zfs/config/ax_python_devel.m4

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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 <sebastian-huber@web.de>
# Copyright (c) 2009 Alan W. Irwin
# Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net>
# Copyright (c) 2009 Andrew Collier
# Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org>
# Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org>
# Copyright (c) 2013 Daniel Mullner <muellner@math.stanford.edu>
#
# 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=`$PYTHON -c "import sys; \
print ("%d.%d" % sys.version_info[[:2]])"`
fi
fi
# Make the versioning information available to the compiler
AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$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!
#
])