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-# ===========================================================================
-# https://www.gnu.org/software/autoconf-archive/ax_python_devel.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-# AX_PYTHON_DEVEL([version[,optional]])
-#
-# DESCRIPTION
-#
-# 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_LIBS) 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.
-#
-# By default this will fail if it does not detect a development version of
-# python. If you want it to continue, set optional to true, like
-# AX_PYTHON_DEVEL([], [true]). The ax_python_devel_found variable will be
-# "no" if it fails.
-#
-# 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 <[email protected]>
-# Copyright (c) 2009 Alan W. Irwin
-# Copyright (c) 2009 Rafael Laboissiere <[email protected]>
-# Copyright (c) 2009 Andrew Collier
-# Copyright (c) 2009 Matteo Settenvini <[email protected]>
-# Copyright (c) 2009 Horst Knorr <[email protected]>
-# Copyright (c) 2013 Daniel Mullner <[email protected]>
-#
-# 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 <https://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.
-
-#serial 36
-
-AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
-AC_DEFUN([AX_PYTHON_DEVEL],[
- # Get whether it's optional
- if test -z "$2"; then
- ax_python_devel_optional=false
- else
- ax_python_devel_optional=$2
- fi
- ax_python_devel_found=yes
-
- #
- # Allow the use of a (user set) custom python version
- #
- AC_ARG_VAR([PYTHON_VERSION],[The installed Python
- version to use, for example '2.3'. This string
- will be appended to the Python interpreter
- canonical name.])
-
- AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
- if test -z "$PYTHON"; then
- AC_MSG_WARN([Cannot find python$PYTHON_VERSION in your system path])
- if ! $ax_python_devel_optional; then
- AC_MSG_ERROR([Giving up, python development not available])
- fi
- ax_python_devel_found=no
- PYTHON_VERSION=""
- fi
-
- if test $ax_python_devel_found = yes; then
- #
- # Check for a version of Python >= 2.1.0
- #
- AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
- ac_supports_python_ver=`$PYTHON -c "import sys; \
- ver = sys.version.split ()[[0]]; \
- print (ver >= '2.1.0')"`
- if test "$ac_supports_python_ver" != "True"; then
- if test -z "$PYTHON_NOVERSIONCHECK"; then
- AC_MSG_RESULT([no])
- AC_MSG_WARN([
-This version of the AC@&t@_PYTHON_DEVEL macro
-doesn't work properly with versions of Python before
-2.1.0. You may need to re-run configure, setting the
-variables PYTHON_CPPFLAGS, PYTHON_LIBS, PYTHON_SITE_PKG,
-PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
-Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
-to something else than an empty string.
-])
- if ! $ax_python_devel_optional; then
- AC_MSG_FAILURE([Giving up])
- fi
- ax_python_devel_found=no
- PYTHON_VERSION=""
- else
- AC_MSG_RESULT([skip at user request])
- fi
- else
- AC_MSG_RESULT([yes])
- fi
- fi
-
- if test $ax_python_devel_found = yes; then
- #
- # If the macro parameter ``version'' is set, honour it.
- # A Python shim class, VPy, is used to implement correct version comparisons via
- # string expressions, since e.g. a naive textual ">= 2.7.3" won't work for
- # Python 2.7.10 (the ".1" being evaluated as less than ".3").
- #
- if test -n "$1"; then
- AC_MSG_CHECKING([for a version of Python $1])
- cat << EOF > ax_python_devel_vpy.py
-class VPy:
- def vtup(self, s):
- return tuple(map(int, s.strip().replace("rc", ".").split(".")))
- def __init__(self):
- import sys
- self.vpy = tuple(sys.version_info)[[:3]]
- def __eq__(self, s):
- return self.vpy == self.vtup(s)
- def __ne__(self, s):
- return self.vpy != self.vtup(s)
- def __lt__(self, s):
- return self.vpy < self.vtup(s)
- def __gt__(self, s):
- return self.vpy > self.vtup(s)
- def __le__(self, s):
- return self.vpy <= self.vtup(s)
- def __ge__(self, s):
- return self.vpy >= self.vtup(s)
-EOF
- ac_supports_python_ver=`$PYTHON -c "import ax_python_devel_vpy; \
- ver = ax_python_devel_vpy.VPy(); \
- print (ver $1)"`
- rm -rf ax_python_devel_vpy*.py* __pycache__/ax_python_devel_vpy*.py*
- if test "$ac_supports_python_ver" = "True"; then
- AC_MSG_RESULT([yes])
- else
- AC_MSG_RESULT([no])
- AC_MSG_WARN([this package requires Python $1.
