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08cd071735
It turns out the ax_python_devel.m4 version check assumes that
("3.X+1.0" >= "3.X.0") is True in Python, which is not when X+1
is 10 or above and X is not. (Also presumably X+1=100 and ...)
So let's remake the check to behave consistently, using the
"packaging" or (if absent) the "distlib" modules.
(Also, update the Github workflows to use the new packages.)
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes: #12073
366 lines
12 KiB
Plaintext
366 lines
12 KiB
Plaintext
# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_python_devel.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_PYTHON_DEVEL([version], [action-if-not-found])
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#
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# DESCRIPTION
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#
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# Note: Defines as a precious variable "PYTHON_VERSION". Don't override it
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# in your configure.ac.
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#
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# Note: this is a slightly modified version of the original AX_PYTHON_DEVEL
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# macro which accepts an additional [action-if-not-found] argument. This
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# allow to detect if Python development is available without aborting the
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# configure phase with an hard error in case it is not.
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#
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# This macro checks for Python and tries to get the include path to
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# 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LIBS) output
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# variables. It also exports $(PYTHON_EXTRA_LIBS) and
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# $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code.
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#
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# You can search for some particular version of Python by passing a
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# parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please
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# note that you *have* to pass also an operator along with the version to
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# match, and pay special attention to the single quotes surrounding the
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# version number. Don't use "PYTHON_VERSION" for this: that environment
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# variable is declared as precious and thus reserved for the end-user.
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#
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# This macro should work for all versions of Python >= 2.1.0. As an end
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# user, you can disable the check for the python version by setting the
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# PYTHON_NOVERSIONCHECK environment variable to something else than the
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# empty string.
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#
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# If you need to use this macro for an older Python version, please
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# contact the authors. We're always open for feedback.
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#
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# LICENSE
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#
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# Copyright (c) 2009 Sebastian Huber <sebastian-huber@web.de>
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# Copyright (c) 2009 Alan W. Irwin
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# Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net>
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# Copyright (c) 2009 Andrew Collier
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# Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org>
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# Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org>
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# Copyright (c) 2013 Daniel Mullner <muellner@math.stanford.edu>
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# Copyright (c) 2018 loli10K <ezomori.nozomu@gmail.com>
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 21
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AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
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AC_DEFUN([AX_PYTHON_DEVEL],[
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#
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# Allow the use of a (user set) custom python version
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#
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AC_ARG_VAR([PYTHON_VERSION],[The installed Python
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version to use, for example '2.3'. This string
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will be appended to the Python interpreter
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canonical name.])
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AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
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if test -z "$PYTHON"; then
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m4_ifvaln([$2],[$2],[
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AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path])
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PYTHON_VERSION=""
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])
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fi
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#
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# Check for a version of Python >= 2.1.0
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#
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AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
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ac_supports_python_ver=`cat<<EOD | $PYTHON -
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from __future__ import print_function;
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import sys;
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try:
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from packaging import version;
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except ImportError:
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from distlib import version;
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ver = sys.version.split ()[[0]];
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(tst_cmp, tst_ver) = ">= '2.1.0'".split ();
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tst_ver = tst_ver.strip ("'");
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eval ("print (version.LegacyVersion (ver)"+ tst_cmp +"version.LegacyVersion (tst_ver))")
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EOD`
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if test "$ac_supports_python_ver" != "True"; then
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if test -z "$PYTHON_NOVERSIONCHECK"; then
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AC_MSG_RESULT([no])
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m4_ifvaln([$2],[$2],[
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AC_MSG_FAILURE([
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This version of the AC@&t@_PYTHON_DEVEL macro
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doesn't work properly with versions of Python before
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2.1.0. You may need to re-run configure, setting the
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variables PYTHON_CPPFLAGS, PYTHON_LIBS, PYTHON_SITE_PKG,
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PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
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Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
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to something else than an empty string.
