ARG_WITH([tests], [AS_HELP_STRING([--without-tests], [do not build tests @<:@default=included@:>@])], [], [with_tests=yes]) AM_CONDITIONAL([WITH_TESTS], [test x${with_tests} = xyes]) AS_IF([test x${with_tests} = xyes], [AX_CXX_COMPILE_STDCXX_11([noext], [mandatory])]) AS_VAR_SET([EXPATCFG_ON_MINGW],[no]) AS_CASE("${host_os}", [mingw*], [AS_VAR_SET([EXPATCFG_ON_MINGW],[yes]) AC_MSG_NOTICE([detected OS: MinGW])]) AM_CONDITIONAL([MINGW], [test x${EXPATCFG_ON_MINGW} = xyes]) dnl Note: Prefix "_INTERNAL_" here means exclusive use inside of file configure.ac AM_CONDITIONAL([UNICODE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE >/dev/null]) AM_CONDITIONAL([_INTERNAL_UNICODE_WCHAR_T], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_UNICODE_WCHAR_T >/dev/null]) AM_CONDITIONAL([_INTERNAL_MIN_SIZE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_MIN_SIZE >/dev/null]) AM_CONDITIONAL([_INTERNAL_LARGE_SIZE], [echo -- "${CPPFLAGS}${CFLAGS}" | ${FGREP} XML_LARGE_SIZE >/dev/null]) LT_LIB_M AC_ARG_WITH([libbsd], [AS_HELP_STRING([--with-libbsd], [utilize libbsd (for arc4random_buf)])], [], [with_libbsd=no]) AS_IF([test "x${with_libbsd}" != xno], [AC_CHECK_LIB([bsd], [arc4random_buf], [], [AS_IF([test "x${with_libbsd}" = xyes], [AC_MSG_ERROR([Enforced use of libbsd cannot be satisfied.])])])]) AC_MSG_CHECKING([for arc4random_buf (BSD, libbsd or glibc 2.36+)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #if defined(HAVE_LIBBSD) # include <bsd/stdlib.h> #else # include <stdlib.h> /* for arc4random_buf on BSD */ #endif int main(void) { char dummy[[123]]; // double brackets for m4 arc4random_buf(dummy, 0U); return 0; } ])], [AC_DEFINE([HAVE_ARC4RANDOM_BUF], [1], [Define to 1 if you have the `arc4random_buf' function.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AC_MSG_CHECKING([for arc4random (BSD, macOS, libbsd or glibc 2.36+)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #if defined(HAVE_LIBBSD) # include <bsd/stdlib.h> #else # include <stdlib.h> #endif int main(void) { arc4random(); return 0; } ])], [AC_DEFINE([HAVE_ARC4RANDOM], [1], [Define to 1 if you have the `arc4random' function.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])]) AC_ARG_WITH([getrandom], [AS_HELP_STRING([--with-getrandom], [enforce the use of getrandom function in the system @<:@default=check@:>@]) AS_HELP_STRING([--without-getrandom], [skip auto detect of getrandom @<:@default=check@:>@])], [], [with_getrandom=check]) AS_IF([test "x$with_getrandom" != xno], [AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #include <stdlib.h> /* for NULL */ #include <sys/random.h> int main(void) { return getrandom(NULL, 0U, 0U); } ])], [AC_DEFINE([HAVE_GETRANDOM], [1], [Define to 1 if you have the `getrandom' function.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AS_IF([test "x$with_getrandom" = xyes], [AC_MSG_ERROR([enforced the use of getrandom --with-getrandom, but not detected])])])]) AC_ARG_WITH([sys_getrandom], [AS_HELP_STRING([--with-sys-getrandom], [enforce the use of syscall SYS_getrandom function in the system @<:@default=check@:>@]) AS_HELP_STRING([--without-sys-getrandom], [skip auto detect of syscall SYS_getrandom @<:@default=check@:>@])], [], [with_sys_getrandom=check]) AS_IF([test "x$with_sys_getrandom" != xno], [AC_MSG_CHECKING([for syscall SYS_getrandom (Linux 3.17+)]) AC_LINK_IFELSE([AC_LANG_SOURCE([ #define _GNU_SOURCE #include <stdlib.h> /* for NULL */ #include <unistd.h> /* for syscall */ #include <sys/syscall.h> /* for SYS_getrandom */ int main(void) { syscall(SYS_getrandom, NULL, 0, 0); return 