cc1f2b5acb
* m4/ax_python_devel.m4: Do not emit 'HAVE_PYTHON'.
--
This reapplies the changes made with 5189c08 that are still needed for
detecting multiple Python versions.
472 lines
16 KiB
Plaintext
472 lines
16 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[,optional]])
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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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# 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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# By default this will fail if it does not detect a development version of
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# python. If you want it to continue, set optional to true, like
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# AX_PYTHON_DEVEL([], [true]). The ax_python_devel_found variable will be
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# "no" if it fails.
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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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#
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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 36
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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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# Get whether it's optional
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if test -z "$2"; then
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ax_python_devel_optional=false
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else
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ax_python_devel_optional=$2
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fi
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ax_python_devel_found=yes
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#
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# Allow the use of a (user set) custom python version
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#
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AC_ARG_VAR([PYTHON_VERSION],[The installed Python
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version to use, for example '2.3'. This string
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will be appended to the Python interpreter
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canonical name.])
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AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
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if test -z "$PYTHON"; then
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AC_MSG_WARN([Cannot find python$PYTHON_VERSION in your system path])
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if ! $ax_python_devel_optional; then
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AC_MSG_ERROR([Giving up, python development not available])
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fi
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ax_python_devel_found=no
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PYTHON_VERSION=""
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fi
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if test $ax_python_devel_found = yes; then
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#
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# Check for a version of Python >= 2.1.0
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#
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AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
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ac_supports_python_ver=`$PYTHON -c "import sys; \
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ver = sys.version.split ()[[0]]; \
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print (ver >= '2.1.0')"`
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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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AC_MSG_WARN([
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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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if ! $ax_python_devel_optional; then
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AC_MSG_FAILURE([Giving up])
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fi
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ax_python_devel_found=no
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PYTHON_VERSION=""
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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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fi
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if test $ax_python_devel_found = yes; then
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#
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# If the macro parameter ``version'' is set, honour it.
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# A Python shim class, VPy, is used to implement correct version comparisons via
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# string expressions, since e.g. a naive textual ">= 2.7.3" won't work for
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# Python 2.7.10 (the ".1" being evaluated as less than ".3").
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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 $1])
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cat << EOF > ax_python_devel_vpy.py
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class VPy:
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def vtup(self, s):
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return tuple(map(int, s.strip().replace("rc", ".").split(".")))
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def __init__(self):
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import sys
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self.vpy = tuple(sys.version_info)[[:3]]
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def __eq__(self, s):
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return self.vpy == self.vtup(s)
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def __ne__(self, s):
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return self.vpy != self.vtup(s)
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def __lt__(self, s):
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return self.vpy < self.vtup(s)
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def __gt__(self, s):
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return self.vpy > self.vtup(s)
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def __le__(self, s):
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return self.vpy <= self.vtup(s)
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def __ge__(self, s):
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return self.vpy >= self.vtup(s)
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EOF
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ac_supports_python_ver=`$PYTHON -c "import ax_python_devel_vpy; \
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ver = ax_python_devel_vpy.VPy(); \
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print (ver $1)"`
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rm -rf ax_python_devel_vpy*.py* __pycache__/ax_python_devel_vpy*.py*
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if test "$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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AC_MSG_WARN([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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if ! $ax_python_devel_optional; then
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AC_MSG_ERROR([Giving up])
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fi
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ax_python_devel_found=no
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PYTHON_VERSION=""
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fi
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fi
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fi
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if test $ax_python_devel_found = yes; then
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#
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# Check if you have distutils, else fail
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#
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AC_MSG_CHECKING([for the sysconfig Python package])
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ac_sysconfig_result=`$PYTHON -c "import sysconfig" 2>&1`
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if test $? -eq 0; then
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AC_MSG_RESULT([yes])
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IMPORT_SYSCONFIG="import sysconfig"
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else
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AC_MSG_RESULT([no])
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AC_MSG_CHECKING([for the distutils Python package])
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ac_sysconfig_result=`$PYTHON -c "from distutils import sysconfig" 2>&1`
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if test $? -eq 0; then
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AC_MSG_RESULT([yes])
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IMPORT_SYSCONFIG="from distutils import sysconfig"
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else
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AC_MSG_WARN([cannot import Python module "distutils".
