| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| |
| # This module is shared by multiple languages; use include blocker. |
| if(__COMPILER_GNU) |
| return() |
| endif() |
| set(__COMPILER_GNU 1) |
| |
| macro(__compiler_gnu lang) |
| # Feature flags. |
| set(CMAKE_${lang}_VERBOSE_FLAG "-v") |
| set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-fPIC") |
| if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4) |
| set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE") |
| endif() |
| if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.0) |
| set(CMAKE_${lang}_COMPILE_OPTIONS_VISIBILITY "-fvisibility=") |
| endif() |
| set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "-fPIC") |
| set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-shared") |
| set(CMAKE_${lang}_COMPILE_OPTIONS_SYSROOT "--sysroot=") |
| |
| # Older versions of gcc (< 4.5) contain a bug causing them to report a missing |
| # header file as a warning if depfiles are enabled, causing check_header_file |
| # tests to always succeed. Work around this by disabling dependency tracking |
| # in try_compile mode. |
| get_property(_IN_TC GLOBAL PROPERTY IN_TRY_COMPILE) |
| if(NOT _IN_TC OR CMAKE_FORCE_DEPFILES) |
| # distcc does not transform -o to -MT when invoking the preprocessor |
| # internally, as it ought to. Work around this bug by setting -MT here |
| # even though it isn't strictly necessary. |
| set(CMAKE_DEPFILE_FLAGS_${lang} "-MD -MT <OBJECT> -MF <DEPFILE>") |
| endif() |
| |
| # Initial configuration flags. |
| string(APPEND CMAKE_${lang}_FLAGS_INIT " ") |
| string(APPEND CMAKE_${lang}_FLAGS_DEBUG_INIT " -g") |
| string(APPEND CMAKE_${lang}_FLAGS_MINSIZEREL_INIT " -Os -DNDEBUG") |
| string(APPEND CMAKE_${lang}_FLAGS_RELEASE_INIT " -O3 -DNDEBUG") |
| string(APPEND CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT " -O2 -g -DNDEBUG") |
| set(CMAKE_${lang}_CREATE_PREPROCESSED_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>") |
| set(CMAKE_${lang}_CREATE_ASSEMBLY_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>") |
| if(NOT APPLE OR NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4) # work around #4462 |
| set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ") |
| endif() |
| endmacro() |