jamie@126: # ===========================================================================
jamie@126: #      http://www.gnu.org/software/autoconf-archive/ax_python_devel.html
jamie@126: # ===========================================================================
jamie@126: #
jamie@126: # SYNOPSIS
jamie@126: #
jamie@126: #   AX_PYTHON_DEVEL([version])
jamie@126: #
jamie@126: # DESCRIPTION
jamie@126: #
jamie@126: #   Note: Defines as a precious variable "PYTHON_VERSION". Don't override it
jamie@126: #   in your configure.ac.
jamie@126: #
jamie@126: #   This macro checks for Python and tries to get the include path to
jamie@126: #   'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS)
jamie@126: #   output variables. It also exports $(PYTHON_EXTRA_LIBS) and
jamie@126: #   $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code.
jamie@126: #
jamie@126: #   You can search for some particular version of Python by passing a
jamie@126: #   parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please
jamie@126: #   note that you *have* to pass also an operator along with the version to
jamie@126: #   match, and pay special attention to the single quotes surrounding the
jamie@126: #   version number. Don't use "PYTHON_VERSION" for this: that environment
jamie@126: #   variable is declared as precious and thus reserved for the end-user.
jamie@126: #
jamie@126: #   This macro should work for all versions of Python >= 2.1.0. As an end
jamie@126: #   user, you can disable the check for the python version by setting the
jamie@126: #   PYTHON_NOVERSIONCHECK environment variable to something else than the
jamie@126: #   empty string.
jamie@126: #
jamie@126: #   If you need to use this macro for an older Python version, please
jamie@126: #   contact the authors. We're always open for feedback.
jamie@126: #
jamie@126: # LICENSE
jamie@126: #
jamie@126: #   Copyright (c) 2009 Sebastian Huber <sebastian-huber@web.de>
jamie@126: #   Copyright (c) 2009 Alan W. Irwin <irwin@beluga.phys.uvic.ca>
jamie@126: #   Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net>
jamie@126: #   Copyright (c) 2009 Andrew Collier <colliera@ukzn.ac.za>
jamie@126: #   Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org>
jamie@126: #   Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org>
jamie@126: #
jamie@126: #   This program is free software: you can redistribute it and/or modify it
jamie@126: #   under the terms of the GNU General Public License as published by the
jamie@126: #   Free Software Foundation, either version 3 of the License, or (at your
jamie@126: #   option) any later version.
jamie@126: #
jamie@126: #   This program is distributed in the hope that it will be useful, but
jamie@126: #   WITHOUT ANY WARRANTY; without even the implied warranty of
jamie@126: #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
jamie@126: #   Public License for more details.
jamie@126: #
jamie@126: #   You should have received a copy of the GNU General Public License along
jamie@126: #   with this program. If not, see <http://www.gnu.org/licenses/>.
jamie@126: #
jamie@126: #   As a special exception, the respective Autoconf Macro's copyright owner
jamie@126: #   gives unlimited permission to copy, distribute and modify the configure
jamie@126: #   scripts that are the output of Autoconf when processing the Macro. You
jamie@126: #   need not follow the terms of the GNU General Public License when using
jamie@126: #   or distributing such scripts, even though portions of the text of the
jamie@126: #   Macro appear in them. The GNU General Public License (GPL) does govern
jamie@126: #   all other use of the material that constitutes the Autoconf Macro.
jamie@126: #
jamie@126: #   This special exception to the GPL applies to versions of the Autoconf
jamie@126: #   Macro released by the Autoconf Archive. When you make and distribute a
jamie@126: #   modified version of the Autoconf Macro, you may extend this special
jamie@126: #   exception to the GPL to apply to your modified version as well.
jamie@126: 
jamie@126: #serial 8
jamie@126: 
jamie@126: AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
jamie@126: AC_DEFUN([AX_PYTHON_DEVEL],[
jamie@126: 	#
jamie@126: 	# Allow the use of a (user set) custom python version
jamie@126: 	#
jamie@126: 	AC_ARG_VAR([PYTHON_VERSION],[The installed Python
jamie@126: 		version to use, for example '2.3'. This string
jamie@126: 		will be appended to the Python interpreter
jamie@126: 		canonical name.])
