104 lines
4.4 KiB
CMake
104 lines
4.4 KiB
CMake
# Checks for C++11 features
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# CXX11_FEATURE_LIST - a list containing all supported features
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# HAS_CXX11_AUTO - auto keyword
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# HAS_CXX11_NULLPTR - nullptr
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# HAS_CXX11_LAMBDA - lambdas
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# HAS_CXX11_STATIC_ASSERT - static_assert()
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# HAS_CXX11_RVALUE_REFERENCES - rvalue references
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# HAS_CXX11_DECLTYPE - decltype keyword
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# HAS_CXX11_CSTDINT_H - cstdint header
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# HAS_CXX11_LONG_LONG - long long signed & unsigned types
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# HAS_CXX11_VARIADIC_TEMPLATES - variadic templates
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# HAS_CXX11_CONSTEXPR - constexpr keyword
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# HAS_CXX11_SIZEOF_MEMBER - sizeof() non-static members
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# HAS_CXX11_FUNC - __func__ preprocessor constant
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#
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# Original script by Rolf Eike Beer
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# Modifications by Andreas Weis
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#
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CMAKE_MINIMUM_REQUIRED(VERSION 2.8.3)
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SET(CHECK_CXX11_OLD_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
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IF(CMAKE_COMPILER_IS_GNUCXX)
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SET(CMAKE_CXX_FLAGS "-std=c++0x")
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endif()
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MACRO(CXX11_CHECK_FEATURE FEATURE_NAME FEATURE_NUMBER RESULT_VAR)
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IF (NOT DEFINED ${RESULT_VAR})
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SET(_bindir "${CMAKE_CURRENT_BINARY_DIR}/cxx11/cxx11_${FEATURE_NAME}")
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IF (${FEATURE_NUMBER})
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SET(_SRCFILE_BASE ${CMAKE_CURRENT_LIST_DIR}/c++11-test-${FEATURE_NAME}-N${FEATURE_NUMBER})
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SET(_LOG_NAME "\"${FEATURE_NAME}\" (N${FEATURE_NUMBER})")
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ELSE (${FEATURE_NUMBER})
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SET(_SRCFILE_BASE ${CMAKE_CURRENT_LIST_DIR}/c++11-test-${FEATURE_NAME})
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SET(_LOG_NAME "\"${FEATURE_NAME}\"")
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ENDIF (${FEATURE_NUMBER})
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MESSAGE(STATUS "Checking C++11 support for ${_LOG_NAME}")
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SET(_SRCFILE "${_SRCFILE_BASE}.cpp")
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SET(_SRCFILE_FAIL "${_SRCFILE_BASE}_fail.cpp")
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SET(_SRCFILE_FAIL_COMPILE "${_SRCFILE_BASE}_fail_compile.cpp")
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IF (CROSS_COMPILING)
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try_compile(${RESULT_VAR} "${_bindir}" "${_SRCFILE}")
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IF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
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try_compile(${RESULT_VAR} "${_bindir}_fail" "${_SRCFILE_FAIL}")
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ENDIF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
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ELSE (CROSS_COMPILING)
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try_run(_RUN_RESULT_VAR _COMPILE_RESULT_VAR
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"${_bindir}" "${_SRCFILE}")
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IF (_COMPILE_RESULT_VAR AND NOT _RUN_RESULT_VAR)
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SET(${RESULT_VAR} TRUE)
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ELSE (_COMPILE_RESULT_VAR AND NOT _RUN_RESULT_VAR)
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SET(${RESULT_VAR} FALSE)
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ENDIF (_COMPILE_RESULT_VAR AND NOT _RUN_RESULT_VAR)
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IF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
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try_run(_RUN_RESULT_VAR _COMPILE_RESULT_VAR
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"${_bindir}_fail" "${_SRCFILE_FAIL}")
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IF (_COMPILE_RESULT_VAR AND _RUN_RESULT_VAR)
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SET(${RESULT_VAR} TRUE)
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ELSE (_COMPILE_RESULT_VAR AND _RUN_RESULT_VAR)
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SET(${RESULT_VAR} FALSE)
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ENDIF (_COMPILE_RESULT_VAR AND _RUN_RESULT_VAR)
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ENDIF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
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ENDIF (CROSS_COMPILING)
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IF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL_COMPILE})
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try_compile(_TMP_RESULT "${_bindir}_fail_compile" "${_SRCFILE_FAIL_COMPILE}")
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IF (_TMP_RESULT)
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SET(${RESULT_VAR} FALSE)
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ELSE (_TMP_RESULT)
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SET(${RESULT_VAR} TRUE)
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ENDIF (_TMP_RESULT)
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ENDIF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL_COMPILE})
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IF (${RESULT_VAR})
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MESSAGE(STATUS "Checking C++11 support for ${_LOG_NAME} -- works")
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LIST(APPEND CXX11_FEATURE_LIST ${RESULT_VAR})
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ELSE (${RESULT_VAR})
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MESSAGE(STATUS "Checking C++11 support for ${_LOG_NAME} -- not supported")
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ENDIF (${RESULT_VAR})
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SET(${RESULT_VAR} ${${RESULT_VAR}} CACHE INTERNAL "C++11 support for ${_LOG_NAME}")
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ENDIF (NOT DEFINED ${RESULT_VAR})
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ENDMACRO(CXX11_CHECK_FEATURE)
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CXX11_CHECK_FEATURE("auto" 2546 HAS_CXX11_AUTO)
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CXX11_CHECK_FEATURE("nullptr" 2431 HAS_CXX11_NULLPTR)
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CXX11_CHECK_FEATURE("lambda" 2927 HAS_CXX11_LAMBDA)
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CXX11_CHECK_FEATURE("static_assert" 1720 HAS_CXX11_STATIC_ASSERT)
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CXX11_CHECK_FEATURE("rvalue_references" 2118 HAS_CXX11_RVALUE_REFERENCES)
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CXX11_CHECK_FEATURE("decltype" 2343 HAS_CXX11_DECLTYPE)
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CXX11_CHECK_FEATURE("cstdint" "" HAS_CXX11_CSTDINT_H)
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CXX11_CHECK_FEATURE("long_long" 1811 HAS_CXX11_LONG_LONG)
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CXX11_CHECK_FEATURE("variadic_templates" 2555 HAS_CXX11_VARIADIC_TEMPLATES)
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CXX11_CHECK_FEATURE("constexpr" 2235 HAS_CXX11_CONSTEXPR)
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CXX11_CHECK_FEATURE("sizeof_member" 2253 HAS_CXX11_SIZEOF_MEMBER)
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CXX11_CHECK_FEATURE("__func__" 2340 HAS_CXX11_FUNC)
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SET(CXX11_FEATURE_LIST ${CXX11_FEATURE_LIST} CACHE STRING "C++11 feature support list")
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MARK_AS_ADVANCED(FORCE CXX11_FEATURE_LIST)
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SET(CMAKE_CXX_FLAGS ${CHECK_CXX11_OLD_CMAKE_CXX_FLAGS})
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UNSET(CHECK_CXX11_OLD_CMAKE_CXX_FLAGS)
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