Path: blob/master/CMakeModules/DuckStationUtils.cmake
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include(CheckSourceCompiles)
function(disable_compiler_warnings_for_target target)
if(MSVC)
target_compile_options(${target} PRIVATE "/W0")
else()
target_compile_options(${target} PRIVATE "-w")
endif()
endfunction()
function(detect_operating_system)
message(STATUS "CMake Version: ${CMAKE_VERSION}")
message(STATUS "CMake System Name: ${CMAKE_SYSTEM_NAME}")
# LINUX wasn't added until CMake 3.25.
if (CMAKE_VERSION VERSION_LESS 3.25.0 AND CMAKE_SYSTEM_NAME MATCHES "Linux")
# Have to make it visible in this scope as well for below.
set(LINUX TRUE PARENT_SCOPE)
set(LINUX TRUE)
endif()
if(WIN32)
message(STATUS "Building for Windows.")
elseif(APPLE AND NOT IOS)
message(STATUS "Building for MacOS.")
elseif(LINUX)
message(STATUS "Building for Linux.")
elseif(BSD)
message(STATUS "Building for *BSD.")
else()
message(FATAL_ERROR "Unsupported platform.")
endif()
endfunction()
function(detect_compiler)
if(MSVC AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
set(COMPILER_CLANG_CL TRUE PARENT_SCOPE)
set(IS_SUPPORTED_COMPILER TRUE PARENT_SCOPE)
message(STATUS "Building with Clang-CL.")
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
set(COMPILER_CLANG TRUE PARENT_SCOPE)
set(IS_SUPPORTED_COMPILER TRUE PARENT_SCOPE)
message(STATUS "Building with Clang/LLVM.")
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set(COMPILER_GCC TRUE PARENT_SCOPE)
set(IS_SUPPORTED_COMPILER FALSE PARENT_SCOPE)
message(STATUS "Building with GNU GCC.")
elseif(MSVC)
set(IS_SUPPORTED_COMPILER TRUE PARENT_SCOPE)
message(STATUS "Building with MSVC.")
else()
message(FATAL_ERROR "Unknown compiler: ${CMAKE_CXX_COMPILER_ID}")
endif()
endfunction()
function(detect_architecture)
if(APPLE AND NOT "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
# Universal binaries.
if("x86_64" IN_LIST CMAKE_OSX_ARCHITECTURES)
message(STATUS "Building x86_64 MacOS binaries.")
set(CPU_ARCH_X64 TRUE PARENT_SCOPE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Xarch_x86_64 -msse4.1" PARENT_SCOPE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Xarch_x86_64 -msse4.1" PARENT_SCOPE)
endif()
if("arm64" IN_LIST CMAKE_OSX_ARCHITECTURES)
message(STATUS "Building ARM64 MacOS binaries.")
set(CPU_ARCH_ARM64 TRUE PARENT_SCOPE)
endif()
elseif(("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "amd64" OR
"${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64" OR "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "x86_64") AND
CMAKE_SIZEOF_VOID_P EQUAL 8)
message(STATUS "Building x86_64 binaries.")
set(CPU_ARCH_X64 TRUE PARENT_SCOPE)
if(NOT MSVC OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT DISABLE_SSE4)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse4.1" PARENT_SCOPE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1" PARENT_SCOPE)
elseif(MSVC AND NOT DISABLE_SSE4)
# Clang defines these macros, MSVC does not.
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D__SSE3__ /D__SSE4_1__")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D__SSE3__ /D__SSE4_1__")
endif()
elseif(("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "aarch64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "arm64") AND
CMAKE_SIZEOF_VOID_P EQUAL 8) # Might have an A64 kernel, e.g. Raspbian.
message(STATUS "Building ARM64 binaries.")
set(CPU_ARCH_ARM64 TRUE PARENT_SCOPE)
elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "arm" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv7-a" OR
"${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv7l" OR
(("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "aarch64" OR "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "arm64")
AND CMAKE_SIZEOF_VOID_P EQUAL 4))
message(STATUS "Building ARM32 binaries.")
set(CPU_ARCH_ARM32 TRUE PARENT_SCOPE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -marm -march=armv7-a -mfpu=neon-vfpv4" PARENT_SCOPE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -marm -march=armv7-a -mfpu=neon-vfpv4" PARENT_SCOPE)
elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "riscv64")
message(STATUS "Building RISC-V 64 binaries.")
