diff options
Diffstat (limited to 'cmakemodules/SetupCompiler.cmake')
| -rw-r--r-- | cmakemodules/SetupCompiler.cmake | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/cmakemodules/SetupCompiler.cmake b/cmakemodules/SetupCompiler.cmake new file mode 100644 index 0000000..4e1c003 --- /dev/null +++ b/cmakemodules/SetupCompiler.cmake @@ -0,0 +1,72 @@ +INCLUDE(TestCXXAcceptsFlag) +INCLUDE(MacroEnsureVersion) + +CHECK_CXX_ACCEPTS_FLAG("-fexceptions" CXX_EXCEPTION) +IF (CXX_EXCEPTION) + SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions") +ENDIF (CXX_EXCEPTION) + +IF (CMAKE_COMPILER_IS_GNUCXX) + +CHECK_CXX_ACCEPTS_FLAG("-fstack-protector" CXX_PROTECTOR) +IF (CXX_PROTECTOR) + SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector") +ENDIF (CXX_PROTECTOR) + +# some code from KDE4 trunk cmake - all stuff under LGPL I think +# check for visibility patch in libstdc++ below written by me +CHECK_CXX_ACCEPTS_FLAG("-fvisibility=hidden" HAVE_GCC_VISIBILITY) + +# get the gcc version +exec_program(${CMAKE_C_COMPILER} ARGS --version OUTPUT_VARIABLE _gcc_version_info) +string (REGEX MATCH " [34]\\.[0-9]\\.[0-9]" _gcc_version "${_gcc_version_info}") +# gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the patch level, handle this here: +if (NOT _gcc_version) + string (REGEX REPLACE ".*\\(GCC\\).* ([34]\\.[0-9]) .*" "\\1.0" _gcc_version "${_gcc_version_info}") +endif (NOT _gcc_version) + +macro_ensure_version("4.1.0" "${_gcc_version}" GCC_IS_NEWER_THAN_4_1) + +if (GCC_IS_NEWER_THAN_4_1) + exec_program(${CMAKE_C_COMPILER} ARGS -v OUTPUT_VARIABLE _gcc_alloc_info) + string(REGEX MATCH "(--enable-libstdcxx-allocator=mt)" _GCC_COMPILED_WITH_BAD_ALLOCATOR "${_gcc_alloc_info}") + IF (_GCC_COMPILED_WITH_BAD_ALLOCATOR) + SET(HAVE_GCC_VISIBILITY FALSE) + ENDIF (_GCC_COMPILED_WITH_BAD_ALLOCATOR) +else (GCC_IS_NEWER_THAN_4_1) + set(_GCC_COMPILED_WITH_BAD_ALLOCATOR FALSE) + CHECK_CXX_ACCEPTS_FLAG("-E" HAVE_PREPROCESSOR_FLAG) + IF (HAVE_PREPROCESSOR_FLAG) + FILE(WRITE ${CMAKE_BINARY_DIR}/dummy.cpp "#include <exception>\n") + EXECUTE_PROCESS(COMMAND ${CMAKE_CXX_COMPILER} -E ${CMAKE_BINARY_DIR}/dummy.cpp OUTPUT_VARIABLE _gcc_hidden_push_out RESULT_VARIABLE _gcc_hidden_push_err ERROR_QUIET) + FILE(REMOVE ${CMAKE_BINARY_DIR}/dummy.cpp) + IF (NOT ${_gcc_hidden_push_err}) + STRING(REGEX MATCH "GCC visibility push" _gcc_has_hidden_push ${_gcc_hidden_push_out}) + ENDIF (NOT ${_gcc_hidden_push_err}) + IF(_gcc_has_hidden_push) + MESSAGE(STATUS "libstdc++ is patched for visibility support.") + ELSE(_gcc_has_hidden_push) + MESSAGE(STATUS "libstdc++ isn't patched for visibility support. Disabling -fvisibility=hidden") + SET(HAVE_GCC_VISIBILITY FALSE) + ENDIF(_gcc_has_hidden_push) + ELSE (HAVE_PREPROCESSOR_FLAG) + # should never happen but who knows + SET(HAVE_GCC_VISIBILITY FALSE) + ENDIF (HAVE_PREPROCESSOR_FLAG) +endif (GCC_IS_NEWER_THAN_4_1) + +message(STATUS "have_visibility: ${HAVE_GCC_VISIBILITY} version>=4.1: ${GCC_IS_NEWER_THAN_4_1} bad alloctor: ${_GCC_COMPILED_WITH_BAD_ALLOCATOR}") +ENDIF (CMAKE_COMPILER_IS_GNUCXX) + +# check if we can use setenv +TRY_COMPILE(HAS_SETENV + ${CMAKE_BINARY_DIR} + ${CMAKE_SOURCE_DIR}/cmakemodules/TestSetenv.cxx + OUTPUT_VARIABLE OUTPUT +) + +IF (HAS_SETENV) + MESSAGE(STATUS "Checking for setenv - yes") +ELSE (HAS_SETENV) + MESSAGE(STATUS "Checking for setenv - no") +ENDIF (HAS_SETENV)
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