63 lines
2.3 KiB
CMake
63 lines
2.3 KiB
CMake
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# This test will verify if CheckCXXSymbolExists only report symbols available
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# for linking that really are. You can find some documentation on this in
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# bug 11333 where we found out that gcc would optimize out the actual
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# reference to the symbol, so symbols that are in fact _not_ available in the
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# given libraries (but seen in header) were reported as present.
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#
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# If you change this test do not forget to change the CheckSymbolExists
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# test, too.
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PROJECT(CheckCXXSymbolExists CXX)
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CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR)
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SET(CMAKE_REQUIRED_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/../CheckSymbolExists")
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INCLUDE(CheckCXXSymbolExists)
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foreach(_config_type Release RelWithDebInfo MinSizeRel Debug)
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set(CMAKE_TRY_COMPILE_CONFIGURATION ${_config_type})
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unset(CSE_RESULT_${_config_type} CACHE)
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MESSAGE(STATUS "Testing configuration ${_config_type}")
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check_cxx_symbol_exists(non_existent_function_for_symbol_test "cm_cse.h" CSE_RESULT_${_config_type})
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IF (CSE_RESULT_${_config_type})
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MESSAGE(SEND_ERROR "CheckCXXSymbolExists reported a nonexistent symbol as existing in configuration ${_config_type}")
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ENDIF (CSE_RESULT_${_config_type})
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endforeach()
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set(CMAKE_TRY_COMPILE_CONFIGURATION ${CMAKE_BUILD_TYPE})
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unset(CSE_RESULT_ERRNO_CERRNO CACHE)
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MESSAGE(STATUS "Checking <cerrno>")
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check_cxx_symbol_exists(errno "cerrno" CSE_RESULT_ERRNO_CERRNO)
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IF (NOT CSE_RESULT_ERRNO_CERRNO)
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unset(CSE_RESULT_ERRNO_ERRNOH CACHE)
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MESSAGE(STATUS "Checking <errno.h>")
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check_cxx_symbol_exists(errno "errno.h" CSE_RESULT_ERRNO_ERRNOH)
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IF (NOT CSE_RESULT_ERRNO_ERRNOH)
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MESSAGE(SEND_ERROR "CheckCXXSymbolExists did not find errno in <cerrno> and <errno.h>")
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ELSE (NOT CSE_RESULT_ERRNO_ERRNOH)
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MESSAGE(STATUS "errno found in <errno.h>")
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ENDIF (NOT CSE_RESULT_ERRNO_ERRNOH)
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ELSE (NOT CSE_RESULT_ERRNO_CERRNO)
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MESSAGE(STATUS "errno found in <cerrno>")
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ENDIF (NOT CSE_RESULT_ERRNO_CERRNO)
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IF (CMAKE_COMPILER_IS_GNUCXX)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
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unset(CSE_RESULT_O3 CACHE)
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MESSAGE(STATUS "Testing with optimization -O3")
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check_cxx_symbol_exists(non_existent_function_for_symbol_test "cm_cse.h" CSE_RESULT_O3)
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IF (CSE_RESULT_O3)
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MESSAGE(SEND_ERROR "CheckCXXSymbolExists reported a nonexistent symbol as existing with optimization -O3")
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ENDIF (CSE_RESULT_O3)
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ENDIF (CMAKE_COMPILER_IS_GNUCXX)
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