jamie@126: 
jamie@126: 	AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
jamie@126: 	if test -z "$PYTHON"; then
jamie@126: 	   AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path])
jamie@126: 	   PYTHON_VERSION=""
jamie@126: 	fi
jamie@126: 
jamie@126: 	#
jamie@126: 	# Check for a version of Python >= 2.1.0
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
jamie@126: 	ac_supports_python_ver=`$PYTHON -c "import sys; \
jamie@126: 		ver = sys.version.split ()[[0]]; \
jamie@126: 		print (ver >= '2.1.0')"`
jamie@126: 	if test "$ac_supports_python_ver" != "True"; then
jamie@126: 		if test -z "$PYTHON_NOVERSIONCHECK"; then
jamie@126: 			AC_MSG_RESULT([no])
jamie@126: 			AC_MSG_FAILURE([
jamie@126: This version of the AC@&t@_PYTHON_DEVEL macro
jamie@126: doesn't work properly with versions of Python before
jamie@126: 2.1.0. You may need to re-run configure, setting the
jamie@126: variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG,
jamie@126: PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
jamie@126: Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
jamie@126: to something else than an empty string.
jamie@126: ])
jamie@126: 		else
jamie@126: 			AC_MSG_RESULT([skip at user request])
jamie@126: 		fi
jamie@126: 	else
jamie@126: 		AC_MSG_RESULT([yes])
jamie@126: 	fi
jamie@126: 
jamie@126: 	#
jamie@126: 	# if the macro parameter ``version'' is set, honour it
jamie@126: 	#
jamie@126: 	if test -n "$1"; then
jamie@126: 		AC_MSG_CHECKING([for a version of Python $1])
jamie@126: 		ac_supports_python_ver=`$PYTHON -c "import sys; \
jamie@126: 			ver = sys.version.split ()[[0]]; \
jamie@126: 			print (ver $1)"`
jamie@126: 		if test "$ac_supports_python_ver" = "True"; then
jamie@126: 		   AC_MSG_RESULT([yes])
jamie@126: 		else
jamie@126: 			AC_MSG_RESULT([no])
jamie@126: 			AC_MSG_ERROR([this package requires Python $1.
jamie@126: If you have it installed, but it isn't the default Python
jamie@126: interpreter in your system path, please pass the PYTHON_VERSION
jamie@126: variable to configure. See ``configure --help'' for reference.
jamie@126: ])
jamie@126: 			PYTHON_VERSION=""
jamie@126: 		fi
jamie@126: 	fi
jamie@126: 
jamie@126: 	#
jamie@126: 	# Check if you have distutils, else fail
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING([for the distutils Python package])
jamie@126: 	ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`
jamie@126: 	if test -z "$ac_distutils_result"; then
jamie@126: 		AC_MSG_RESULT([yes])
jamie@126: 	else
jamie@126: 		AC_MSG_RESULT([no])
jamie@126: 		AC_MSG_ERROR([cannot import Python module "distutils".
