From d141a0a99273e2d8d0671fb2a2fff49dc3a9e545 Mon Sep 17 00:00:00 2001
From: Marcel Loose <loose@astron.nl>
Date: Fri, 4 Nov 2016 13:06:52 +0000
Subject: [PATCH] Task #9841: Added generic CMake find module for Python
modules.
---
CMake/FindPythonModule.cmake | 83 ++++++++++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
create mode 100644 CMake/FindPythonModule.cmake
diff --git a/CMake/FindPythonModule.cmake b/CMake/FindPythonModule.cmake
new file mode 100644
index 00000000000..bc54e795eeb
--- /dev/null
+++ b/CMake/FindPythonModule.cmake
@@ -0,0 +1,83 @@
+# - Try to find a Python module.
+# The macro PYTHON_FIND_PACKAGE(module) tries to find python module <module>.
+#
+# Variables defined by this module:
+# PYTHON_<MODULE> - file path of python <module>, if found (cached)
+# PYTHON_<MODULE>_FOUND - true if python <module> was found, else false.
+
+# Copyright (C) 2015
+# ASTRON (Netherlands Institute for Radio Astronomy)
+# P.O.Box 2, 7990 AA Dwingeloo, The Netherlands
+#
+# This file is part of the LOFAR software suite.
+# The LOFAR software suite is free software: you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# The LOFAR software suite is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with the LOFAR software suite. If not, see <http://www.gnu.org/licenses/>.
+#
+# $Id$
+
+# Search for the Python interpreter.
+find_package(PythonInterp)
+
+# -----------------------------------------------------------------------------
+# find_python_module(module [REQUIRED])
+#
+# Find the python module <module>.
+# Set variable PYTHON_<MODULE> to the file path of <module> (cached).
+# Set variable PYTHON_<MODULE>_FOUND to TRUE if <module> was found, else
+# set it to FALSE.
+# The REQUIRED option stops processing with an error message if the module
+# <module> cannot be found.
+# -----------------------------------------------------------------------------
+macro(find_python_module _module)
+
+ # Name of module in uppercase.
+ string(TOUPPER "${_module}" _MODULE)
+
+ # Try to find the python module, if we have not found it yet.
+ if(NOT PYTHON_${_MODULE})
+
+ # Check if option REQUIRED was given.
+ if(NOT "${ARGN}" STREQUAL "")
+ if("${ARGN}" STREQUAL "REQUIRED")
+ set(PYTHON_${_MODULE}_FIND_REQUIRED TRUE)
+ else()
+ message(FATAL_ERROR
+ "find_python_module called with invalid argument \"${ARGN}\"")
+ endif()
+ endif()
+
+ # Try to import the python module we need to find, and get its file path.
+ if(PYTHON_EXECUTABLE)
+ set(_cmd "import ${_module}; print ${_module}.__file__")
+ execute_process(
+ COMMAND "${PYTHON_EXECUTABLE}" "-c" "${_cmd}"
+ RESULT_VARIABLE _result
+ OUTPUT_VARIABLE _output
+ ERROR_QUIET
+ OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+ # Set PYTHON_<MODULE> variable in the cache, if <module> was found.
+ if(_result EQUAL 0)
+ set(PYTHON_${_MODULE} ${_output} CACHE FILEPATH
+ "Path to python module ${_module}")
+ endif()
+
+ endif()
+ endif()
+
+ # Report result, and set PYTHON_<MODULE>_FOUND
+ include(FindPackageHandleStandardArgs)
+ find_package_handle_standard_args(PYTHON_${_MODULE} DEFAULT_MSG
+ PYTHON_${_MODULE})
+
+endmacro()
--
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