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