FreeCAD

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# Locate PyCXX headers and source files
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# This module defines
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# PYCXX_INCLUDE_DIR
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# PYCXX_SOURCE_DIR
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# PYCXX_FOUND
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# PYCXX_SOURCES
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# PYCXX_VERSION
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#
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# The PYCXX_*_DIR variables can be set to tell this module where
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# the files are.
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# There's no standard location for PyCXX.
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#
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# The authors' example is to put it in "~\" [sic].
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#
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# Ubuntu puts the includes into /usr/include/python2.7/CXX and sources into
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# /usr/share/python2.7/CXX.
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#
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# The Zultron Fedora RPM does the same as Ubuntu.
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set(PYCXX_FOUND "YES")
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# find the header directory
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if(PYCXX_INCLUDE_DIR)
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    # headers better be in there
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    if(NOT EXISTS "${PYCXX_INCLUDE_DIR}/CXX/Config.hxx")
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        if(PyCXX_FIND_REQUIRED)
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            MESSAGE(FATAL_ERROR
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                "PyCXX: could not find CXX/Config.hxx in PYCXX_INCLUDE_DIR "
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            "${PYCXX_INCLUDE_DIR}")
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        else(PyCXX_FIND_REQUIRED)
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            MESSAGE(WARNING
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                "PyCXX: could not find CXX/Config.hxx in PYCXX_INCLUDE_DIR "
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            "${PYCXX_INCLUDE_DIR}")
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            unset(PYCXX_FOUND)
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        endif(PyCXX_FIND_REQUIRED)
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    endif(NOT EXISTS "${PYCXX_INCLUDE_DIR}/CXX/Config.hxx")
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else(PYCXX_INCLUDE_DIR)
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    # check in 'standard' places
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    find_path(PYCXX_INCLUDE_DIR CXX/Config.hxx
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        ${PYTHON_INCLUDE_DIR}
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        "${CMAKE_CURRENT_LIST_DIR}/..")
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    if(NOT PYCXX_INCLUDE_DIR)
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        if(PyCXX_FIND_REQUIRED)
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            MESSAGE(FATAL_ERROR
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                "PyCXX not found; please set PYCXX_INCLUDE_DIR to "
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                "the location of CXX/Config.hxx")
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        else(PyCXX_FIND_REQUIRED)
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            MESSAGE(STATUS "PyCXX not found")
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            unset(PYCXX_FOUND)
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        endif(PyCXX_FIND_REQUIRED)
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    endif(NOT PYCXX_INCLUDE_DIR)
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endif(PYCXX_INCLUDE_DIR)
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# find the sources directory
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if(PYCXX_SOURCE_DIR)
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    # source directory specified, they'd better be there
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    if(NOT EXISTS "${PYCXX_SOURCE_DIR}/cxxextensions.c")
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        if(PyCXX_FIND_REQUIRED)
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            MESSAGE(FATAL_ERROR
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                "PyCXX: cxxextensions.c not found in PYCXX_SOURCE_DIR "
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                "${PYCXX_SOURCE_DIR}")
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        else(PyCXX_FIND_REQUIRED)
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            MESSAGE(WARNING
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                "PyCXX: cxxextensions.c not found in PYCXX_SOURCE_DIR "
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                "${PYCXX_SOURCE_DIR}")
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            unset(PYCXX_FOUND)
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        endif(PyCXX_FIND_REQUIRED)
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    endif(NOT EXISTS "${PYCXX_SOURCE_DIR}/cxxextensions.c")
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else(PYCXX_SOURCE_DIR)
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    # check in 'standard' places
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    find_path(PYCXX_SOURCE_DIR cxxextensions.c
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        "${PYCXX_INCLUDE_DIR}/CXX"
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        "${PYCXX_INCLUDE_DIR}/Src"
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        "${PYTHON_INCLUDE_DIR}/CXX"
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        "${PYTHON_INCLUDE_DIR}/Src"
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        "${CMAKE_CURRENT_LIST_DIR}/../Src"
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        "${CMAKE_CURRENT_LIST_DIR}/../CXX")
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    if(NOT PYCXX_SOURCE_DIR)
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        if(PyCXX_FIND_REQUIRED)
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            MESSAGE(FATAL_ERROR
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                "PyCXX not found; please set PYCXX_SOURCE_DIR to "
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                "the location of cxxextensions.c")
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        else(PyCXX_FIND_REQUIRED)
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            MESSAGE(STATUS "PyCXX not found")
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            unset(PYCXX_FOUND)
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        endif(PyCXX_FIND_REQUIRED)
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    endif(NOT PYCXX_SOURCE_DIR)
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endif(PYCXX_SOURCE_DIR)
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# Find PyCXX Version
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if(PYCXX_INCLUDE_DIR AND PYCXX_SOURCE_DIR)
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    file(READ ${PYCXX_INCLUDE_DIR}/CXX/Version.hxx PYCXX_VERSION_H)
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    foreach(item IN ITEMS MAJOR MINOR PATCH)
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        string(REGEX REPLACE
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            ".*#define[ \t]+PYCXX_VERSION_${item}[ \t]+([0-9]+).*"
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            "\\1" PYCXX_VERSION_${item}
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            "${PYCXX_VERSION_H}"
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        )
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    endforeach()
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    set(PYCXX_VERSION ${PYCXX_VERSION_MAJOR}.${PYCXX_VERSION_MINOR}.${PYCXX_VERSION_PATCH})
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endif()
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# see what we've got
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if(PYCXX_FOUND)
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    MESSAGE(STATUS "PyCXX found:")
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    MESSAGE(STATUS "  Headers:  ${PYCXX_INCLUDE_DIR}")
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    MESSAGE(STATUS "  Sources:  ${PYCXX_SOURCE_DIR}")
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    MESSAGE(STATUS "  Version:  ${PYCXX_VERSION}")
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    # Build the list of sources for convenience
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    set(PYCXX_SOURCES
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        ${PYCXX_SOURCE_DIR}/cxxextensions.c
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        ${PYCXX_SOURCE_DIR}/cxx_extensions.cxx
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        ${PYCXX_SOURCE_DIR}/cxxsupport.cxx
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        ${PYCXX_SOURCE_DIR}/IndirectPythonInterface.cxx
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    )
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    #set old 6.2 pycxx compatibility  
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    list(APPEND PYCXX_SOURCES ${PYCXX_SOURCE_DIR}/cxx_exceptions.cxx)
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    add_definitions(-DPYCXX_6_2_COMPATIBILITY)
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    #end old compatibility
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else(PYCXX_FOUND)
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    MESSAGE(STATUS "PyCXX not found")
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endif(PYCXX_FOUND)
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