jamie@126: Please check your Python installation. The error was:
jamie@126: $ac_distutils_result])
jamie@126: 		PYTHON_VERSION=""
jamie@126: 	fi
jamie@126: 
jamie@126: 	#
jamie@126: 	# Check for Python include path
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING([for Python include path])
jamie@126: 	if test -z "$PYTHON_CPPFLAGS"; then
jamie@126: 		python_path=`$PYTHON -c "import distutils.sysconfig; \
jamie@126: 			print (distutils.sysconfig.get_python_inc ());"`
jamie@126: 		if test -n "${python_path}"; then
jamie@126: 			python_path="-I$python_path"
jamie@126: 		fi
jamie@126: 		PYTHON_CPPFLAGS=$python_path
jamie@126: 	fi
jamie@126: 	AC_MSG_RESULT([$PYTHON_CPPFLAGS])
jamie@126: 	AC_SUBST([PYTHON_CPPFLAGS])
jamie@126: 
jamie@126: 	#
jamie@126: 	# Check for Python library path
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING([for Python library path])
jamie@126: 	if test -z "$PYTHON_LDFLAGS"; then
jamie@126: 		# (makes two attempts to ensure we've got a version number
jamie@126: 		# from the interpreter)
jamie@126: 		ac_python_version=`cat<<EOD | $PYTHON -
jamie@126: 
jamie@126: # join all versioning strings, on some systems
jamie@126: # major/minor numbers could be in different list elements
jamie@126: from distutils.sysconfig import *
jamie@126: ret = ''
jamie@126: for e in get_config_vars ('VERSION'):
jamie@126: 	if (e != None):
jamie@126: 		ret += e
jamie@126: print (ret)
jamie@126: EOD`
jamie@126: 
jamie@126: 		if test -z "$ac_python_version"; then
jamie@126: 			if test -n "$PYTHON_VERSION"; then
jamie@126: 				ac_python_version=$PYTHON_VERSION
jamie@126: 			else
jamie@126: 				ac_python_version=`$PYTHON -c "import sys; \
jamie@126: 					print (sys.version[[:3]])"`
jamie@126: 			fi
jamie@126: 		fi
jamie@126: 
jamie@126: 		# Make the versioning information available to the compiler
jamie@126: 		AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
jamie@126:                                    [If available, contains the Python version number currently in use.])
jamie@126: 
jamie@126: 		# First, the library directory:
jamie@126: 		ac_python_libdir=`cat<<EOD | $PYTHON -
jamie@126: 
jamie@126: # There should be only one
jamie@126: import distutils.sysconfig
jamie@126: for e in distutils.sysconfig.get_config_vars ('LIBDIR'):
jamie@126: 	if e != None:
jamie@126: 		print (e)
jamie@126: 		break
jamie@126: EOD`
jamie@126: 
jamie@126: 		# Before checking for libpythonX.Y, we need to know
jamie@126: 		# the extension the OS we're on uses for libraries
jamie@126: 		# (we take the first one, if there's more than one fix me!):
jamie@126: 		ac_python_soext=`$PYTHON -c \
jamie@126: 		  "import distutils.sysconfig; \
jamie@126: 		  print (distutils.sysconfig.get_config_vars('SO')[[0]])"`
jamie@126: 
jamie@126: 		# Now, for the library:
jamie@126: 		ac_python_soname=`$PYTHON -c \
jamie@126: 		  "import distutils.sysconfig; \
jamie@126: 		  print (distutils.sysconfig.get_config_vars('LDLIBRARY')[[0]])"`
jamie@126: 
jamie@126: 		# Strip away extension from the end to canonicalize its name:
jamie@126: 		ac_python_library=`echo "$ac_python_soname" | sed "s/${ac_python_soext}$//"`
jamie@126: 
jamie@126: 		# This small piece shamelessly adapted from PostgreSQL python macro;
jamie@126: 		# credits goes to momjian, I think. I'd like to put the right name
jamie@126: 		# in the credits, if someone can point me in the right direction... ?
jamie@126: 		#
jamie@126: 		if test -n "$ac_python_libdir" -a -n "$ac_python_library" \
jamie@126: 			-a x"$ac_python_library" != x"$ac_python_soname"
jamie@126: 		then
jamie@126: 			# use the official shared library
jamie@126: 			ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
jamie@126: 			PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library"
jamie@126: 		else
jamie@126: 			# old way: use libpython from python_configdir
jamie@126: 			ac_python_libdir=`$PYTHON -c \
jamie@126: 			  "from distutils.sysconfig import get_python_lib as f; \
jamie@126: 			  import os; \
jamie@126: 			  print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
jamie@126: 			PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version"
jamie@126: 		fi
jamie@126: 
jamie@126: 		if test -z "PYTHON_LDFLAGS"; then
jamie@126: 			AC_MSG_ERROR([
jamie@126:   Cannot determine location of your Python DSO. Please check it was installed with
jamie@126:   dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand.