set(CPU_ARCH_RISCV64 TRUE PARENT_SCOPE)
# Don't want function calls for atomics.
if(COMPILER_GCC)
set(EXTRA_CFLAGS "${EXTRA_CFLAGS} -finline-atomics")
# Still need this, apparently.
link_libraries("-latomic")
endif()
if(NOT "${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
# Frame pointers generate an annoying amount of code on leaf functions.
set(EXTRA_CFLAGS "${EXTRA_CFLAGS} -fomit-frame-pointer")
endif()
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_CFLAGS}" PARENT_SCOPE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EXTRA_CFLAGS}" PARENT_SCOPE)
else()
message(FATAL_ERROR "Unknown system processor: ${CMAKE_SYSTEM_PROCESSOR}")
endif()
endfunction()
function(detect_page_size)
# This is only needed for ARM64, or if the user hasn't overridden it explicitly.
# For universal Apple builds, we use preprocessor macros to determine page size.
# Similar for Windows, except it's always 4KB.
if(NOT CPU_ARCH_ARM64 OR NOT LINUX)
unset(HOST_PAGE_SIZE CACHE)
unset(HOST_PAGE_SIZE PARENT_SCOPE)
unset(HOST_MIN_PAGE_SIZE CACHE)
unset(HOST_MIN_PAGE_SIZE PARENT_SCOPE)
unset(HOST_MAX_PAGE_SIZE CACHE)
unset(HOST_MAX_PAGE_SIZE PARENT_SCOPE)
return()
elseif(DEFINED HOST_PAGE_SIZE)
return()
endif()
if(DEFINED HOST_MIN_PAGE_SIZE OR DEFINED HOST_MAX_PAGE_SIZE)
if(NOT DEFINED HOST_MIN_PAGE_SIZE OR NOT DEFINED HOST_MAX_PAGE_SIZE)
message(FATAL_ERROR "Both HOST_MIN_PAGE_SIZE and HOST_MAX_PAGE_SIZE must be defined.")
endif()
return()
endif()
if(CMAKE_CROSSCOMPILING)
message(WARNING "Cross-compiling and can't determine page size, assuming default.")
return()
endif()
message(STATUS "Determining host page size")
set(detect_page_size_file ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c)
file(WRITE ${detect_page_size_file} "
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main() {
int res = sysconf(_SC_PAGESIZE);
printf(\"%d\", res);
return (res > 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}")
try_run(
detect_page_size_run_result
detect_page_size_compile_result
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}
${detect_page_size_file}
RUN_OUTPUT_VARIABLE detect_page_size_output)
if(NOT detect_page_size_compile_result OR NOT detect_page_size_run_result EQUAL 0)
message(FATAL_ERROR "Could not determine host page size.")
else()
message(STATUS "Host page size: ${detect_page_size_output}")
set(HOST_PAGE_SIZE ${detect_page_size_output} CACHE STRING "Reported host page size")
endif()
endfunction()
function(detect_cache_line_size)
# This is only needed for ARM64, or if the user hasn't overridden it explicitly.
if(NOT CPU_ARCH_ARM64 OR HOST_CACHE_LINE_SIZE)
unset(HOST_CACHE_LINE_SIZE CACHE)
unset(HOST_CACHE_LINE_SIZE PARENT_SCOPE)
return()
endif()
if(NOT LINUX)
# For universal Apple builds, we use preprocessor macros to determine page size.
# Similar for Windows, except it's always 64 bytes.
return()
endif()
if(CMAKE_CROSSCOMPILING)
message(WARNING "Cross-compiling and can't determine cache line size, assuming default.")
return()
endif()
message(STATUS "Determining host cache line size")
set(detect_cache_line_size_file ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c)
file(WRITE ${detect_cache_line_size_file} "
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main() {
int l1i = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
int l1d = sysconf(_SC_LEVEL1_ICACHE_LINESIZE);
int res = (l1i > l1d) ? l1i : l1d;
for (int index = 0; index < 16; index++) {
char buf[128];
snprintf(buf, sizeof(buf), \"/sys/devices/system/cpu/cpu0/cache/index%d/coherency_line_size\", index);
FILE* fp = fopen(buf, \"rb\");
if (!fp)
break;
fread(buf, sizeof(buf), 1, fp);
fclose(fp);
int val = atoi(buf);
res = (val > res) ? val : res;
}
printf(\"%d\", res);
return (res > 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}")
try_run(
detect_cache_line_size_run_result
detect_cache_line_size_compile_result
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}
${detect_cache_line_size_file}
RUN_OUTPUT_VARIABLE detect_cache_line_size_output)
if(NOT detect_cache_line_size_compile_result OR NOT detect_cache_line_size_run_result EQUAL 0)
message(FATAL_ERROR "Could not determine host cache line size.")
