diff options
Diffstat (limited to 'Modules/Compiler/GNU.cmake')
| -rw-r--r-- | Modules/Compiler/GNU.cmake | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake index 5930e377cb..f14020876f 100644 --- a/Modules/Compiler/GNU.cmake +++ b/Modules/Compiler/GNU.cmake @@ -52,6 +52,44 @@ macro(__compiler_gnu lang) set(CMAKE_DEPFILE_FLAGS_${lang} "-MD -MT <DEP_TARGET> -MF <DEP_FILE>") endif() + # define flags for linker depfile generation + if (NOT DEFINED CMAKE_${lang}_LINKER_DEPFILE_SUPPORTED) + ## Ensure ninja tool is recent enough... + if(CMAKE_GENERATOR MATCHES "^Ninja") + # Ninja 1.10 or upper is required + execute_process(COMMAND "${CMAKE_MAKE_PROGRAM}" --version + OUTPUT_VARIABLE _ninja_version + ERROR_VARIABLE _ninja_version) + if (_ninja_version MATCHES "[0-9]+(\\.[0-9]+)*") + set (_ninja_version "${CMAKE_MATCH_0}") + endif() + if (_ninja_version VERSION_LESS "1.10") + set(CMAKE_${lang}_LINKER_DEPFILE_SUPPORTED FALSE) + endif() + unset(_ninja_version) + endif() + + if (NOT DEFINED CMAKE_${lang}_LINKER_DEPFILE_SUPPORTED) + ## check if this feature is supported by the linker + execute_process(COMMAND "${CMAKE_LINKER}" --help + OUTPUT_VARIABLE _linker_capabilities + ERROR_VARIABLE _linker_capabilities) + if(_linker_capabilities MATCHES "--dependency-file") + set(CMAKE_${lang}_LINKER_DEPFILE_SUPPORTED TRUE) + else() + set(CMAKE_${lang}_LINKER_DEPFILE_SUPPORTED FALSE) + endif() + unset(_linker_capabilities) + endif() + endif() + if (CMAKE_${lang}_LINKER_DEPFILE_SUPPORTED) + set(CMAKE_${lang}_LINKER_DEPFILE_FLAGS "LINKER:--dependency-file,<DEP_FILE>") + set(CMAKE_${lang}_LINKER_DEPFILE_FORMAT gcc) + set(CMAKE_${lang}_LINK_DEPENDS_USE_LINKER TRUE) + else() + unset(CMAKE_${lang}_LINK_DEPENDS_USE_LINKER) + endif() + # Initial configuration flags. string(APPEND CMAKE_${lang}_FLAGS_INIT " ") string(APPEND CMAKE_${lang}_FLAGS_DEBUG_INIT " -g") |