45 lines
1.1 KiB
CMake
45 lines
1.1 KiB
CMake
#.rst:
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#
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# Adds C++ support.
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# Appends EXTRA_CXXFLAGS to CMAKE_CXX_FLAGS.
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# If environment variable CXXFLAGS is set, then the CXXFLAGS are used
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# and no other flags are used or appended.
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#
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# Variables used::
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#
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# EXTRA_CXXFLAGS
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#
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# Variables modified::
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#
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# CMAKE_CXX_FLAGS
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#
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# Environment variables used::
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#
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# CXXFLAGS
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#
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# autocmake.cfg configuration::
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#
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# docopt: --cxx=<CXX> C++ compiler [default: g++].
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# --extra-cxx-flags=<EXTRA_CXXFLAGS> Extra C++ compiler flags [default: ''].
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# export: 'CXX={0}'.format(arguments['--cxx'])
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# define: '-DEXTRA_CXXFLAGS="{0}"'.format(arguments['--extra-cxx-flags'])
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enable_language(CXX)
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if(NOT DEFINED CMAKE_C_COMPILER_ID)
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message(FATAL_ERROR "CMAKE_C_COMPILER_ID variable is not defined!")
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endif()
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if(NOT CMAKE_C_COMPILER_WORKS)
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message(FATAL_ERROR "CMAKE_C_COMPILER_WORKS is false!")
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endif()
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if(DEFINED EXTRA_CXXFLAGS)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EXTRA_CXXFLAGS}")
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endif()
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if(DEFINED ENV{CXXFLAGS})
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message(STATUS "CXXFLAGS is set to '$ENV{CXXFLAGS}'.")
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set(CMAKE_CXX_FLAGS "$ENV{CXXFLAGS}")
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endif()
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