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