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CMake: adds C23 feature detection and compatibility workarounds for Apple clang 17

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Carter Li
2026-08-07 10:34:23 +08:00
parent ba60d7975c
commit 39b3dc001a
1 changed files with 16 additions and 2 deletions
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CMakeLists.txt
+16 -2
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@@ -1469,10 +1469,24 @@ endforeach()
include(CheckCSourceCompiles)
check_c_source_compiles("int main(void){int arr[1];return _Countof(arr);}" COMPILER_SUPPORTS_COUNT_OF)
if(COMPILER_SUPPORTS_COUNT_OF)
message(STATUS "_Countof is supported by the compiler")
message(STATUS "C2Y _Countof is supported by the compiler")
target_compile_definitions(libfastfetch PUBLIC FF_SUPPORTS_COUNT_OF=1)
else()
message(STATUS "_Countof is NOT supported by the compiler")
message(STATUS "C2Y _Countof is NOT supported by the compiler")
endif()
# Test C23 compiler support
check_c_source_compiles("enum my_enum: long{MY_ENUM_ZERO}; void test(void*p){} int main(int,const char**){[[gnu::cleanup(test)]] void* x=nullptr; return (int)MY_ENUM_ZERO;}" COMPILER_SUPPORTS_C23)
if(NOT COMPILER_SUPPORTS_C23)
message(FATAL_ERROR "Compiler does not support C23. Please use a newer compiler.")
endif()
# A hack for AppleClang 17, which supports most C23 features we use except for the `auto` keyword.
# See https://github.com/Homebrew/homebrew-core/pull/297403
check_c_source_compiles("int main(void){auto v = 12.34; return (int)v;}" COMPILER_SUPPORTS_AUTO)
if(NOT COMPILER_SUPPORTS_AUTO)
message(WARNING "Compiler does not support C23 'auto' keyword. A workaround will be applied.")
target_compile_definitions(libfastfetch PUBLIC $<$<COMPILE_LANGUAGE:C>:auto=__auto_type>)
endif()
if(yyjson_FOUND)