cmake/FindCython.cmake

   1 #.rst:
   2 # FindCython
   3 # ----------
   4 #
   5 # Find ``cython`` executable.
   6 #
   7 # This module defines the following variables:
   8 #
   9 #  ``CYTHON_EXECUTABLE``
  10 #    path to the ``cython`` program
  11 #
  12 #  ``CYTHON_VERSION``
  13 #    version of ``cython``
  14 #
  15 #  ``CYTHON_FOUND``
  16 #    true if the program was found
  17 #
  18 # See also UseCython.cmake
  19 #
  20 #=============================================================================
  21 # Copyright 2011 Kitware, Inc.
  22 #
  23 # Licensed under the Apache License, Version 2.0 (the "License");
  24 # you may not use this file except in compliance with the License.
  25 # You may obtain a copy of the License at
  26 #
  27 #     http://www.apache.org/licenses/LICENSE-2.0
  28 #
  29 # Unless required by applicable law or agreed to in writing, software
  30 # distributed under the License is distributed on an "AS IS" BASIS,
  31 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  32 # See the License for the specific language governing permissions and
  33 # limitations under the License.
  34 #=============================================================================
  35
  36 # Use the Cython executable that lives next to the Python executable
  37 # if it is a local installation.
  38 find_package(PythonInterp)
  39 if(PYTHONINTERP_FOUND)
  40   get_filename_component(_python_path ${PYTHON_EXECUTABLE} PATH)
  41   find_program(CYTHON_EXECUTABLE
  42                NAMES cython cython.bat cython3
  43                HINTS ${_python_path}
  44                DOC "path to the cython executable")
  45 else()
  46   find_program(CYTHON_EXECUTABLE
  47                NAMES cython cython.bat cython3
  48                DOC "path to the cython executable")
  49 endif()
  50
  51 if(CYTHON_EXECUTABLE)
  52   set(CYTHON_version_command ${CYTHON_EXECUTABLE} --version)
  53
  54   execute_process(COMMAND ${CYTHON_version_command}
  55                   OUTPUT_VARIABLE CYTHON_version_output
  56                   ERROR_VARIABLE CYTHON_version_error
  57                   RESULT_VARIABLE CYTHON_version_result
  58                   OUTPUT_STRIP_TRAILING_WHITESPACE)
  59
  60   if(NOT ${CYTHON_version_result} EQUAL 0)
  61     set(_error_msg "Command \"${CYTHON_version_command}\" failed with")
  62     set(_error_msg "${_error_msg} output:\n${CYTHON_version_error}")
  63     message(SEND_ERROR "${_error_msg}")
  64   else()
  65     if("${CYTHON_version_output}" MATCHES "^[Cc]ython version ([^,]+)")
  66       set(CYTHON_VERSION "${CMAKE_MATCH_1}")
  67     endif()
  68   endif()
  69 endif()
  70
  71 include(FindPackageHandleStandardArgs)
  72 FIND_PACKAGE_HANDLE_STANDARD_ARGS(Cython REQUIRED_VARS CYTHON_EXECUTABLE)
  73
  74 mark_as_advanced(CYTHON_EXECUTABLE)
  75
  76 include(UseCython)
  77