141 lines
5.3 KiB
CMake
141 lines
5.3 KiB
CMake
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macro(SDL_DetectCompiler)
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set(USE_CLANG FALSE)
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set(USE_GCC FALSE)
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set(USE_INTELCC FALSE)
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set(USE_QCC FALSE)
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if(CMAKE_C_COMPILER_ID MATCHES "Clang|IntelLLVM")
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set(USE_CLANG TRUE)
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# Visual Studio 2019 v16.2 added support for Clang/LLVM.
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# Check if a Visual Studio project is being generated with the Clang toolset.
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if(MSVC)
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set(MSVC_CLANG TRUE)
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endif()
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elseif(CMAKE_COMPILER_IS_GNUCC)
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set(USE_GCC TRUE)
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elseif(CMAKE_C_COMPILER_ID MATCHES "^Intel$")
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set(USE_INTELCC TRUE)
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elseif(CMAKE_C_COMPILER_ID MATCHES "QCC")
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set(USE_QCC TRUE)
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endif()
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endmacro()
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function(sdl_target_compile_option_all_languages TARGET OPTION)
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target_compile_options(${TARGET} PRIVATE "$<$<COMPILE_LANGUAGE:C,CXX>:${OPTION}>")
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if(CMAKE_OBJC_COMPILER)
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target_compile_options(${TARGET} PRIVATE "$<$<COMPILE_LANGUAGE:OBJC>:${OPTION}>")
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endif()
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endfunction()
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function(SDL_AddCommonCompilerFlags TARGET)
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option(SDL_WERROR "Enable -Werror" OFF)
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if(USE_GCC OR USE_CLANG OR USE_INTELCC OR USE_QCC)
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if(MINGW)
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# See if GCC's -gdwarf-4 is supported
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# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101377 for why this is needed on Windows
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cmake_push_check_state()
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check_c_compiler_flag("-gdwarf-4" HAVE_GDWARF_4)
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if(HAVE_GDWARF_4)
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target_compile_options(${TARGET} PRIVATE "-gdwarf-4")
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endif()
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cmake_pop_check_state()
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endif()
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# Check for -Wall first, so later things can override pieces of it.
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# Note: clang-cl treats -Wall as -Weverything (which is very loud),
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# /W3 as -Wall, and /W4 as -Wall -Wextra. So: /W3 is enough.
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check_c_compiler_flag(-Wall HAVE_GCC_WALL)
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if(MSVC_CLANG)
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target_compile_options(${TARGET} PRIVATE "/W3")
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elseif(HAVE_GCC_WALL)
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sdl_target_compile_option_all_languages(${TARGET} "-Wall")
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if(HAIKU)
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sdl_target_compile_option_all_languages(${TARGET} "-Wno-multichar")
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endif()
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endif()
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check_c_compiler_flag(-Wundef HAVE_GCC_WUNDEF)
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if(HAVE_GCC_WUNDEF)
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sdl_target_compile_option_all_languages(${TARGET} "-Wundef")
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endif()
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check_c_compiler_flag(-fno-strict-aliasing HAVE_GCC_NO_STRICT_ALIASING)
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if(HAVE_GCC_NO_STRICT_ALIASING)
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sdl_target_compile_option_all_languages(${TARGET} "-fno-strict-aliasing")
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endif()
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check_c_compiler_flag(-Wdocumentation HAVE_GCC_WDOCUMENTATION)
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if(HAVE_GCC_WDOCUMENTATION)
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if(SDL_WERROR)
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check_c_compiler_flag(-Werror=documentation HAVE_GCC_WERROR_DOCUMENTATION)
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if(HAVE_GCC_WERROR_DOCUMENTATION)
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sdl_target_compile_option_all_languages(${TARGET} "-Werror=documentation")
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endif()
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endif()
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sdl_target_compile_option_all_languages(${TARGET} "-Wdocumentation")
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endif()
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check_c_compiler_flag(-Wdocumentation-unknown-command HAVE_GCC_WDOCUMENTATION_UNKNOWN_COMMAND)
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if(HAVE_GCC_WDOCUMENTATION_UNKNOWN_COMMAND)
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if(SDL_WERROR)
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check_c_compiler_flag(-Werror=documentation-unknown-command HAVE_GCC_WERROR_DOCUMENTATION_UNKNOWN_COMMAND)
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if(HAVE_GCC_WERROR_DOCUMENTATION_UNKNOWN_COMMAND)
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sdl_target_compile_option_all_languages(${TARGET} "-Werror=documentation-unknown-command")
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endif()
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endif()
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sdl_target_compile_option_all_languages(${TARGET} "-Wdocumentation-unknown-command")
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endif()
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check_c_compiler_flag(-fcomment-block-commands=threadsafety HAVE_GCC_COMMENT_BLOCK_COMMANDS)
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if(HAVE_GCC_COMMENT_BLOCK_COMMANDS)
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sdl_target_compile_option_all_languages(${TARGET} "-fcomment-block-commands=threadsafety")
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else()
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check_c_compiler_flag(/clang:-fcomment-block-commands=threadsafety HAVE_CLANG_COMMENT_BLOCK_COMMANDS)
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if(HAVE_CLANG_COMMENT_BLOCK_COMMANDS)
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sdl_target_compile_option_all_languages(${TARGET} "/clang:-fcomment-block-commands=threadsafety")
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endif()
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endif()
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check_c_compiler_flag(-Wshadow HAVE_GCC_WSHADOW)
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if(HAVE_GCC_WSHADOW)
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sdl_target_compile_option_all_languages(${TARGET} "-Wshadow")
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endif()
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check_c_compiler_flag(-Wunused-local-typedefs HAVE_GCC_WUNUSED_LOCAL_TYPEDEFS)
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if(HAVE_GCC_WUNUSED_LOCAL_TYPEDEFS)
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sdl_target_compile_option_all_languages(${TARGET} "-Wno-unused-local-typedefs")
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endif()
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check_c_compiler_flag(-Wimplicit-fallthrough HAVE_GCC_WIMPLICIT_FALLTHROUGH)
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if(HAVE_GCC_WIMPLICIT_FALLTHROUGH)
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sdl_target_compile_option_all_languages(${TARGET} "-Wimplicit-fallthrough")
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endif()
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endif()
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if(SDL_WERROR)
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if(MSVC)
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check_c_compiler_flag(/WX HAVE_WX)
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if(HAVE_WX)
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target_compile_options(${TARGET} PRIVATE "/WX")
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endif()
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elseif(USE_GCC OR USE_CLANG OR USE_INTELCC OR USE_QNX)
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check_c_compiler_flag(-Werror HAVE_WERROR)
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if(HAVE_WERROR)
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sdl_target_compile_option_all_languages(${TARGET} "-Werror")
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endif()
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endif()
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endif()
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if(USE_CLANG)
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check_c_compiler_flag("-fcolor-diagnostics" COMPILER_SUPPORTS_FCOLOR_DIAGNOSTICS)
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if(COMPILER_SUPPORTS_FCOLOR_DIAGNOSTICS)
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sdl_target_compile_option_all_languages(${TARGET} "-fcolor-diagnostics")
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endif()
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else()
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check_c_compiler_flag("-fdiagnostics-color=always" COMPILER_SUPPORTS_FDIAGNOSTICS_COLOR_ALWAYS)
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if(COMPILER_SUPPORTS_FDIAGNOSTICS_COLOR_ALWAYS)
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sdl_target_compile_option_all_languages(${TARGET} "-fdiagnostics-color=always")
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endif()
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endif()
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endfunction()
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