jamie@126: 			])
jamie@126: 		fi
jamie@126: 	fi
jamie@126: 	AC_MSG_RESULT([$PYTHON_LDFLAGS])
jamie@126: 	AC_SUBST([PYTHON_LDFLAGS])
jamie@126: 
jamie@126: 	#
jamie@126: 	# Check for site packages
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING([for Python site-packages path])
jamie@126: 	if test -z "$PYTHON_SITE_PKG"; then
jamie@126: 		PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
jamie@126: 			print (distutils.sysconfig.get_python_lib(0,0));"`
jamie@126: 	fi
jamie@126: 	AC_MSG_RESULT([$PYTHON_SITE_PKG])
jamie@126: 	AC_SUBST([PYTHON_SITE_PKG])
jamie@126: 
jamie@126: 	#
jamie@126: 	# libraries which must be linked in when embedding
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING(python extra libraries)
jamie@126: 	if test -z "$PYTHON_EXTRA_LIBS"; then
jamie@126: 	   PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
jamie@126:                 conf = distutils.sysconfig.get_config_var; \
jamie@126:                 print (conf('LOCALMODLIBS') + ' ' + conf('LIBS'))"`
jamie@126: 	fi
jamie@126: 	AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
jamie@126: 	AC_SUBST(PYTHON_EXTRA_LIBS)
jamie@126: 
jamie@126: 	#
jamie@126: 	# linking flags needed when embedding
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING(python extra linking flags)
jamie@126: 	if test -z "$PYTHON_EXTRA_LDFLAGS"; then
jamie@126: 		PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
jamie@126: 			conf = distutils.sysconfig.get_config_var; \
jamie@126: 			print (conf('LINKFORSHARED'))"`
jamie@126: 	fi
jamie@126: 	AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
jamie@126: 	AC_SUBST(PYTHON_EXTRA_LDFLAGS)
jamie@126: 
jamie@126: 	#
jamie@126: 	# final check to see if everything compiles alright
jamie@126: 	#
jamie@126: 	AC_MSG_CHECKING([consistency of all components of python development environment])
jamie@126: 	# save current global flags
jamie@126: 	ac_save_LIBS="$LIBS"
jamie@126: 	ac_save_CPPFLAGS="$CPPFLAGS"
jamie@126: 	LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS"
jamie@126: 	CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
jamie@126: 	AC_LANG_PUSH([C])
jamie@126: 	AC_LINK_IFELSE([
jamie@126: 		AC_LANG_PROGRAM([[#include <Python.h>]],
jamie@126: 				[[Py_Initialize();]])
jamie@126: 		],[pythonexists=yes],[pythonexists=no])
jamie@126: 	AC_LANG_POP([C])
jamie@126: 	# turn back to default flags
jamie@126: 	CPPFLAGS="$ac_save_CPPFLAGS"
jamie@126: 	LIBS="$ac_save_LIBS"
jamie@126: 
jamie@126: 	AC_MSG_RESULT([$pythonexists])
jamie@126: 
jamie@126:         if test ! "x$pythonexists" = "xyes"; then
jamie@126: 	   AC_MSG_FAILURE([
jamie@126:   Could not link test program to Python. Maybe the main Python library has been
jamie@126:   installed in some non-standard library path. If so, pass it to configure,
jamie@126:   via the LDFLAGS environment variable.
jamie@126:   Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
jamie@126:   ============================================================================
jamie@126:    ERROR!
jamie@126:    You probably have to install the development version of the Python package
jamie@126:    for your distribution.  The exact name of this package varies among them.
jamie@126:   ============================================================================
jamie@126: 	   ])
jamie@126: 	  PYTHON_VERSION=""
jamie@126: 	fi
jamie@126: 
jamie@126: 	#
jamie@126: 	# all done!
jamie@126: 	#
jamie@126: ])