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cmake/modules/AddCompilerFlags.cmake
| Show First 20 Lines • Show All 94 Lines • ▼ Show 20 Lines | foreach(f ${ARGN}) | ||||
| # Some linkers (e.g.: Clang) will issue a -Wunused-command-line-argument | # Some linkers (e.g.: Clang) will issue a -Wunused-command-line-argument | ||||
| # warning when an unknown linker flag is set. | # warning when an unknown linker flag is set. | ||||
| # Using -Werror will promote these warnings to errors so | # Using -Werror will promote these warnings to errors so | ||||
| # CHECK_CXX_COMPILER_FLAG() will return false, preventing the flag from | # CHECK_CXX_COMPILER_FLAG() will return false, preventing the flag from | ||||
| # being set. | # being set. | ||||
| add_compiler_flags_to_var( | add_compiler_flags_to_var( | ||||
| CMAKE_REQUIRED_FLAGS | CMAKE_REQUIRED_FLAGS | ||||
| CXX | CXX | ||||
| "-Wunused-command-line-argument" | "-Werror=unused-command-line-argument" | ||||
| ) | ) | ||||
| # Save the current linker flags | # Save the current linker flags | ||||
| set(SAVE_CMAKE_EXE_LINKERFLAGS ${CMAKE_EXE_LINKER_FLAGS}) | set(SAVE_CMAKE_EXE_LINKERFLAGS ${CMAKE_EXE_LINKER_FLAGS}) | ||||
| string(APPEND CMAKE_EXE_LINKER_FLAGS " ${f}") | string(APPEND CMAKE_EXE_LINKER_FLAGS " ${f}") | ||||
| # CHECK_CXX_COMPILER_FLAG calls CHECK_CXX_SOURCE_COMPILES which in turn | # CHECK_CXX_COMPILER_FLAG calls CHECK_CXX_SOURCE_COMPILES which in turn | ||||
| # calls try_compile, so it will check our flag | # calls try_compile, so it will check our flag | ||||
| CHECK_CXX_COMPILER_FLAG("" ${FLAG_IS_SUPPORTED}) | CHECK_CXX_COMPILER_FLAG("" ${FLAG_IS_SUPPORTED}) | ||||
| # Unset the -Werror=unused-command-line-argument flag if it is set. | # Unset the -Werror=unused-command-line-argument flag if it is set. | ||||
| remove_compiler_flags_from_var( | remove_compiler_flags_from_var( | ||||
| CMAKE_REQUIRED_FLAGS | CMAKE_REQUIRED_FLAGS | ||||
| "-Wunused-command-line-argument" | "-Werror=unused-command-line-argument" | ||||
| ) | ) | ||||
| # If the flag is not supported restore CMAKE_EXE_LINKER_FLAGS | # If the flag is not supported restore CMAKE_EXE_LINKER_FLAGS | ||||
| if(NOT ${FLAG_IS_SUPPORTED}) | if(NOT ${FLAG_IS_SUPPORTED}) | ||||
| set(CMAKE_EXE_LINKER_FLAGS ${SAVE_CMAKE_EXE_LINKERFLAGS}) | set(CMAKE_EXE_LINKER_FLAGS ${SAVE_CMAKE_EXE_LINKERFLAGS}) | ||||
| endif() | endif() | ||||
| endforeach() | endforeach() | ||||
| set(CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS} PARENT_SCOPE) | set(CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS} PARENT_SCOPE) | ||||
| endfunction() | endfunction() | ||||