1 files changed, 156 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/cmake/sdlcpu.cmake b/src/contrib/SDL-3.2.20/cmake/sdlcpu.cmake
new file mode 100644
index 0000000..0c2ca1f
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/cmake/sdlcpu.cmake
@@ -0,0 +1,156 @@
+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()