111 lines
4.2 KiB
CMake
111 lines
4.2 KiB
CMake
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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FindSWIG
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--------
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Find the Simplified Wrapper and Interface Generator (SWIG_) executable.
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This module finds an installed SWIG and determines its version. If a
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``COMPONENTS`` or ``OPTIONAL_COMPONENTS`` argument is given to ``find_package``,
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it will also determine supported target languages. The module sents the
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following variables:
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``SWIG_FOUND``
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Whether SWIG and any required components were found on the system.
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``SWIG_EXECUTABLE``
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Path to the SWIG executable.
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``SWIG_DIR``
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Path to the installed SWIG ``Lib`` directory (result of ``swig -swiglib``).
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``SWIG_VERSION``
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SWIG executable version (result of ``swig -version``).
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``SWIG_<lang>_FOUND``
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If ``COMPONENTS`` or ``OPTIONAL_COMPONENTS`` are requested, each available
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target language ``<lang>`` (lowercase) will be set to TRUE.
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Any ``COMPONENTS`` given to ``find_package`` should be the names of supported
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target languages as provided to the LANGUAGE argument of ``swig_add_library``,
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such as ``python`` or ``perl5``. Language names *must* be lowercase.
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All information is collected from the ``SWIG_EXECUTABLE``, so the version
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to be found can be changed from the command line by means of setting
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``SWIG_EXECUTABLE``.
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Example usage requiring SWIG 4.0 or higher and Python language support, with
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optional Fortran support:
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.. code-block:: cmake
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find_package(SWIG 4.0 COMPONENTS python OPTIONAL_COMPONENTS fortran)
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if(SWIG_FOUND)
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message("SWIG found: ${SWIG_EXECUTABLE}")
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if(NOT SWIG_fortran_FOUND)
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message(WARNING "SWIG Fortran bindings cannot be generated")
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endif()
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endif()
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.. _`SWIG`: http://swig.org
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#]=======================================================================]
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find_program(SWIG_EXECUTABLE NAMES swig4.0 swig3.0 swig2.0 swig)
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if(SWIG_EXECUTABLE)
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execute_process(COMMAND ${SWIG_EXECUTABLE} -swiglib
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OUTPUT_VARIABLE SWIG_swiglib_output
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ERROR_VARIABLE SWIG_swiglib_error
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RESULT_VARIABLE SWIG_swiglib_result)
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if(SWIG_swiglib_result)
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if(SWIG_FIND_REQUIRED)
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message(SEND_ERROR "Command \"${SWIG_EXECUTABLE} -swiglib\" failed with output:\n${SWIG_swiglib_error}")
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else()
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message(STATUS "Command \"${SWIG_EXECUTABLE} -swiglib\" failed with output:\n${SWIG_swiglib_error}")
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endif()
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else()
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string(REGEX REPLACE "[\n\r]+" ";" SWIG_swiglib_output ${SWIG_swiglib_output})
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find_path(SWIG_DIR swig.swg PATHS ${SWIG_swiglib_output} NO_CMAKE_FIND_ROOT_PATH)
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if(SWIG_DIR)
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set(SWIG_USE_FILE ${CMAKE_CURRENT_LIST_DIR}/UseSWIG.cmake)
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execute_process(COMMAND ${SWIG_EXECUTABLE} -version
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OUTPUT_VARIABLE SWIG_version_output
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ERROR_VARIABLE SWIG_version_output
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RESULT_VARIABLE SWIG_version_result)
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if(SWIG_version_result)
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message(SEND_ERROR "Command \"${SWIG_EXECUTABLE} -version\" failed with output:\n${SWIG_version_output}")
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else()
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string(REGEX REPLACE ".*SWIG Version[^0-9.]*\([0-9.]+\).*" "\\1"
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SWIG_version_output "${SWIG_version_output}")
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set(SWIG_VERSION ${SWIG_version_output} CACHE STRING "Swig version" FORCE)
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endif()
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endif()
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endif()
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if(SWIG_FIND_COMPONENTS)
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execute_process(COMMAND ${SWIG_EXECUTABLE} -help
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OUTPUT_VARIABLE SWIG_swighelp_output
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ERROR_VARIABLE SWIG_swighelp_error
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RESULT_VARIABLE SWIG_swighelp_result)
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if(SWIG_swighelp_result)
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message(SEND_ERROR "Command \"${SWIG_EXECUTABLE} -help\" failed with output:\n${SWIG_swiglib_error}")
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else()
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string(REPLACE "\n" ";" SWIG_swighelp_output "${SWIG_swighelp_output}")
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foreach(SWIG_line IN LISTS SWIG_swighelp_output)
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if(SWIG_line MATCHES "-([A-Za-z0-9_]+) +- *Generate.*wrappers")
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set(SWIG_${CMAKE_MATCH_1}_FOUND TRUE)
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endif()
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endforeach()
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endif()
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endif()
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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find_package_handle_standard_args(
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SWIG HANDLE_COMPONENTS
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REQUIRED_VARS SWIG_EXECUTABLE SWIG_DIR
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VERSION_VAR SWIG_VERSION)
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mark_as_advanced(SWIG_DIR SWIG_VERSION SWIG_EXECUTABLE)
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