| # HandleLibcxxFlags - A set of macros used to setup the flags used to compile |
| # and link libc++. These macros add flags to the following CMake variables. |
| # - LIBCXX_COMPILE_FLAGS: flags used to compile libc++ |
| # - LIBCXX_LINK_FLAGS: flags used to link libc++ |
| # - LIBCXX_LIBRARIES: libraries to link libc++ to. |
| |
| include(CheckCXXCompilerFlag) |
| include(HandleFlags) |
| |
| unset(add_flag_if_supported) |
| |
| # Add a specified list of flags to both 'LIBCXX_COMPILE_FLAGS' and |
| # 'LIBCXX_LINK_FLAGS'. |
| macro(add_flags) |
| foreach(value ${ARGN}) |
| list(APPEND LIBCXX_COMPILE_FLAGS ${value}) |
| list(APPEND LIBCXX_LINK_FLAGS ${value}) |
| endforeach() |
| endmacro() |
| |
| # If the specified 'condition' is true then add a list of flags to both |
| # 'LIBCXX_COMPILE_FLAGS' and 'LIBCXX_LINK_FLAGS'. |
| macro(add_flags_if condition) |
| if (${condition}) |
| add_flags(${ARGN}) |
| endif() |
| endmacro() |
| |
| # Add each flag in the list to LIBCXX_COMPILE_FLAGS and LIBCXX_LINK_FLAGS |
| # if that flag is supported by the current compiler. |
| macro(add_flags_if_supported) |
| foreach(flag ${ARGN}) |
| mangle_name("${flag}" flagname) |
| check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG") |
| add_flags_if(CXX_SUPPORTS_${flagname}_FLAG ${flag}) |
| endforeach() |
| endmacro() |
| |
| # Add a list of flags to 'LIBCXX_LINK_FLAGS'. |
| macro(add_link_flags) |
| foreach(f ${ARGN}) |
| list(APPEND LIBCXX_LINK_FLAGS ${f}) |
| endforeach() |
| endmacro() |
| |
| # Add a list of libraries or link flags to 'LIBCXX_LIBRARIES'. |
| macro(add_library_flags) |
| foreach(lib ${ARGN}) |
| list(APPEND LIBCXX_LIBRARIES ${lib}) |
| endforeach() |
| endmacro() |
| |
| # if 'condition' is true then add the specified list of libraries and flags |
| # to 'LIBCXX_LIBRARIES'. |
| macro(add_library_flags_if condition) |
| if(${condition}) |
| add_library_flags(${ARGN}) |
| endif() |
| endmacro() |
| |
| # For each specified flag, add that link flag to the provided target. |
| # The flags are added with the given visibility, i.e. PUBLIC|PRIVATE|INTERFACE. |
| function(target_add_link_flags_if_supported target visibility) |
| foreach(flag ${ARGN}) |
| mangle_name("${flag}" flagname) |
| check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${flagname}_FLAG") |
| if (CXX_SUPPORTS_${flagname}_FLAG) |
| target_link_libraries(${target} ${visibility} ${flag}) |
| endif() |
| endforeach() |
| endfunction() |