-If you have it installed, but it isn't the default Python
-interpreter in your system path, please pass the PYTHON_VERSION
-variable to configure. See ``configure --help'' for reference.
-])
- if ! $ax_python_devel_optional; then
- AC_MSG_ERROR([Giving up])
- fi
- ax_python_devel_found=no
- PYTHON_VERSION=""
- fi
- fi
- fi
-
- if test $ax_python_devel_found = yes; then
- #
- # Check if you have distutils, else fail
- #
- AC_MSG_CHECKING([for the sysconfig Python package])
- ac_sysconfig_result=`$PYTHON -c "import sysconfig" 2>&1`
- if test $? -eq 0; then
- AC_MSG_RESULT([yes])
- IMPORT_SYSCONFIG="import sysconfig"
- else
- AC_MSG_RESULT([no])
-
- AC_MSG_CHECKING([for the distutils Python package])
- ac_sysconfig_result=`$PYTHON -c "from distutils import sysconfig" 2>&1`
- if test $? -eq 0; then
- AC_MSG_RESULT([yes])
- IMPORT_SYSCONFIG="from distutils import sysconfig"
- else
- AC_MSG_WARN([cannot import Python module "distutils".
-Please check your Python installation. The error was:
-$ac_sysconfig_result])
- if ! $ax_python_devel_optional; then
- AC_MSG_ERROR([Giving up])
- fi
- ax_python_devel_found=no
- PYTHON_VERSION=""
- fi
- fi
- fi
-
- if test $ax_python_devel_found = yes; then
- #
- # Check for Python include path
- #
- AC_MSG_CHECKING([for Python include path])
- if test -z "$PYTHON_CPPFLAGS"; then
- if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
- # sysconfig module has different functions
- python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
- print (sysconfig.get_path ('include'));"`
- plat_python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
- print (sysconfig.get_path ('platinclude'));"`
- else
- # old distutils way
- python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
- print (sysconfig.get_python_inc ());"`
- plat_python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
- print (sysconfig.get_python_inc (plat_specific=1));"`
- fi
- if test -n "${python_path}"; then
- if test "${plat_python_path}" != "${python_path}"; then
- python_path="-I$python_path -I$plat_python_path"
- else
- python_path="-I$python_path"
- fi
- fi
- PYTHON_CPPFLAGS=$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_LIBS"; then
- # (makes two attempts to ensure we've got a version number
- # from the interpreter)
- ac_python_version=`cat<<EOD | $PYTHON -
-
-# join all versioning strings, on some systems
-# major/minor numbers could be in different list elements
-from sysconfig import *
-e = get_config_var('VERSION')
-if e is not None:
- print(e)
-EOD`
-
- if test -z "$ac_python_version"; then
- if test -n "$PYTHON_VERSION"; then
- ac_python_version=$PYTHON_VERSION
- else
- ac_python_version=`$PYTHON -c "import sys; \
- print ("%d.%d" % sys.version_info[[:2]])"`
- fi
- fi
-
- # Make the versioning information available to the compiler
-
- # JW: We don't need it and it interferes with the hack
- # to detect multiple Python versions
- #AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$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_SYSCONFIG
-e = sysconfig.get_config_var('LIBDIR')
-if e is not None:
- print (e)
-EOD`
-
- # Now, for the library:
- ac_python_library=`cat<<EOD | $PYTHON -
-
-$IMPORT_SYSCONFIG
-c = sysconfig.get_config_vars()
-if 'LDVERSION' in c:
- print ('python'+c[['LDVERSION']])
-else:
- print ('python'+c[['VERSION']])
-EOD`
-
- # 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"
- then
- # use the official shared library
- ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
- PYTHON_LIBS="-L$ac_python_libdir -l$ac_python_library"
- else
- # old way: use libpython from python_configdir
- ac_python_libdir=`$PYTHON -c \
- "from sysconfig import get_python_lib as f; \
- import os; \
- print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
- PYTHON_LIBS="-L$ac_python_libdir -lpython$ac_python_version"
- fi
-
- if test -z "PYTHON_LIBS"; then
- AC_MSG_WARN([
- Cannot determine location of your Python DSO. Please check it was installed with
- dynamic libraries enabled, or try setting PYTHON_LIBS by hand.