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])
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])
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else
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AC_MSG_RESULT([skip at user request])
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fi
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else
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AC_MSG_RESULT([yes])
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fi
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#
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# if the macro parameter ``version'' is set, honour it
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#
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if test -n "$1"; then
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AC_MSG_CHECKING([for a version of Python $1])
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# Why the strip ()? Because if we don't, version.parse
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# will, for example, report 3.10.0 >= '3.11.0'
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ac_supports_python_ver=`cat<<EOD | $PYTHON -
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from __future__ import print_function;
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import sys;
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try:
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from packaging import version;
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except ImportError:
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from distlib import version;
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ver = sys.version.split ()[[0]];
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(tst_cmp, tst_ver) = "$1".split ();
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tst_ver = tst_ver.strip ("'");
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eval ("print (version.LegacyVersion (ver)"+ tst_cmp +"version.LegacyVersion (tst_ver))")
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EOD`
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if test "$ac_supports_python_ver" = "True"; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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m4_ifvaln([$2],[$2],[
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AC_MSG_ERROR([this package requires Python $1.
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If you have it installed, but it isn't the default Python
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interpreter in your system path, please pass the PYTHON_VERSION
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variable to configure. See ``configure --help'' for reference.
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])
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PYTHON_VERSION=""
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])
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fi
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fi
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#
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# Check if you have distutils, else fail
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#
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AC_MSG_CHECKING([for the distutils Python package])
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if ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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m4_ifvaln([$2],[$2],[
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AC_MSG_ERROR([cannot import Python module "distutils".
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Please check your Python installation. The error was:
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$ac_distutils_result])
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PYTHON_VERSION=""
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])
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fi
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#
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# Check for Python include path
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#
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AC_MSG_CHECKING([for Python include path])
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if test -z "$PYTHON_CPPFLAGS"; then
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python_path=`$PYTHON -c "import distutils.sysconfig; \
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print (distutils.sysconfig.get_python_inc ());"`
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plat_python_path=`$PYTHON -c "import distutils.sysconfig; \
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print (distutils.sysconfig.get_python_inc (plat_specific=1));"`
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if test -n "${python_path}"; then
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if test "${plat_python_path}" != "${python_path}"; then
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python_path="-I$python_path -I$plat_python_path"
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else
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python_path="-I$python_path"
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fi
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fi
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PYTHON_CPPFLAGS=$python_path
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fi
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AC_MSG_RESULT([$PYTHON_CPPFLAGS])
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AC_SUBST([PYTHON_CPPFLAGS])
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#
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# Check for Python library path
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#
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AC_MSG_CHECKING([for Python library path])
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if test -z "$PYTHON_LIBS"; then
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# (makes two attempts to ensure we've got a version number
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# from the interpreter)
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ac_python_version=`cat<<EOD | $PYTHON -
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# join all versioning strings, on some systems
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# major/minor numbers could be in different list elements
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from distutils.sysconfig import *
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e = get_config_var('VERSION')
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if e is not None:
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print(e)
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EOD`
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if test -z "$ac_python_version"; then
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if test -n "$PYTHON_VERSION"; then
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ac_python_version=$PYTHON_VERSION
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else
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ac_python_version=`$PYTHON -c "import sys; \
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print (sys.version[[:3]])"`
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fi
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fi
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# Make the versioning information available to the compiler
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AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
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[If available, contains the Python version number currently in use.])
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# First, the library directory:
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ac_python_libdir=`cat<<EOD | $PYTHON -
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# There should be only one
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import distutils.sysconfig
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e = distutils.sysconfig.get_config_var('LIBDIR')
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if e is not None:
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print (e)
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EOD`
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# Now, for the library:
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ac_python_library=`cat<<EOD | $PYTHON -
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import distutils.sysconfig
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c = distutils.sysconfig.get_config_vars()
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if 'LDVERSION' in c:
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print ('python'+c[['LDVERSION']])
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else:
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print ('python'+c[['VERSION']])
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EOD`
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# This small piece shamelessly adapted from PostgreSQL python macro;
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# credits goes to momjian, I think. I'd like to put the right name
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# in the credits, if someone can point me in the right direction... ?
