2014-07-31 22:20:20 +08:00
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# - Compile and run code to check for C++ features
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#
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# This functions compiles a source file under the `cmake` folder
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# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
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# environment
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#
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2014-08-22 21:36:19 +08:00
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# cxx_feature_check(<FLAG> [<VARIANT>])
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2014-07-31 22:20:20 +08:00
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#
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# - Example
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#
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2014-08-22 21:36:19 +08:00
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# include(CXXFeatureCheck)
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# cxx_feature_check(STD_REGEX)
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2014-07-31 22:20:20 +08:00
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# Requires CMake 2.6+
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2014-08-22 21:36:19 +08:00
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if(__cxx_feature_check)
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2014-07-31 22:20:20 +08:00
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return()
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endif()
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2014-08-22 21:36:19 +08:00
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set(__cxx_feature_check INCLUDED)
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2014-07-31 22:20:20 +08:00
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function(cxx_feature_check FILE)
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string(TOLOWER ${FILE} FILE)
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string(TOUPPER ${FILE} VAR)
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string(TOUPPER "HAVE_${VAR}" FEATURE)
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message("-- Performing Test ${FEATURE}")
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try_run(RUN_${FEATURE} COMPILE_${FEATURE} ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp)
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if(RUN_${FEATURE} EQUAL 0)
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message("-- Performing Test ${FEATURE} -- Success")
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set(HAVE_${VAR} 1 PARENT_SCOPE)
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add_definitions(-DHAVE_${VAR})
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else()
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message("-- Performing Test ${FEATURE} -- Failed")
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endif()
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endfunction()
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