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# cmake/modules/python.cmake
#
# Copyright (C) 2006 Alan W. Irwin
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; version 2 of the License.
#
# PLplot 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 Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with the file PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# Module for determining Python bindings configuration options
# Options to enable Python bindings
if(DEFAULT_NO_BINDINGS)
option(ENABLE_python "Enable Python bindings" OFF)
else(DEFAULT_NO_BINDINGS)
option(ENABLE_python "Enable Python bindings" ON)
endif(DEFAULT_NO_BINDINGS)
if(ENABLE_python AND NOT BUILD_SHARED_LIBS)
message(STATUS "WARNING: "
"Python requires shared libraries. Disabling Python bindings")
set(ENABLE_python OFF CACHE BOOL "Enable Python bindings" FORCE)
endif(ENABLE_python AND NOT BUILD_SHARED_LIBS)
if(ENABLE_python AND NOT SWIG_FOUND)
message(STATUS "WARNING: "
"swig not found. Disabling Python bindings")
set(ENABLE_python OFF CACHE BOOL "Enable Python bindings" FORCE)
endif(ENABLE_python AND NOT SWIG_FOUND)
if(ENABLE_python)
# Check for Python interpreter (which also defines PYTHON_EXECUTABLE)
find_package(PythonInterp)
if(NOT PYTHONINTERP_FOUND)
message(STATUS "WARNING: "
"Python interpreter not found. Disabling Python bindings")
set(ENABLE_python OFF CACHE BOOL "Enable Python bindings" FORCE)
endif(NOT PYTHONINTERP_FOUND)
endif(ENABLE_python)
if(ENABLE_python)
# Check for Python libraries which defines
# PYTHON_LIBRARIES = path to the Python library
# PYTHON_INCLUDE_PATH = path to where Python.h is found
find_package(PythonLibs)
if(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_PATH)
message(STATUS "WARNING: "
"Python library and/or header not found. Disabling Python bindings")
set(ENABLE_python OFF CACHE BOOL "Enable Python bindings" FORCE)
endif(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_PATH)
endif(ENABLE_python)
if(ENABLE_python)
# NUMPY_INCLUDE_PATH = path to arrayobject.h for numpy.
#message(STATUS "DEBUG: NUMPY_INCLUDE_PATH = ${NUMPY_INCLUDE_PATH}")
if(NOT NUMPY_INCLUDE_PATH)
# Check for numpy installation.
execute_process(
COMMAND
${PYTHON_EXECUTABLE} -c "import numpy; print numpy.get_include()"
OUTPUT_VARIABLE NUMPY_INCLUDE_PATH_PARENT
RESULT_VARIABLE NUMPY_ERR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(NUMPY_ERR)
set(NUMPY_INCLUDE_PATH)
else(NUMPY_ERR)
# We use the full path name (including numpy on the end), but
# Double-check that all is well with that choice.
find_path(
NUMPY_INCLUDE_PATH
arrayobject.h
${NUMPY_INCLUDE_PATH_PARENT}/numpy
)
endif(NUMPY_ERR)
endif(NOT NUMPY_INCLUDE_PATH)
if(NOT NUMPY_INCLUDE_PATH)
message(STATUS "WARNING: "
"NumPy header not found. Disabling Python bindings")
set(ENABLE_python OFF CACHE BOOL "Enable Python bindings" FORCE)
endif(NOT NUMPY_INCLUDE_PATH)
endif(ENABLE_python)
if(ENABLE_python)
# This numpy installation bug found by Geoff.
option(EXCLUDE_PYTHON_LIBRARIES "Linux temporary workaround for numpy installation bug for non-system Python install prefix" OFF)
if(EXCLUDE_PYTHON_LIBRARIES)
set(PYTHON_LIBRARIES)
endif(EXCLUDE_PYTHON_LIBRARIES)
endif(ENABLE_python)
if(ENABLE_python)
# if CMAKE_INSTALL_EXEC_PREFIX is an empty string, must replace
# it with "/" to make PYTHON_INSTALL_TEMPLATE an absolute path to be
# consistent with all other installation paths.
if(CMAKE_INSTALL_EXEC_PREFIX)
set(PYTHON_INSTALL_TEMPLATE "${CMAKE_INSTALL_EXEC_PREFIX}")
else(CMAKE_INSTALL_EXEC_PREFIX)
set(PYTHON_INSTALL_TEMPLATE "/")
endif(CMAKE_INSTALL_EXEC_PREFIX)
# N.B. This is a nice way to obtain all sorts of Python information
# using distutils.
execute_process(
COMMAND
${PYTHON_EXECUTABLE} -c "from distutils import sysconfig; print sysconfig.get_python_lib(1,0,prefix='${PYTHON_INSTALL_TEMPLATE}')"
OUTPUT_VARIABLE PYTHON_INSTDIR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
# Get the Python version.
execute_process(
COMMAND
${PYTHON_EXECUTABLE} -c "import sys; print('%s.%s.%s' % sys.version_info[0:3])"
OUTPUT_VARIABLE PYTHON_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
)
message(STATUS "PYTHON_VERSION = ${PYTHON_VERSION}")
# Enable plsmem if the Python and Swig versions support it
transform_version(NUMERICAL_SWIG_MINIMUM_VERSION_FOR_PLSMEM "1.3.38")
transform_version(NUMERICAL_PYTHON_MINIMUM_VERSION_FOR_PLSMEM "2.6.0")
transform_version(NUMERICAL_SWIG_VERSION "${SWIG_VERSION}")
transform_version(NUMERICAL_PYTHON_VERSION "${PYTHON_VERSION}")
SET(PYTHON_HAVE_PYBUFFER OFF)
IF(NUMERICAL_SWIG_MINIMUM_VERSION_FOR_PLSMEM LESS NUMERICAL_SWIG_VERSION)
IF(NUMERICAL_PYTHON_MINIMUM_VERSION_FOR_PLSMEM LESS NUMERICAL_PYTHON_VERSION)
message(STATUS "Building Python binding with plsmem() support")
SET(PYTHON_HAVE_PYBUFFER ON)
ENDIF(NUMERICAL_PYTHON_MINIMUM_VERSION_FOR_PLSMEM LESS NUMERICAL_PYTHON_VERSION)
ENDIF(NUMERICAL_SWIG_MINIMUM_VERSION_FOR_PLSMEM LESS NUMERICAL_SWIG_VERSION)
endif(ENABLE_python)
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