cmake: detect CPU architecture in 1 compilation

2024-05-26 22:40:47 +02:00
parent 3af4f120d0
commit bba76859f5
8 changed files with 209 additions and 154 deletions
--- a/cmake/sdlcpu.cmake
+++ b/cmake/sdlcpu.cmake
@@ -0,0 +1,149 @@
+function(SDL_DetectTargetCPUArchitectures DETECTED_ARCHS)
+
+  set(DETECTABLE_ARCHS ARM32 ARM64 EMSCRIPTEN LOONGARCH64 POWERPC32 POWERPC64 X86 X64)
+
+  if(APPLE AND CMAKE_OSX_ARCHITECTURES)
+    foreach(arch IN LISTS DETECTABLE_ARCHS)
+      set(SDL_CPU_${arch} "0")
+    endforeach()
+    set(detected_archs)
+    foreach(osx_arch IN LISTS CMAKE_OSX_ARCHITECTURES)
+      if(osx_arch STREQUAL "x86_64")
+        set(SDL_CPU_X64 "1")
+        list(APPEND detected_archs "X64")
+      elseif(osx_arch STREQUAL "arm64")
+        set(SDL_CPU_ARM64 "1")
+        list(APPEND detected_archs "ARM64")
+      endif()
+    endforeach()
+    set("${DETECTED_ARCHS}" "${detected_archs}" PARENT_SCOPE)
+    return()
+  endif()
+
+  set(detected_archs)
+  foreach(arch IN LISTS DETECTABLE_ARCHS)
+    if(SDL_CPU_${arch})
+      list(APPEND detected_archs "${arch}")
+    endif()
+  endforeach()
+
+  if(detected_archs)
+    set("${DETECTED_ARCHS}" "${detected_archs}" PARENT_SCOPE)
+    return()
+  endif()
+
+  set(src_arch_detect [=====[
+
+#if defined(__arm__) || defined(_M_ARM)
+#define ARCH_ARM32 "1"
+#else
+#define ARCH_ARM32 "0"
+#endif
+const char *arch_arm32 = "INFO<ARM32=" ARCH_ARM32 ">";
+
+#if defined(__aarch64__) || defined(_M_ARM64)
+#define ARCH_ARM64 "1"
+#else
+#define ARCH_ARM64 "0"
+#endif
+const char *arch_arm64 = "INFO<ARM64=" ARCH_ARM64 ">";
+
+#if defined(__EMSCRIPTEN__)
+#define ARCH_EMSCRIPTEN "1"
+#else
+#define ARCH_EMSCRIPTEN "0"
+#endif
+const char *arch_emscripten = "INFO<EMSCRIPTEN=" ARCH_EMSCRIPTEN ">";
+
+#if defined(__loongarch64)
+#define ARCH_LOONGARCH64 "1"
+#else
+#define ARCH_LOONGARCH64 "0"
+#endif
+const char *arch_loongarch64 = "INFO<LOONGARCH64=" ARCH_LOONGARCH64 ">";
+
+#if (defined(__PPC__) || defined(__powerpc__)) && !defined(__powerpc64__)
+#define ARCH_POWERPC32 "1"
+#else
+#define ARCH_POWERPC32 "0"
+#endif
+const char *arch_powerpc32 = "INFO<ARCH_POWERPC32=" ARCH_POWERPC32 ">";
+
+#if defined(__PPC64__) || defined(__powerpc64__)
+#define ARCH_POWERPC64 "1"
+#else
+#define ARCH_POWERPC64 "0"
+#endif
+const char *arch_powerpc64 = "INFO<POWERPC64=" ARCH_POWERPC64 ">";
+
+#if defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) ||defined( __i386) || defined(_M_IX86)
+#define ARCH_X86 "1"
+#else
+#define ARCH_X86 "0"
+#endif
+const char *arch_x86 = "INFO<X86=" ARCH_X86 ">";
+
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)
+#define ARCH_X64 "1"
+#else
+#define ARCH_X64 "0"
+#endif
+const char *arch_x64 = "INFO<X64=" ARCH_X64 ">";
+
+int main(int argc, char *argv[]) {
+  (void) argv;
+  int result = argc;
+  result += arch_arm32[argc];
+  result += arch_arm64[argc];
+  result += arch_emscripten[argc];
+  result += arch_loongarch64[argc];
+  result += arch_powerpc32[argc];
+  result += arch_powerpc64[argc];
+  result += arch_x86[argc];
+  result += arch_x64[argc];
+  return result;
+}
+]=====])
+
+  set(path_src_arch_detect "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/CMakeTmp/SDL_detect_arch.c")
+  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(msg "Detecting Target CPU Architecture")
+  message(STATUS "${msg}")
+
+  try_compile(COMPILED_RES
+          "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/CMakeTmp/SDL_detect_arch"
+          SOURCES "${path_src_arch_detect}"
+          COPY_FILE "${path_bin_arch_detect}"
+          )
+  if(NOT COMPILED_RES)
+    message(STATUS "${msg} - <ERROR>")
+    message(WARNING "Failed to compile source detecting the target CPU architecture")
+  endif()
+
+  set(re "INFO<([A-Z0-9]+)=([01])>")
+  file(STRINGS "${path_bin_arch_detect}" infos REGEX "${re}")
+
+  set(detected_archs)
+
+  foreach(info_arch_01 IN LISTS infos)
+    string(REGEX MATCH "${re}" A "${info_arch_01}")
+    if(NOT "${CMAKE_MATCH_1}" IN_LIST DETECTABLE_ARCHS)
+      message(WARNING "Unknown architecture: \"${CMAKE_MATCH_1}\"")
+      continue()
+    endif()
+    set(arch "${CMAKE_MATCH_1}")
+    set(arch_01 "${CMAKE_MATCH_2}")
+    if(arch_01)
+      list(APPEND detected_archs "${arch}")
+    endif()
+    set("SDL_CPU_${arch}" "${arch_01}" CACHE BOOL "Detected architecture ${arch}")
+  endforeach()
+
+  message(STATUS "${msg} - ${detected_archs}")
+
+  set("${DETECTED_ARCHS}" "${detected_archs}" PARENT_SCOPE)
+
+endfunction()