diff options
| author | Alec Thomas <alec@swapoff.org> | 2012-10-18 13:21:06 -0400 |
|---|---|---|
| committer | Alec Thomas <alec@swapoff.org> | 2012-10-18 13:21:06 -0400 |
| commit | 92dc19d8a0eaea4aac6327490695420deb226218 (patch) | |
| tree | 03d16ac15fb4acf9704a347df639de0a76152f2f /CheckCXX11Features.cmake | |
| parent | d6c7bd8997458658dc4853c36c982acd92966875 (diff) | |
Add C++11 feature checking to cmake.
Diffstat (limited to 'CheckCXX11Features.cmake')
| -rw-r--r-- | CheckCXX11Features.cmake | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/CheckCXX11Features.cmake b/CheckCXX11Features.cmake new file mode 100644 index 0000000..fc1243f --- /dev/null +++ b/CheckCXX11Features.cmake @@ -0,0 +1,103 @@ +# Checks for C++11 features
+# CXX11_FEATURE_LIST - a list containing all supported features
+# HAS_CXX11_AUTO - auto keyword
+# HAS_CXX11_NULLPTR - nullptr
+# HAS_CXX11_LAMBDA - lambdas
+# HAS_CXX11_STATIC_ASSERT - static_assert()
+# HAS_CXX11_RVALUE_REFERENCES - rvalue references
+# HAS_CXX11_DECLTYPE - decltype keyword
+# HAS_CXX11_CSTDINT_H - cstdint header
+# HAS_CXX11_LONG_LONG - long long signed & unsigned types
+# HAS_CXX11_VARIADIC_TEMPLATES - variadic templates
+# HAS_CXX11_CONSTEXPR - constexpr keyword
+# HAS_CXX11_SIZEOF_MEMBER - sizeof() non-static members
+# HAS_CXX11_FUNC - __func__ preprocessor constant
+#
+# Original script by Rolf Eike Beer
+# Modifications by Andreas Weis
+#
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.3)
+
+SET(CHECK_CXX11_OLD_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
+IF(CMAKE_COMPILER_IS_GNUCXX)
+ SET(CMAKE_CXX_FLAGS "-std=c++0x")
+endif()
+
+MACRO(CXX11_CHECK_FEATURE FEATURE_NAME FEATURE_NUMBER RESULT_VAR)
+ IF (NOT DEFINED ${RESULT_VAR})
+ SET(_bindir "${CMAKE_CURRENT_BINARY_DIR}/cxx11/cxx11_${FEATURE_NAME}")
+
+ IF (${FEATURE_NUMBER})
+ SET(_SRCFILE_BASE ${CMAKE_CURRENT_LIST_DIR}/c++11-test-${FEATURE_NAME}-N${FEATURE_NUMBER})
+ SET(_LOG_NAME "\"${FEATURE_NAME}\" (N${FEATURE_NUMBER})")
+ ELSE (${FEATURE_NUMBER})
+ SET(_SRCFILE_BASE ${CMAKE_CURRENT_LIST_DIR}/c++11-test-${FEATURE_NAME})
+ SET(_LOG_NAME "\"${FEATURE_NAME}\"")
+ ENDIF (${FEATURE_NUMBER})
+ MESSAGE(STATUS "Checking C++11 support for ${_LOG_NAME}")
+
+ SET(_SRCFILE "${_SRCFILE_BASE}.cpp")
+ SET(_SRCFILE_FAIL "${_SRCFILE_BASE}_fail.cpp")
+ SET(_SRCFILE_FAIL_COMPILE "${_SRCFILE_BASE}_fail_compile.cpp")
+
+ IF (CROSS_COMPILING)
+ try_compile(${RESULT_VAR} "${_bindir}" "${_SRCFILE}")
+ IF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
+ try_compile(${RESULT_VAR} "${_bindir}_fail" "${_SRCFILE_FAIL}")
