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