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cmake: check_and_add_flag supports adding to Debug or Release only

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This commit is contained in:
Florent Castelli 2017-01-25 15:04:00 +01:00
parent c5d4ae6163
commit 00c15d84d6
1 changed files with 35 additions and 10 deletions
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45
CMakeTests/CheckAndAddFlag.cmake
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@ -1,14 +1,39 @@
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
macro(check_and_add_flag var flag)
check_c_compiler_flag(${flag} FLAG_C_${var})
if(FLAG_C_${var})
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
endif()
# check_add_add_flag(<variable> <flag> [DEBUG_ONLY | RELEASE_ONLY])
#
# Add a C or C++ compilation flag to the current scope
#
# Can optionally add the flag to Debug or Release configurations only, use this when
# targeting multi-configuration generators like Visual Studio or Xcode.
# Release configurations means NOT Debug, so it will work for RelWithDebInfo or MinSizeRel too.
#
# If the flag is added successfully, the variables FLAG_C_<variable> and FLAG_CXX_<variable>
# may be set to ON.
#
# Examples:
# check_and_add_flag(FOO -foo)
# check_and_add_flag(ONLYDEBUG -onlydebug DEBUG_ONLY)
# check_and_add_flag(OPTMAX -O9001 RELEASE_ONLY)
check_cxx_compiler_flag(${flag} FLAG_CXX_${var})
if(FLAG_CXX_${var})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
endif()
endmacro()
function(check_and_add_flag var flag)
set(genexp_config_test "1")
if(ARGV2 STREQUAL "DEBUG_ONLY")
set(genexp_config_test "$<CONFIG:Debug>")
elseif(ARGV2 STREQUAL "RELEASE_ONLY")
set(genexp_config_test "$<NOT:$<CONFIG:Debug>>")
elseif(ARGV2)
message(FATAL_ERROR "check_and_add_flag called with incorrect arguments: ${ARGN}")
endif()
check_c_compiler_flag(${flag} FLAG_C_${var})
if(FLAG_C_${var})
add_compile_options("$<$<AND:$<COMPILE_LANGUAGE:C>,${genexp_config_test}>:${flag}>")
endif()
check_cxx_compiler_flag(${flag} FLAG_CXX_${var})
if(FLAG_CXX_${var})
add_compile_options("$<$<AND:$<COMPILE_LANGUAGE:CXX>,${genexp_config_test}>:${flag}>")
endif()
endfunction()