+ ENDIF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
+ ELSE (CROSS_COMPILING)
+ try_run(_RUN_RESULT_VAR _COMPILE_RESULT_VAR
+ "${_bindir}" "${_SRCFILE}")
+ IF (_COMPILE_RESULT_VAR AND NOT _RUN_RESULT_VAR)
+ SET(${RESULT_VAR} TRUE)
+ ELSE (_COMPILE_RESULT_VAR AND NOT _RUN_RESULT_VAR)
+ SET(${RESULT_VAR} FALSE)
+ ENDIF (_COMPILE_RESULT_VAR AND NOT _RUN_RESULT_VAR)
+ IF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
+ try_run(_RUN_RESULT_VAR _COMPILE_RESULT_VAR
+ "${_bindir}_fail" "${_SRCFILE_FAIL}")
+ IF (_COMPILE_RESULT_VAR AND _RUN_RESULT_VAR)
+ SET(${RESULT_VAR} TRUE)
+ ELSE (_COMPILE_RESULT_VAR AND _RUN_RESULT_VAR)
+ SET(${RESULT_VAR} FALSE)
+ ENDIF (_COMPILE_RESULT_VAR AND _RUN_RESULT_VAR)
+ ENDIF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL})
+ ENDIF (CROSS_COMPILING)
+ IF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL_COMPILE})
+ try_compile(_TMP_RESULT "${_bindir}_fail_compile" "${_SRCFILE_FAIL_COMPILE}")
+ IF (_TMP_RESULT)
+ SET(${RESULT_VAR} FALSE)
+ ELSE (_TMP_RESULT)
+ SET(${RESULT_VAR} TRUE)
+ ENDIF (_TMP_RESULT)
+ ENDIF (${RESULT_VAR} AND EXISTS ${_SRCFILE_FAIL_COMPILE})
+
+ IF (${RESULT_VAR})
+ MESSAGE(STATUS "Checking C++11 support for ${_LOG_NAME} -- works")
+ LIST(APPEND CXX11_FEATURE_LIST ${RESULT_VAR})
+ ELSE (${RESULT_VAR})
+ MESSAGE(STATUS "Checking C++11 support for ${_LOG_NAME} -- not supported")
+ ENDIF (${RESULT_VAR})
+ SET(${RESULT_VAR} ${${RESULT_VAR}} CACHE INTERNAL "C++11 support for ${_LOG_NAME}")
+ ENDIF (NOT DEFINED ${RESULT_VAR})
+ENDMACRO(CXX11_CHECK_FEATURE)
+
+CXX11_CHECK_FEATURE("auto" 2546 HAS_CXX11_AUTO)
+CXX11_CHECK_FEATURE("nullptr" 2431 HAS_CXX11_NULLPTR)
+CXX11_CHECK_FEATURE("lambda" 2927 HAS_CXX11_LAMBDA)
+CXX11_CHECK_FEATURE("static_assert" 1720 HAS_CXX11_STATIC_ASSERT)
+CXX11_CHECK_FEATURE("rvalue_references" 2118 HAS_CXX11_RVALUE_REFERENCES)
+CXX11_CHECK_FEATURE("decltype" 2343 HAS_CXX11_DECLTYPE)
+CXX11_CHECK_FEATURE("cstdint" "" HAS_CXX11_CSTDINT_H)
+CXX11_CHECK_FEATURE("long_long" 1811 HAS_CXX11_LONG_LONG)
+CXX11_CHECK_FEATURE("variadic_templates" 2555 HAS_CXX11_VARIADIC_TEMPLATES)
+CXX11_CHECK_FEATURE("constexpr" 2235 HAS_CXX11_CONSTEXPR)
+CXX11_CHECK_FEATURE("sizeof_member" 2253 HAS_CXX11_SIZEOF_MEMBER)
+CXX11_CHECK_FEATURE("__func__" 2340 HAS_CXX11_FUNC)
+
+SET(CXX11_FEATURE_LIST ${CXX11_FEATURE_LIST} CACHE STRING "C++11 feature support list")
+MARK_AS_ADVANCED(FORCE CXX11_FEATURE_LIST)
+
+SET(CMAKE_CXX_FLAGS ${CHECK_CXX11_OLD_CMAKE_CXX_FLAGS})
+UNSET(CHECK_CXX11_OLD_CMAKE_CXX_FLAGS)
+
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