0; } ])], [AC_DEFINE([HAVE_SYSCALL_GETRANDOM], [1], [Define to 1 if you have `syscall' and `SYS_getrandom'.]) AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AS_IF([test "x$with_sys_getrandom" = xyes], [AC_MSG_ERROR([enforced the use of syscall SYS_getrandom --with-sys-getrandom, but not detected])])])]) dnl Only needed for xmlwf: AC_CHECK_HEADERS(fcntl.h unistd.h) AC_TYPE_OFF_T AC_FUNC_MMAP AS_IF([test "$ac_cv_func_mmap_fixed_mapped" = "yes"], [AS_VAR_SET(FILEMAP,unixfilemap)], [AS_VAR_SET(FILEMAP,readfilemap)]) AC_SUBST(FILEMAP) dnl Some basic configuration: AC_DEFINE([XML_NS], 1, [Define to make XML Namespaces functionality available.]) AC_DEFINE([XML_GE], 1, [Define as 1/0 to enable/disable support for general entities.]) AC_DEFINE([XML_DTD], 1, [Define to make parameter entity parsing functionality available.]) AC_DEFINE([XML_DEV_URANDOM], 1, [Define to include code reading entropy from `/dev/urandom'.]) AC_ARG_ENABLE([xml-attr-info], [AS_HELP_STRING([--enable-xml-attr-info], [Enable retrieving the byte offsets for attribute names and values @<:@default=no@:>@])], [], [enable_xml_attr_info=no]) AS_IF([test "x${enable_xml_attr_info}" = "xyes"], [AC_DEFINE([XML_ATTR_INFO], 1, [Define to allow retrieving the byte offsets for attribute names and values.])]) AC_ARG_ENABLE([xml-context], AS_HELP_STRING([--enable-xml-context @<:@COUNT@:>@], [Retain context around the current parse point; default is enabled and a size of 1024 bytes]) AS_HELP_STRING([--disable-xml-context], [Do not retain context around the current parse point]), [enable_xml_context=${enableval}]) AS_IF([test "x${enable_xml_context}" != "xno"], [AS_IF([test "x${enable_xml_context}" = "xyes" \ -o "x${enable_xml_context}" = "x"], [AS_VAR_SET(enable_xml_context,1024)])], [AS_VAR_SET(enable_xml_context,0)]) AC_DEFINE_UNQUOTED([XML_CONTEXT_BYTES], [${enable_xml_context}], [Define to specify how much context to retain around the current parse point, 0 to disable.]) AC_ARG_WITH([docbook], [AS_HELP_STRING([--with-docbook], [enforce XML to man page compilation @<:@default=check@:>@]) AS_HELP_STRING([--without-docbook], [skip XML to man page compilation @<:@default=check@:>@])], [], [with_docbook=check]) AC_ARG_VAR([DOCBOOK_TO_MAN], [docbook2x-man command]) AS_IF([test "x$with_docbook" != xno], [AC_CHECK_PROGS([DOCBOOK_TO_MAN], [docbook2x-man db2x_docbook2man docbook2man docbook-to-man])]) AS_IF([test "x${DOCBOOK_TO_MAN}" = x -a "x$with_docbook" = xyes], [AC_MSG_ERROR([Required program 'docbook2x-man' not found.])]) AS_IF([test "x${DOCBOOK_TO_MAN}" != x -a "x$with_docbook" != xno], [AS_IF([${DOCBOOK_TO_MAN} --help | grep -i -q -F sgmlbase], [AC_MSG_ERROR([Your local ${DOCBOOK_TO_MAN} was found to work with SGML rather than XML. Please install docbook2X and use variable DOCBOOK_TO_MAN to point configure to command docbook2x-man of docbook2X. Or use DOCBOOK_TO_MAN="xmlto man --skip-validation" if you have xmlto around. You can also configure using --without-docbook if you can do without a man page for xmlwf.])])]) dnl This will make sure that a release tarball shipping a pre-rendered xmlwf man page will dnl get it installed, when no working flavor of docbook2man is available (or wanted). dnl This relies on file xmlwf.1 being at least as recent as its source file xmlwf.xml. AS_IF([test -f "${srcdir}"/doc/xmlwf.1], [AM_CONDITIONAL(WITH_MANPAGE, [true]) AS_IF([test "x$with_docbook" = xno -o "x${DOCBOOK_TO_MAN}" = x], [AM_CONDITIONAL(WITH_PREBUILT_MANPAGE, [true]) AM_CONDITIONAL(WITH_DISTRIBUTABLE_MANPAGE, [false])], [AM_CONDITIONAL(WITH_PREBUILT_MANPAGE, [false]) AM_CONDITIONAL(WITH_DISTRIBUTABLE_MANPAGE, [true])]) ], [AS_IF([test "x$with_docbook" != xno -a "x${DOCBOOK_TO_MAN}" != x], [AM_CONDITIONAL(WITH_MANPAGE, [true]) AM_CONDITIONAL(WITH_DISTRIBUTABLE_MANPAGE, [true])], [AM_CONDITIONAL(WITH_MANPAGE, [false]) AM_CONDITIONAL(WITH_DISTRIBUTABLE_MANPAGE, [false])]) AM_CONDITIONAL(WITH_PREBUILT_MANPAGE, [false])]) dnl Configure CMake file templates dnl NOTE: The *_TRUE variables read here are Automake conditionals dnl that are either set to "" when enabled or to "#" when disabled dnl (because they are used to dynamically comment out certain things) AS_IF([test "x${enable_xml_attr_info}" = xyes], [EXPAT_ATTR_INFO=ON], [EXPAT_ATTR_INFO=OFF]) EXPAT_DTD=ON AS_IF([test "x${_INTERNAL_LARGE_SIZE_TRUE}" = x], [EXPAT_LARGE_SIZE=ON], [EXPAT_LARGE_SIZE=OFF]) AS_IF([test "x${_INTERNAL_MIN_SIZE_TRUE}" = x], [EXPAT_MIN_SIZE=ON], [EXPAT_MIN_SIZE=OFF]) EXPAT_NS=ON AS_IF([test "x${enable_xml_context}" != xno], [EXPAT_CONTEXT_BYTES=${enable_xml_context}], [EXPAT_CONTEXT_BYTES=OFF]) AS_IF([test "x${UNICODE_TRUE}" = x], [AS_IF( [test "x${_INTERNAL_UNICODE_WCHAR_T_TRUE}" = x], [EXPAT_CHAR_TYPE=wchar_t], [EXPAT_CHAR_TYPE=ushort])], [EXPAT_CHAR_TYPE=char]) PACKAGE_INIT="${srcdir}"/cmake/autotools/expat-package-init.cmake LIBDIR_BASENAME="$(basename "${libdir}")" SO_MAJOR="$(expr "${LIBCURRENT}" - "${LIBAGE}")" SO_MINOR="${LIBAGE}" SO_PATCH="${LIBREVISION}" AC_SUBST([EXPAT_ATTR_INFO]) AC_SUBST([EXPAT_DTD]) AC_SUBST([EXPAT_LARGE_SIZE]) AC_SUBST([EXPAT_MIN_SIZE]) AC_SUBST([EXPAT_NS]) AC_SUBST([EXPAT_CONTEXT_BYTES]) AC_SUBST([EXPAT_CHAR_TYPE]) AC_SUBST_FILE([PACKAGE_INIT]) AC_SUBST([LIBDIR_BASENAME]) AC_SUBST([SO_MAJOR]) AC_SUBST([SO_MINOR]) AC_SUBST([SO_PATCH]) dnl The canonical way of doing this is AC_CHECK_SIZEOF(void *), but dnl that adds SIZEOF_VOID_P to expat_config.h.in, making it difficult dnl to have 32-bit and 64-bit versions of libexpat installed on the dnl same system with a single, shared copy of the header. AC_COMPUTE_INT(SIZEOF_VOID_P, [sizeof(void *)]) AC_SUBST([SIZEOF_VOID_P]) dnl write the Automake flags we set AC_SUBST([AM_CPPFLAGS]) AC_SUBST([AM_CFLAGS]) AC_SUBST([AM_CXXFLAGS]) AC_SUBST([AM_LDFLAGS]) dnl Emulate the use of CMAKE_SHARED_LIBRARY_PREFIX under CMake AC_MSG_CHECKING([for shared library name prefix]) AS_CASE("${host_os}", [cygwin*], [CMAKE_SHARED_LIBRARY_PREFIX=cyg], [CMAKE_SHARED_LIBRARY_PREFIX=lib]) AC_MSG_RESULT([${CMAKE_SHARED_LIBRARY_PREFIX}]) AC_SUBST([CMAKE_SHARED_LIBRARY_PREFIX]) AS_CASE("${host_os}", [darwin*], [ CMAKE_SOURCE=cmake/autotools/expat__macos.cmake.in CMAKE_NOCONFIG_SOURCE=cmake/autotools/expat-noconfig__macos.cmake.in ], [mingw*|cygwin*], [ CMAKE_SOURCE=cmake/autotools/expat__windows.cmake.in CMAKE_NOCONFIG_SOURCE=cmake/autotools/expat-noconfig__windows.cmake.in ], [ CMAKE_SOURCE=cmake/autotools/expat__linux.cmake.in CMAKE_NOCONFIG_SOURCE=cmake/autotools/expat-noconfig__linux.cmake.in ]) AC_CONFIG_FILES([Makefile] [expat.pc] [cmake/expat-config.cmake] [cmake/autotools/expat.cmake:${CMAKE_SOURCE}] [cmake/autotools/expat-config-version.cmake] [cmake/autotools/expat-noconfig.cmake:${CMAKE_NOCONFIG_SOURCE}] [doc/Makefile] [examples/Makefile] [lib/Makefile] [tests/Makefile] [tests/benchmark/Makefile] [xmlwf/Makefile]) AC_CONFIG_FILES([run.sh], [chmod +x run.sh]) AC_OUTPUT AC_MSG_NOTICE([ Automake flags (can be overridden by user flags): [AM_CPPFLAGS]: ${AM_CPPFLAGS} [AM_CFLAGS]: ${AM_CFLAGS} [AM_CXXFLAGS]: ${AM_CXXFLAGS} [AM_LDFLAGS]: ${AM_LDFLAGS} User flags (override Automake flags on conflict): CPPFLAGS: ${CPPFLAGS} CFLAGS: ${CFLAGS} CXXFLAGS: ${CXXFLAGS} LDFLAGS: ${LDFLAGS}])