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#
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if test -n "$ac_python_libdir" -a -n "$ac_python_library"
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then
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# use the official shared library
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ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
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PYTHON_LIBS="-L$ac_python_libdir -l$ac_python_library"
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else
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# old way: use libpython from python_configdir
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ac_python_libdir=`$PYTHON -c \
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"from distutils.sysconfig import get_python_lib as f; \
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import os; \
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print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
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PYTHON_LIBS="-L$ac_python_libdir -lpython$ac_python_version"
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fi
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if test -z "PYTHON_LIBS"; then
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m4_ifvaln([$2],[$2],[
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AC_MSG_ERROR([
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Cannot determine location of your Python DSO. Please check it was installed with
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dynamic libraries enabled, or try setting PYTHON_LIBS by hand.
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])
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])
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fi
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fi
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AC_MSG_RESULT([$PYTHON_LIBS])
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AC_SUBST([PYTHON_LIBS])
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#
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# Check for site packages
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#
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AC_MSG_CHECKING([for Python site-packages path])
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if test -z "$PYTHON_SITE_PKG"; then
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PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
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print (distutils.sysconfig.get_python_lib(0,0));"`
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fi
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AC_MSG_RESULT([$PYTHON_SITE_PKG])
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AC_SUBST([PYTHON_SITE_PKG])
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#
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# libraries which must be linked in when embedding
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#
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AC_MSG_CHECKING(python extra libraries)
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if test -z "$PYTHON_EXTRA_LIBS"; then
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PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
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conf = distutils.sysconfig.get_config_var; \
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print (conf('LIBS') + ' ' + conf('SYSLIBS'))"`
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fi
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AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
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AC_SUBST(PYTHON_EXTRA_LIBS)
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#
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# linking flags needed when embedding
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#
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AC_MSG_CHECKING(python extra linking flags)
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if test -z "$PYTHON_EXTRA_LDFLAGS"; then
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PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
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conf = distutils.sysconfig.get_config_var; \
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print (conf('LINKFORSHARED'))"`
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fi
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AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
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AC_SUBST(PYTHON_EXTRA_LDFLAGS)
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#
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# final check to see if everything compiles alright
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#
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AC_MSG_CHECKING([consistency of all components of python development environment])
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# save current global flags
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ac_save_LIBS="$LIBS"
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ac_save_LDFLAGS="$LDFLAGS"
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ac_save_CPPFLAGS="$CPPFLAGS"
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LIBS="$ac_save_LIBS $PYTHON_LIBS $PYTHON_EXTRA_LIBS $PYTHON_EXTRA_LIBS"
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LDFLAGS="$ac_save_LDFLAGS $PYTHON_EXTRA_LDFLAGS"
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CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
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AC_LANG_PUSH([C])
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AC_LINK_IFELSE([
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AC_LANG_PROGRAM([[#include <Python.h>]],
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[[Py_Initialize();]])
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],[pythonexists=yes],[pythonexists=no])
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AC_LANG_POP([C])
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# turn back to default flags
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CPPFLAGS="$ac_save_CPPFLAGS"
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LIBS="$ac_save_LIBS"
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LDFLAGS="$ac_save_LDFLAGS"
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AC_MSG_RESULT([$pythonexists])
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if test ! "x$pythonexists" = "xyes"; then
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m4_ifvaln([$2],[$2],[
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AC_MSG_FAILURE([
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Could not link test program to Python. Maybe the main Python library has been
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installed in some non-standard library path. If so, pass it to configure,
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via the LIBS environment variable.
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Example: ./configure LIBS="-L/usr/non-standard-path/python/lib"
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============================================================================
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ERROR!
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You probably have to install the development version of the Python package
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for your distribution. The exact name of this package varies among them.
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============================================================================
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])
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PYTHON_VERSION=""
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])
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fi
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#
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# all done!
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#
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])
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