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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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