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function(SDL_DetectTargetCPUArchitectures DETECTED_ARCHS)
set(known_archs EMSCRIPTEN ARM32 ARM64 ARM64EC LOONGARCH64 POWERPC32 POWERPC64 X86 X64)
if(APPLE AND CMAKE_OSX_ARCHITECTURES)
foreach(known_arch IN LISTS known_archs)
set(SDL_CPU_${known_arch} "0")
endforeach()
set(detected_archs)
foreach(osx_arch IN LISTS CMAKE_OSX_ARCHITECTURES)
if(osx_arch STREQUAL "x86_64")
set(SDL_CPU_X64 "1")
list(APPEND detected_archs "X64")
elseif(osx_arch STREQUAL "arm64")
set(SDL_CPU_ARM64 "1")
list(APPEND detected_archs "ARM64")
endif()
endforeach()
set("${DETECTED_ARCHS}" "${detected_archs}" PARENT_SCOPE)
return()
endif()
set(detected_archs)
foreach(known_arch IN LISTS known_archs)
if(SDL_CPU_${known_arch})
list(APPEND detected_archs "${known_arch}")
endif()
endforeach()
if(detected_archs)
set("${DETECTED_ARCHS}" "${detected_archs}" PARENT_SCOPE)
return()
endif()
set(arch_check_ARM32 "defined(__arm__) || defined(_M_ARM)")
set(arch_check_ARM64 "defined(__aarch64__) || defined(_M_ARM64)")
set(arch_check_ARM64EC "defined(_M_ARM64EC)")
set(arch_check_EMSCRIPTEN "defined(__EMSCRIPTEN__)")
set(arch_check_LOONGARCH64 "defined(__loongarch64)")
set(arch_check_POWERPC32 "(defined(__PPC__) || defined(__powerpc__)) && !defined(__powerpc64__)")
set(arch_check_POWERPC64 "defined(__PPC64__) || defined(__powerpc64__)")
set(arch_check_X86 "defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) ||defined( __i386) || defined(_M_IX86)")
set(arch_check_X64 "(defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)) && !defined(_M_ARM64EC)")
set(src_vars "")
set(src_main "")
foreach(known_arch IN LISTS known_archs)
set(detected_${known_arch} "0")
string(APPEND src_vars "
#if ${arch_check_${known_arch}}
#define ARCH_${known_arch} \"1\"
#else
#define ARCH_${known_arch} \"0\"
#endif
const char *arch_${known_arch} = \"INFO<${known_arch}=\" ARCH_${known_arch} \">\";
")
string(APPEND src_main "
result += arch_${known_arch}[argc];")
endforeach()
set(src_arch_detect "${src_vars}
int main(int argc, char *argv[]) {
int result = 0;
(void)argv;
${src_main}
return result;
}")
if(CMAKE_C_COMPILER)
set(ext ".c")
elseif(CMAKE_CXX_COMPILER)
set(ext ".cpp")
else()
enable_language(C)
set(ext ".c")
endif()
set(path_src_arch_detect "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/CMakeTmp/SDL_detect_arch${ext}")
file(WRITE "${path_src_arch_detect}" "${src_arch_detect}")
set(path_dir_arch_detect "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/CMakeTmp/SDL_detect_arch")
set(path_bin_arch_detect "${path_dir_arch_detect}/bin")
set(detected_archs)
set(msg "Detecting Target CPU Architecture")
message(STATUS "${msg}")
include(CMakePushCheckState)
set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")
cmake_push_check_state(RESET)
try_compile(SDL_CPU_CHECK_ALL
"${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/CMakeTmp/SDL_detect_arch"
SOURCES "${path_src_arch_detect}"
COPY_FILE "${path_bin_arch_detect}"
)
cmake_pop_check_state()
if(NOT SDL_CPU_CHECK_ALL)
message(STATUS "${msg} - <ERROR>")
message(WARNING "Failed to compile source detecting the target CPU architecture")
else()
set(re "INFO<([A-Z0-9]+)=([01])>")
file(STRINGS "${path_bin_arch_detect}" infos REGEX "${re}")
foreach(info_arch_01 IN LISTS infos)
string(REGEX MATCH "${re}" A "${info_arch_01}")
if(NOT "${CMAKE_MATCH_1}" IN_LIST known_archs)
message(WARNING "Unknown architecture: \"${CMAKE_MATCH_1}\"")
continue()
endif()
set(arch "${CMAKE_MATCH_1}")
set(arch_01 "${CMAKE_MATCH_2}")
set(detected_${arch} "${arch_01}")
endforeach()
foreach(known_arch IN LISTS known_archs)
if(detected_${known_arch})
list(APPEND detected_archs ${known_arch})
endif()
endforeach()
endif()
if(detected_archs)
foreach(known_arch IN LISTS known_archs)
set("SDL_CPU_${known_arch}" "${detected_${known_arch}}" CACHE BOOL "Detected architecture ${known_arch}")
endforeach()
message(STATUS "${msg} - ${detected_archs}")
else()
include(CheckCSourceCompiles)
cmake_push_check_state(RESET)
foreach(known_arch IN LISTS known_archs)
if(NOT detected_archs)
set(cache_variable "SDL_CPU_${known_arch}")
set(test_src "
int main(int argc, char *argv[]) {
#if ${arch_check_${known_arch}}
return 0;
#else
choke
#endif
}
")
check_c_source_compiles("${test_src}" "${cache_variable}")
if(${cache_variable})
set(SDL_CPU_${known_arch} "1" CACHE BOOL "Detected architecture ${known_arch}")
set(detected_archs ${known_arch})
else()
set(SDL_CPU_${known_arch} "0" CACHE BOOL "Detected architecture ${known_arch}")
endif()
endif()
endforeach()
cmake_pop_check_state()
endif()
set("${DETECTED_ARCHS}" "${detected_archs}" PARENT_SCOPE)
endfunction()
|