else()
message(STATUS "Host cache line size: ${detect_cache_line_size_output}")
set(HOST_CACHE_LINE_SIZE ${detect_cache_line_size_output} CACHE STRING "Reported host cache line size")
endif()
endfunction()
function(get_scm_version)
if(SCM_VERSION)
return()
endif()
find_package(Git)
if(EXISTS "${PROJECT_SOURCE_DIR}/.git" AND GIT_FOUND)
execute_process(
COMMAND ${GIT_EXECUTABLE} describe --dirty
WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
OUTPUT_VARIABLE LOCAL_SCM_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
)
endif()
if(NOT LOCAL_SCM_VERSION)
set(SCM_VERSION "unknown" PARENT_SCOPE)
else()
set(SCM_VERSION ${LOCAL_SCM_VERSION} PARENT_SCOPE)
endif()
endfunction()
function(install_imported_dep_library name)
get_target_property(SONAME "${name}" IMPORTED_SONAME_RELEASE)
get_target_property(LOCATION "${name}" IMPORTED_LOCATION_RELEASE)
# Only install if it's not a system library.
foreach(path ${CMAKE_PREFIX_PATH})
if (NOT "${LOCATION}" MATCHES "^${path}")
message(STATUS "Not installing imported system library ${name}")
return()
endif()
endforeach()
message(STATUS "Installing imported library ${SONAME}")
install(FILES "${LOCATION}" RENAME "${SONAME}" DESTINATION "${CMAKE_INSTALL_LIBDIR}")
endfunction()
function(add_debug_symbol_flag var)
# CMake's regex engine is missing so many features...
set(value "${${var}}")
if (NOT " ${value} " MATCHES " -g[1-3]? ")
message(STATUS "Adding -g1 to ${var}.")
set(${var} "${value} -g1" PARENT_SCOPE)
endif()
endfunction()
function(check_cpp20_feature MACRO MINIMUM_VALUE)
set(CACHE_VAR "CHECK_CPP20_FEATURE_${MACRO}")
if(NOT DEFINED ${CACHE_VAR})
# Create a small source code snippet that fails to compile if the feature is not available.
set(TEMP_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cpp")
file(WRITE "${TEMP_FILE}" "#include <version>
#if !defined(${MACRO}) || ${MACRO} < ${MINIMUM_VALUE}L
#error Missing feature
#endif
")
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
try_compile(HAS_FEATURE
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY} "${TEMP_FILE}"
CXX_STANDARD 20
CXX_STANDARD_REQUIRED TRUE
)
set(${CACHE_VAR} ${HAS_FEATURE} CACHE INTERNAL "Cached feature test result for ${MACRO}")
endif()
if(NOT HAS_FEATURE)
message(FATAL_ERROR "${MACRO} is not supported by your compiler, at least ${MINIMUM_VALUE} is required.")
endif()
endfunction()
function(check_cpp20_attribute ATTRIBUTE MINIMUM_VALUE)
set(CACHE_VAR "CHECK_CPP20_ATTRIBUTE_${MACRO}")
if(NOT DEFINED ${CACHE_VAR})
set(TEMP_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cpp")
file(WRITE "${TEMP_FILE}" "#include <version>
#if !defined(__has_cpp_attribute) || __has_cpp_attribute(${ATTRIBUTE}) < ${MINIMUM_VALUE}L
#error Missing feature
#endif
")
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
try_compile(HAS_FEATURE
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY} "${TEMP_FILE}"
CXX_STANDARD 20
CXX_STANDARD_REQUIRED TRUE
)
set(${CACHE_VAR} ${HAS_FEATURE} CACHE INTERNAL "Cached attribute test result for ${MACRO}")
endif()
if(NOT HAS_FEATURE)
message(FATAL_ERROR "${ATTRIBUTE} is not supported by your compiler, at least ${MINIMUM_VALUE} is required.")
endif()
endfunction()