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cmake: Fix check_and_add_flag() with Visual Studio generators

This commit is contained in:
Florent Castelli 2017-02-20 04:18:49 +01:00
parent 9572a5105d
commit 33ceb042b7
1 changed files with 12 additions and 2 deletions
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14
CMake/CheckAndAddFlag.cmake
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@ -27,13 +27,23 @@ function(check_and_add_flag var flag)
message(FATAL_ERROR "check_and_add_flag called with incorrect arguments: ${ARGN}")
endif()
set(is_c "$<COMPILE_LANGUAGE:C>")
set(is_cxx "$<COMPILE_LANGUAGE:CXX>")
# The Visual Studio generators don't support COMPILE_LANGUAGE
# So we fail all the C flags and only actually test CXX ones
if(CMAKE_GENERATOR MATCHES "Visual Studio")
set(is_c "0")
set(is_cxx "1")
endif()
check_c_compiler_flag(${flag} FLAG_C_${var})
if(FLAG_C_${var})
add_compile_options("$<$<AND:$<COMPILE_LANGUAGE:C>,${genexp_config_test}>:${flag}>")
add_compile_options("$<$<AND:${is_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}>")
add_compile_options("$<$<AND:${is_cxx},${genexp_config_test}>:${flag}>")
endif()
endfunction()