- ])
- if ! $ax_python_devel_optional; then
- AC_MSG_ERROR([Giving up])
- fi
- ax_python_devel_found=no
- PYTHON_VERSION=""
- fi
- fi
- fi
-
- if test $ax_python_devel_found = yes; then
- AC_MSG_RESULT([$PYTHON_LIBS])
- AC_SUBST([PYTHON_LIBS])
-
- #
- # Check for site packages
- #
- AC_MSG_CHECKING([for Python site-packages path])
- if test -z "$PYTHON_SITE_PKG"; then
- if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
- PYTHON_SITE_PKG=`$PYTHON -c "
-$IMPORT_SYSCONFIG;
-if hasattr(sysconfig, 'get_default_scheme'):
- scheme = sysconfig.get_default_scheme()
-else:
- scheme = sysconfig._get_default_scheme()
-if scheme == 'posix_local':
- # Debian's default scheme installs to /usr/local/ but we want to find headers in /usr/
- scheme = 'posix_prefix'
-prefix = '$prefix'
-if prefix == 'NONE':
- prefix = '$ac_default_prefix'
-sitedir = sysconfig.get_path('purelib', scheme, vars={'base': prefix})
-print(sitedir)"`
- else
- # distutils.sysconfig way
- PYTHON_SITE_PKG=`$PYTHON -c "$IMPORT_SYSCONFIG; \
- print (sysconfig.get_python_lib(0,0));"`
- fi
- fi
- AC_MSG_RESULT([$PYTHON_SITE_PKG])
- AC_SUBST([PYTHON_SITE_PKG])
-
- #
- # Check for platform-specific site packages
- #
- AC_MSG_CHECKING([for Python platform specific site-packages path])
- if test -z "$PYTHON_PLATFORM_SITE_PKG"; then
- if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
- PYTHON_PLATFORM_SITE_PKG=`$PYTHON -c "
-$IMPORT_SYSCONFIG;
-if hasattr(sysconfig, 'get_default_scheme'):
- scheme = sysconfig.get_default_scheme()
-else:
- scheme = sysconfig._get_default_scheme()
-if scheme == 'posix_local':
- # Debian's default scheme installs to /usr/local/ but we want to find headers in /usr/
- scheme = 'posix_prefix'
-prefix = '$prefix'
-if prefix == 'NONE':
- prefix = '$ac_default_prefix'
-sitedir = sysconfig.get_path('platlib', scheme, vars={'platbase': prefix})
-print(sitedir)"`
- else
- # distutils.sysconfig way
- PYTHON_PLATFORM_SITE_PKG=`$PYTHON -c "$IMPORT_SYSCONFIG; \
- print (sysconfig.get_python_lib(1,0));"`
- fi
- fi
- AC_MSG_RESULT([$PYTHON_PLATFORM_SITE_PKG])
- AC_SUBST([PYTHON_PLATFORM_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 "$IMPORT_SYSCONFIG; \
- conf = sysconfig.get_config_var; \
- print (conf('LIBS') + ' ' + conf('SYSLIBS'))"`
- fi
- AC_MSG_RESULT([$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_SYSCONFIG; \
- conf = sysconfig.get_config_var; \
- print (conf('LINKFORSHARED'))"`
- # Hack for macos, it sticks this in here.
- PYTHON_EXTRA_LDFLAGS=`echo $PYTHON_EXTRA_LDFLAGS | sed 's/CoreFoundation.*$/CoreFoundation/'`
- 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_LDFLAGS="$LDFLAGS"
- ac_save_CPPFLAGS="$CPPFLAGS"
- LIBS="$ac_save_LIBS $PYTHON_LIBS $PYTHON_EXTRA_LIBS"
- LDFLAGS="$ac_save_LDFLAGS $PYTHON_EXTRA_LDFLAGS"
- CPPFLAGS="$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="$ac_save_LIBS"
- LDFLAGS="$ac_save_LDFLAGS"
-
- AC_MSG_RESULT([$pythonexists])
-
- if test ! "x$pythonexists" = "xyes"; then
- AC_MSG_WARN([
- Could not link test program to Python. Maybe the main Python library has been
- installed in some non-standard library path. If so, pass it to configure,
- via the LIBS environment variable.
- Example: ./configure LIBS="-L/usr/non-standard-path/python/lib"
- ============================================================================
- ERROR!
- You probably have to install the development version of the Python package
- for your distribution. The exact name of this package varies among them.
- ============================================================================
- ])
- if ! $ax_python_devel_optional; then
- AC_MSG_ERROR([Giving up])
- fi
- ax_python_devel_found=no
- PYTHON_VERSION=""
- fi
- fi
-
- #
- # all done!
- #
-])