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# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_python_devel.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_PYTHON_DEVEL([version])
#
# DESCRIPTION
#
# Note: This script has been modified for ROSE.
#
# Note: Defines as a precious variable "PYTHON_VERSION". Don't override it
# in your configure.ac.
#
# This macro checks for Python and tries to get the include path to
# 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS)
# output variables. It also exports $(PYTHON_EXTRA_LIBS) and
# $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code.
#
# You can search for some particular version of Python by passing a
# parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please
# note that you *have* to pass also an operator along with the version to
# match, and pay special attention to the single quotes surrounding the
# version number. Don't use "PYTHON_VERSION" for this: that environment
# variable is declared as precious and thus reserved for the end-user.
#
# This macro should work for all versions of Python >= 2.1.0. As an end
# user, you can disable the check for the python version by setting the
# PYTHON_NOVERSIONCHECK environment variable to something else than the
# empty string.
#
# If you need to use this macro for an older Python version, please
# contact the authors. We're always open for feedback.
#
# LICENSE
#
# Copyright (c) 2009 Sebastian Huber <sebastian-huber@web.de>
# Copyright (c) 2009 Alan W. Irwin <irwin@beluga.phys.uvic.ca>
# Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net>
# Copyright (c) 2009 Andrew Collier <colliera@ukzn.ac.za>
# Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org>
# Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org>
#
# This program 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
AC_DEFUN([AX_PYTHON_DEVEL],[
#
# Allow the use of a (user set) custom python version
#
AC_ARG_WITH(python,
[ --with-python=PATH Specify the path to the Python interpreter])
if test "$with_python" = "no"; then
# User does not want us to use python even if it's available.
PYTHON=
elif test "$with_python" = "yes"; then
# User wants python, but we should find it ourselves
AC_PATH_PROG([PYTHON], [python])
if test "$PYTHON" = ""; then
AC_MSG_ERROR(["python" executable not found but "--with-python=yes" was specified])
fi
elif test "$with_python" = ""; then
# User doesn't care if we use python or not
AC_PATH_PROG([PYTHON], [python])
else
# User is telling us where to find the python interpreter
PYTHON="$with_python"
fi
if test "$PYTHON" != ""; then
AC_SUBST([PYTHON], $PYTHON)
#
# determine if python is the right version
#
AC_MSG_CHECKING([for a version of Python >= $1, < $2])
ac_python_version=`$PYTHON -c "import sys; print(sys.version.split()[[0]])"`
ac_supports_python_ver=`$PYTHON -c "print ('$1' <= '$ac_python_version' < '$2')"`
if test "$ac_supports_python_ver" = "True"; then
AC_MSG_RESULT([yes ($ac_python_version)])
AC_DEFINE([PYTHON_VERSION], ($ac_python_version), "Version of Python selected when building ROSE.")
else
AC_MSG_RESULT([no ($ac_python_version)])
AC_MSG_ERROR([this package requires Python >= $1 and < $2.
If you have it installed, but it isn't the default Python
interpreter in your system path, please configure --with-python=PATH to
select the correct interpreter. See ``configure --help'' for reference.
])
fi
#
# Check if you have distutils, else fail
#
AC_MSG_CHECKING([for the distutils Python package])
ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`
if test -z "$ac_distutils_result"; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot import Python module "distutils".
Please check your Python installation. The error was:
$ac_distutils_result])
fi
#
# Check for Python include path
#
AC_MSG_CHECKING([for Python include path])
if test -z "$PYTHON_CPPFLAGS"; then
python_path=`$PYTHON -c "import distutils.sysconfig; \
print (distutils.sysconfig.get_python_inc ());"`
if test -n "${python_path}"; then
python_path="-I$python_path"
fi
PYTHON_CPPFLAGS=$python_path
fi
AC_MSG_RESULT([$PYTHON_CPPFLAGS])
AC_SUBST([PYTHON_CPPFLAGS])
#
# Check for Python library path
#
AC_MSG_CHECKING([for Python library path])
if test -z "$PYTHON_LDFLAGS"; then
# (makes two attempts to ensure we've got a version number from the interpreter)
ac_python_version=`cat<<EOD | $PYTHON -
# join all versioning strings, on some systems
# major/minor numbers could be in different list elements
from distutils.sysconfig import *
ret = ''
for e in get_config_vars ('VERSION'):
if (e != None):
ret += e
print (ret)
EOD`
if test -z "$ac_python_version"; then
ac_python_version=`$PYTHON -c "import sys; \
print (sys.version[[:3]])"`
fi
# Make the versioning information available to the compiler
AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
[If available, contains the Python version number currently in use.])
