221 lines
7.0 KiB
CMake
221 lines
7.0 KiB
CMake
if(DRACO_CMAKE_COMPILER_FLAGS_CMAKE_)
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return()
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endif()
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set(DRACO_CMAKE_COMPILER_FLAGS_CMAKE_ 1)
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include(CheckCCompilerFlag)
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include(CheckCXXCompilerFlag)
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include("${draco_root}/cmake/compiler_tests.cmake")
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# Strings used to cache failed C/CXX flags.
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set(DRACO_FAILED_C_FLAGS)
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set(DRACO_FAILED_CXX_FLAGS)
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# Checks C compiler for support of $c_flag. Adds $c_flag to $CMAKE_C_FLAGS when
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# the compile test passes. Caches $c_flag in $DRACO_FAILED_C_FLAGS when the test
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# fails.
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macro(add_c_flag_if_supported c_flag)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
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unset(C_FLAG_FAILED CACHE)
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string(FIND "${DRACO_FAILED_C_FLAGS}" "${c_flag}" C_FLAG_FAILED)
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if(${C_FLAG_FOUND} EQUAL -1 AND ${C_FLAG_FAILED} EQUAL -1)
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unset(C_FLAG_SUPPORTED CACHE)
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message("Checking C compiler flag support for: " ${c_flag})
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check_c_compiler_flag("${c_flag}" C_FLAG_SUPPORTED)
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if(${C_FLAG_SUPPORTED})
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "")
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else()
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set(DRACO_FAILED_C_FLAGS
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"${DRACO_FAILED_C_FLAGS} ${c_flag}"
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CACHE STRING "" FORCE)
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endif()
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endif()
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endmacro()
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# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
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# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
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# $DRACO_FAILED_CXX_FLAGS when the test fails.
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macro(add_cxx_flag_if_supported cxx_flag)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
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unset(CXX_FLAG_FAILED CACHE)
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string(FIND "${DRACO_FAILED_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FAILED)
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if(${CXX_FLAG_FOUND} EQUAL -1 AND ${CXX_FLAG_FAILED} EQUAL -1)
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unset(CXX_FLAG_SUPPORTED CACHE)
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message("Checking CXX compiler flag support for: " ${cxx_flag})
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check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
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if(${CXX_FLAG_SUPPORTED})
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING "")
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else()
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set(DRACO_FAILED_CXX_FLAGS
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"${DRACO_FAILED_CXX_FLAGS} ${cxx_flag}"
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CACHE STRING "" FORCE)
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endif()
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endif()
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endmacro()
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# Convenience method for adding a flag to both the C and C++ compiler command
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# lines.
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macro(add_compiler_flag_if_supported flag)
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add_c_flag_if_supported(${flag})
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add_cxx_flag_if_supported(${flag})
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endmacro()
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# Checks C compiler for support of $c_flag and terminates generation when
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# support is not present.
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macro(require_c_flag c_flag update_c_flags)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
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if(${C_FLAG_FOUND} EQUAL -1)
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unset(HAVE_C_FLAG CACHE)
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message("Checking C compiler flag support for: " ${c_flag})
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check_c_compiler_flag("${c_flag}" HAVE_C_FLAG)
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if(NOT ${HAVE_C_FLAG})
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message(
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FATAL_ERROR "${PROJECT_NAME} requires support for C flag: ${c_flag}.")
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endif()
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if(${update_c_flags})
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set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)
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endif()
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endif()
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endmacro()
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# Checks CXX compiler for support of $cxx_flag and terminates generation when
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# support is not present.
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macro(require_cxx_flag cxx_flag update_cxx_flags)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
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if(${CXX_FLAG_FOUND} EQUAL -1)
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unset(HAVE_CXX_FLAG CACHE)
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message("Checking CXX compiler flag support for: " ${cxx_flag})
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check_cxx_compiler_flag("${cxx_flag}" HAVE_CXX_FLAG)
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if(NOT ${HAVE_CXX_FLAG})
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message(
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FATAL_ERROR
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"${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
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endif()
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if(${update_cxx_flags})
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set(CMAKE_CXX_FLAGS
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"${cxx_flag} ${CMAKE_CXX_FLAGS}"
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CACHE STRING "" FORCE)
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endif()
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endif()
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endmacro()
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# Checks for support of $flag by both the C and CXX compilers. Terminates
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# generation when support is not present in both compilers.