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Please check your Python installation. The error was:
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$ac_sysconfig_result])
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if ! $ax_python_devel_optional; then
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AC_MSG_ERROR([Giving up])
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fi
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ax_python_devel_found=no
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PYTHON_VERSION=""
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fi
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fi
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fi
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if test $ax_python_devel_found = yes; then
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#
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# Check for Python include path
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#
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AC_MSG_CHECKING([for Python include path])
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if test -z "$PYTHON_CPPFLAGS"; then
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if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
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# sysconfig module has different functions
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python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
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print (sysconfig.get_path ('include'));"`
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plat_python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
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print (sysconfig.get_path ('platinclude'));"`
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else
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# old distutils way
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python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
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print (sysconfig.get_python_inc ());"`
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plat_python_path=`$PYTHON -c "$IMPORT_SYSCONFIG; \
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print (sysconfig.get_python_inc (plat_specific=1));"`
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fi
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if test -n "${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 | $PYTHON -
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# join all versioning strings, on some systems
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# major/minor numbers could be in different list elements
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from sysconfig import *
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e = get_config_var('VERSION')
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if e is not None:
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print(e)
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EOD`
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if test -z "$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=`$PYTHON -c "import sys; \
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print ("%d.%d" % sys.version_info[[:2]])"`
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fi
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fi
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# Make the versioning information available to the compiler
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# JW: We don't need it and it interferes with the hack
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# to detect multiple Python versions
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#AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$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_SYSCONFIG
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e = 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_SYSCONFIG
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c = 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 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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AC_MSG_WARN([
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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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if ! $ax_python_devel_optional; then
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AC_MSG_ERROR([Giving up])
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fi
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ax_python_devel_found=no
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PYTHON_VERSION=""
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fi
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fi
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fi
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if test $ax_python_devel_found = yes; then
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AC_MSG_RESULT([$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 "$PYTHON_SITE_PKG"; then
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if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
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PYTHON_SITE_PKG=`$PYTHON -c "
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$IMPORT_SYSCONFIG;
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if hasattr(sysconfig, 'get_default_scheme'):
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scheme = sysconfig.get_default_scheme()
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else:
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scheme = sysconfig._get_default_scheme()
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if scheme == 'posix_local':
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# Debian's default scheme installs to /usr/local/ but we want to find headers in /usr/
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scheme = 'posix_prefix'
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prefix = '$prefix'
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if prefix == 'NONE':
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prefix = '$ac_default_prefix'
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sitedir = sysconfig.get_path('purelib', scheme, vars={'base': prefix})
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print(sitedir)"`
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else
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# distutils.sysconfig way
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PYTHON_SITE_PKG=`$PYTHON -c "$IMPORT_SYSCONFIG; \
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print (sysconfig.get_python_lib(0,0));"`
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fi
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fi
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AC_MSG_RESULT([$PYTHON_SITE_PKG])
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AC_SUBST([PYTHON_SITE_PKG])
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#
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# Check for platform-specific site packages
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#
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AC_MSG_CHECKING([for Python platform specific site-packages path])
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if test -z "$PYTHON_PLATFORM_SITE_PKG"; then
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if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
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PYTHON_PLATFORM_SITE_PKG=`$PYTHON -c "
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$IMPORT_SYSCONFIG;
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if hasattr(sysconfig, 'get_default_scheme'):
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scheme = sysconfig.get_default_scheme()
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else:
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scheme = sysconfig._get_default_scheme()
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if scheme == 'posix_local':
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# Debian's default scheme installs to /usr/local/ but we want to find headers in /usr/
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scheme = 'posix_prefix'
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prefix = '$prefix'
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if prefix == 'NONE':
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prefix = '$ac_default_prefix'
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sitedir = sysconfig.get_path('platlib', scheme, vars={'platbase': prefix})
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print(sitedir)"`
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else
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# distutils.sysconfig way
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PYTHON_PLATFORM_SITE_PKG=`$PYTHON -c "$IMPORT_SYSCONFIG; \
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print (sysconfig.get_python_lib(1,0));"`
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fi
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fi
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AC_MSG_RESULT([$PYTHON_PLATFORM_SITE_PKG])
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AC_SUBST([PYTHON_PLATFORM_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 "$IMPORT_SYSCONFIG; \
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conf = sysconfig.get_config_var; \
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print (conf('LIBS') + ' ' + conf('SYSLIBS'))"`
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fi
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AC_MSG_RESULT([$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_SYSCONFIG; \
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conf = sysconfig.get_config_var; \
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print (conf('LINKFORSHARED'))"`
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# Hack for macos, it sticks this in here.
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PYTHON_EXTRA_LDFLAGS=`echo $PYTHON_EXTRA_LDFLAGS | sed 's/CoreFoundation.*$/CoreFoundation/'`
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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 $PYTHON_EXTRA_LIBS"
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LDFLAGS="$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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AC_MSG_WARN([
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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
|
|
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!
|
|
#
|
|
])
|