# First, the library directory:
ac_python_libdir=`cat<<EOD | $PYTHON -
# There should be only one
import distutils.sysconfig
for e in distutils.sysconfig.get_config_vars ('LIBDIR'):
if e != None:
print (e)
break
EOD`
# Before checking for libpythonX.Y, we need to know
# the extension the OS we're on uses for libraries
# (we take the first one, if there's more than one fix me!):
ac_python_soext=`$PYTHON -c \
"import distutils.sysconfig; \
print (distutils.sysconfig.get_config_vars('SO')[[0]])"`
# Now, for the library:
ac_python_soname=`$PYTHON -c \
"import distutils.sysconfig; \
print (distutils.sysconfig.get_config_vars('LDLIBRARY')[[0]])"`
# Strip away extension from the end to canonicalize its name:
ac_python_library=`echo "$ac_python_soname" | sed "s/${ac_python_soext}$//"`
# This small piece shamelessly adapted from PostgreSQL python macro;
# credits goes to momjian, I think. I'd like to put the right name
# in the credits, if someone can point me in the right direction... ?
if test -n "$ac_python_libdir" -a -n "$ac_python_library" -a x"$ac_python_library" != x"$ac_python_soname"; then
# use the official shared library
ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library"
else
# old way: use libpython from python_configdir
ac_python_libdir=`$PYTHON -c \
"from distutils.sysconfig import get_python_lib as f; \
import os; \
print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version"
fi
if test -z "PYTHON_LDFLAGS"; then
AC_MSG_ERROR([Cannot determine location of your Python DSO. Please check it was installed with
dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand.])
fi
fi
AC_MSG_RESULT([$PYTHON_LDFLAGS])
AC_SUBST([PYTHON_LDFLAGS])
#
# Check for site packages
#
AC_MSG_CHECKING([for Python site-packages path])
if test -z "$PYTHON_SITE_PKG"; then
PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
print (distutils.sysconfig.get_python_lib(0,0));"`
fi
AC_MSG_RESULT([$PYTHON_SITE_PKG])
AC_SUBST([PYTHON_SITE_PKG])
#
# libraries which must be linked in when embedding
#
AC_MSG_CHECKING(python extra libraries)
if test -z "$PYTHON_EXTRA_LIBS"; then
PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
conf = distutils.sysconfig.get_config_var; \
print (conf('LOCALMODLIBS') + ' ' + conf('LIBS'))"`
fi
AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
AC_SUBST(PYTHON_EXTRA_LIBS)
#
# linking flags needed when embedding
#
AC_MSG_CHECKING(python extra linking flags)
if test -z "$PYTHON_EXTRA_LDFLAGS"; then
PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
conf = distutils.sysconfig.get_config_var; \
print (conf('LINKFORSHARED'))"`
fi
AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
AC_SUBST(PYTHON_EXTRA_LDFLAGS)
#
# final check to see if everything compiles alright
#
AC_MSG_CHECKING([consistency of all components of python development environment])
# save current global flags
ac_save_LIBS="$LIBS"
ac_save_CPPFLAGS="$CPPFLAGS"
LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS"
CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
AC_LANG_PUSH([C])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[#include <Python.h>]],
[[Py_Initialize();]])],
[pythonexists=yes],
[pythonexists=no])
AC_LANG_POP([C])
# turn back to default flags
CPPFLAGS="$ac_save_CPPFLAGS"
LIBS="$ac_save_LIBS"
AC_MSG_RESULT([$pythonexists])
fi
])