diff options
Diffstat (limited to 'share/cmake-3.16/Modules/Compiler/GNU.cmake')
| -rw-r--r-- | share/cmake-3.16/Modules/Compiler/GNU.cmake | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/share/cmake-3.16/Modules/Compiler/GNU.cmake b/share/cmake-3.16/Modules/Compiler/GNU.cmake new file mode 100644 index 0000000..1c050a2 --- /dev/null +++ b/share/cmake-3.16/Modules/Compiler/GNU.cmake @@ -0,0 +1,119 @@ +# 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) + +include(Compiler/CMakeCommonCompilerMacros) +include(Internal/CMakeCheckCompilerFlag) + +set(__pch_header_C "c-header") +set(__pch_header_CXX "c++-header") +set(__pch_header_OBJC "objective-c-header") +set(__pch_header_OBJCXX "objective-c++-header") + +macro(__compiler_gnu lang) + # Feature flags. + set(CMAKE_${lang}_VERBOSE_FLAG "-v") + set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-fPIC") + set (_CMAKE_${lang}_PIE_MAY_BE_SUPPORTED_BY_LINKER NO) + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4) + set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE") + # Support of PIE at link stage depends on various elements : platform, compiler, linker + # so to activate it, module CheckPIESupported must be used. + set (_CMAKE_${lang}_PIE_MAY_BE_SUPPORTED_BY_LINKER YES) + set(CMAKE_${lang}_LINK_OPTIONS_PIE ${CMAKE_${lang}_COMPILE_OPTIONS_PIE} "-pie") + set(CMAKE_${lang}_LINK_OPTIONS_NO_PIE "-no-pie") + endif() + if(NOT CMAKE_${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=") + + set(CMAKE_${lang}_LINKER_WRAPPER_FLAG "-Wl,") + set(CMAKE_${lang}_LINKER_WRAPPER_FLAG_SEP ",") + + # 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() + + set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES) + set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO) + + # '-flto' introduced since GCC 4.5: + # * https://gcc.gnu.org/onlinedocs/gcc-4.4.7/gcc/Option-Summary.html (no) + # * https://gcc.gnu.org/onlinedocs/gcc-4.5.4/gcc/Option-Summary.html (yes) + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.5) + set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES) + set(__lto_flags -flto) + + if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.7) + # '-ffat-lto-objects' introduced since GCC 4.7: + # * https://gcc.gnu.org/onlinedocs/gcc-4.6.4/gcc/Option-Summary.html (no) + # * https://gcc.gnu.org/onlinedocs/gcc-4.7.4/gcc/Option-Summary.html (yes) + list(APPEND __lto_flags -fno-fat-lto-objects) + endif() + + set(CMAKE_${lang}_COMPILE_OPTIONS_IPO ${__lto_flags}) + + # Need to use version of 'ar'/'ranlib' with plugin support. + # Quote from [documentation][1]: + # + # To create static libraries suitable for LTO, + # use gcc-ar and gcc-ranlib instead of ar and ranlib + # + # [1]: https://gcc.gnu.org/onlinedocs/gcc-4.9.4/gcc/Optimize-Options.html + set(CMAKE_${lang}_ARCHIVE_CREATE_IPO + "\"${CMAKE_${lang}_COMPILER_AR}\" cr <TARGET> <LINK_FLAGS> <OBJECTS>" + ) + + set(CMAKE_${lang}_ARCHIVE_APPEND_IPO + "\"${CMAKE_${lang}_COMPILER_AR}\" r <TARGET> <LINK_FLAGS> <OBJECTS>" + ) + + set(CMAKE_${lang}_ARCHIVE_FINISH_IPO + "\"${CMAKE_${lang}_COMPILER_RANLIB}\" <TARGET>" + ) + endif() + + set(CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "${CMAKE_${lang}_COMPILER}") + if(CMAKE_${lang}_COMPILER_ARG1) + separate_arguments(_COMPILER_ARGS NATIVE_COMMAND "${CMAKE_${lang}_COMPILER_ARG1}") + list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND ${_COMPILER_ARGS}) + unset(_COMPILER_ARGS) + endif() + list(APPEND CMAKE_${lang}_COMPILER_PREDEFINES_COMMAND "-dM" "-E" "-c" "${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp") + + set(CMAKE_PCH_EXTENSION .gch) + if (NOT CMAKE_GENERATOR MATCHES "Xcode") + set(CMAKE_PCH_PROLOGUE "#pragma GCC system_header") + endif() + set(CMAKE_${lang}_COMPILE_OPTIONS_USE_PCH -Winvalid-pch -include <PCH_HEADER>) + set(CMAKE_${lang}_COMPILE_OPTIONS_CREATE_PCH -Winvalid-pch -x ${__pch_header_${lang}} -include <PCH_HEADER>) +endmacro() |