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-rw-r--r--cmakemodules/SetupCompiler.cmake72
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) \ No newline at end of file