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macro(require_compiler_flag flag update_cmake_flags)
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require_c_flag(${flag} ${update_cmake_flags})
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require_cxx_flag(${flag} ${update_cmake_flags})
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endmacro()
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# Checks only non-MSVC targets for support of $c_flag and terminates generation
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# when support is not present.
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macro(require_c_flag_nomsvc c_flag update_c_flags)
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if(NOT MSVC)
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require_c_flag(${c_flag} ${update_c_flags})
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endif()
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endmacro()
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# Checks only non-MSVC targets for support of $cxx_flag and terminates
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# generation when support is not present.
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macro(require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
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if(NOT MSVC)
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require_cxx_flag(${cxx_flag} ${update_cxx_flags})
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endif()
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endmacro()
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# Checks only non-MSVC targets for support of $flag by both the C and CXX
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# compilers. Terminates generation when support is not present in both
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# compilers.
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macro(require_compiler_flag_nomsvc flag update_cmake_flags)
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require_c_flag_nomsvc(${flag} ${update_cmake_flags})
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require_cxx_flag_nomsvc(${flag} ${update_cmake_flags})
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endmacro()
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# Adds $flag to assembler command line.
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macro(append_as_flag flag)
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unset(AS_FLAG_FOUND CACHE)
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string(FIND "${DRACO_AS_FLAGS}" "${flag}" AS_FLAG_FOUND)
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if(${AS_FLAG_FOUND} EQUAL -1)
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set(DRACO_AS_FLAGS "${DRACO_AS_FLAGS} ${flag}")
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endif()
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endmacro()
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# Adds $flag to the C compiler command line.
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macro(append_c_flag flag)
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unset(C_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_C_FLAGS}" "${flag}" C_FLAG_FOUND)
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if(${C_FLAG_FOUND} EQUAL -1)
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
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endif()
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endmacro()
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# Adds $flag to the CXX compiler command line.
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macro(append_cxx_flag flag)
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unset(CXX_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" CXX_FLAG_FOUND)
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if(${CXX_FLAG_FOUND} EQUAL -1)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
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endif()
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endmacro()
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# Adds $flag to the C and CXX compiler command lines.
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macro(append_compiler_flag flag)
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append_c_flag(${flag})
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append_cxx_flag(${flag})
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endmacro()
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# Adds $flag to the executable linker command line.
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macro(append_exe_linker_flag flag)
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unset(LINKER_FLAG_FOUND CACHE)
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string(FIND "${CMAKE_EXE_LINKER_FLAGS}" "${flag}" LINKER_FLAG_FOUND)
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if(${LINKER_FLAG_FOUND} EQUAL -1)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}")
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endif()
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endmacro()
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# Adds $flag to the link flags for $target.
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function(append_link_flag_to_target target flags)
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unset(target_link_flags)
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get_target_property(target_link_flags ${target} LINK_FLAGS)
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if(target_link_flags)
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unset(link_flag_found)
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string(FIND "${target_link_flags}" "${flags}" link_flag_found)
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if(NOT ${link_flag_found} EQUAL -1)
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return()
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endif()
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set(target_link_flags "${target_link_flags} ${flags}")
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else()
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set(target_link_flags "${flags}")
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endif()
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set_target_properties(${target} PROPERTIES LINK_FLAGS ${target_link_flags})
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endfunction()
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# Adds $flag to executable linker flags, and makes sure C/CXX builds still work.
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macro(require_linker_flag flag)
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append_exe_linker_flag(${flag})
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unset(c_passed)
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draco_check_c_compiles("LINKER_FLAG_C_TEST(${flag})" "" c_passed)
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unset(cxx_passed)
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draco_check_cxx_compiles("LINKER_FLAG_CXX_TEST(${flag})" "" cxx_passed)
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if(NOT c_passed OR NOT cxx_passed)
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message(FATAL_ERROR "Linker flag test for ${flag} failed.")
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endif()
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endmacro()
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