1
# ===========================================================================
2
# http://www.nongnu.org/autoconf-archive/ax_python_devel.html
3
# ===========================================================================
7
# AX_PYTHON_DEVEL([version])
11
# Note: Defines as a precious variable "PYTHON_VERSION". Don't override it
12
# in your configure.ac.
14
# This macro checks for Python and tries to get the include path to
15
# 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS)
16
# output variables. It also exports $(PYTHON_EXTRA_LIBS) and
17
# $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code.
19
# You can search for some particular version of Python by passing a
20
# parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please
21
# note that you *have* to pass also an operator along with the version to
22
# match, and pay special attention to the single quotes surrounding the
23
# version number. Don't use "PYTHON_VERSION" for this: that environment
24
# variable is declared as precious and thus reserved for the end-user.
26
# This macro should work for all versions of Python >= 2.1.0. As an end
27
# user, you can disable the check for the python version by setting the
28
# PYTHON_NOVERSIONCHECK environment variable to something else than the
31
# If you need to use this macro for an older Python version, please
32
# contact the authors. We're always open for feedback.
36
# Copyright (c) 2009 Sebastian Huber <sebastian-huber@web.de>
37
# Copyright (c) 2009 Alan W. Irwin <irwin@beluga.phys.uvic.ca>
38
# Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net>
39
# Copyright (c) 2009 Andrew Collier <colliera@ukzn.ac.za>
40
# Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org>
41
# Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org>
43
# This program is free software: you can redistribute it and/or modify it
44
# under the terms of the GNU General Public License as published by the
45
# Free Software Foundation, either version 3 of the License, or (at your
46
# option) any later version.
48
# This program is distributed in the hope that it will be useful, but
49
# WITHOUT ANY WARRANTY; without even the implied warranty of
50
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
51
# Public License for more details.
53
# You should have received a copy of the GNU General Public License along
54
# with this program. If not, see <http://www.gnu.org/licenses/>.
56
# As a special exception, the respective Autoconf Macro's copyright owner
57
# gives unlimited permission to copy, distribute and modify the configure
58
# scripts that are the output of Autoconf when processing the Macro. You
59
# need not follow the terms of the GNU General Public License when using
60
# or distributing such scripts, even though portions of the text of the
61
# Macro appear in them. The GNU General Public License (GPL) does govern
62
# all other use of the material that constitutes the Autoconf Macro.
64
# This special exception to the GPL applies to versions of the Autoconf
65
# Macro released by the Autoconf Archive. When you make and distribute a
66
# modified version of the Autoconf Macro, you may extend this special
67
# exception to the GPL to apply to your modified version as well.
69
AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
70
AC_DEFUN([AX_PYTHON_DEVEL],[
72
# Allow the use of a (user set) custom python version
74
AC_ARG_VAR([PYTHON_VERSION],[The installed Python
75
version to use, for example '2.3'. This string
76
will be appended to the Python interpreter
79
AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
80
if test -z "$PYTHON"; then
81
AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path])
86
# Check for a version of Python >= 2.1.0
88
AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
89
ac_supports_python_ver=`$PYTHON -c "import sys; \
90
ver = sys.version.split ()[[0]]; \
91
print (ver >= '2.1.0')"`
92
if test "$ac_supports_python_ver" != "True"; then
93
if test -z "$PYTHON_NOVERSIONCHECK"; then
96
This version of the AC@&t@_PYTHON_DEVEL macro
97
doesn't work properly with versions of Python before
98
2.1.0. You may need to re-run configure, setting the
99
variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG,
100
PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
101
Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
102
to something else than an empty string.
105
AC_MSG_RESULT([skip at user request])
112
# if the macro parameter ``version'' is set, honour it
114
if test -n "$1"; then
115
AC_MSG_CHECKING([for a version of Python $1])
116
ac_supports_python_ver=`$PYTHON -c "import sys; \
117
ver = sys.version.split ()[[0]]; \
119
if test "$ac_supports_python_ver" = "True"; then
123
AC_MSG_ERROR([this package requires Python $1.
124
If you have it installed, but it isn't the default Python
125
interpreter in your system path, please pass the PYTHON_VERSION
126
variable to configure. See ``configure --help'' for reference.
133
# Check if you have distutils, else fail
135
AC_MSG_CHECKING([for the distutils Python package])
136
ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`
137
if test -z "$ac_distutils_result"; then
141
AC_MSG_ERROR([cannot import Python module "distutils".
142
Please check your Python installation. The error was:
143
$ac_distutils_result])
148
# Check for Python include path
150
AC_MSG_CHECKING([for Python include path])
151
if test -z "$PYTHON_CPPFLAGS"; then
152
python_path=`$PYTHON -c "import distutils.sysconfig; \
153
print (distutils.sysconfig.get_python_inc ());"`
154
if test -n "${python_path}"; then
155
python_path="-I$python_path"
157
PYTHON_CPPFLAGS=$python_path
159
AC_MSG_RESULT([$PYTHON_CPPFLAGS])
160
AC_SUBST([PYTHON_CPPFLAGS])
163
# Check for Python library path
165
AC_MSG_CHECKING([for Python library path])
166
if test -z "$PYTHON_LDFLAGS"; then
167
# (makes two attempts to ensure we've got a version number
168
# from the interpreter)
169
ac_python_version=`cat<<EOD | $PYTHON -
171
# join all versioning strings, on some systems
172
# major/minor numbers could be in different list elements
173
from distutils.sysconfig import *
175
for e in get_config_vars ('VERSION'):
181
if test -z "$ac_python_version"; then
182
if test -n "$PYTHON_VERSION"; then
183
ac_python_version=$PYTHON_VERSION
185
ac_python_version=`$PYTHON -c "import sys; \
186
print (sys.version[[:3]])"`
190
# Make the versioning information available to the compiler
191
AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
192
[If available, contains the Python version number currently in use.])
194
# First, the library directory:
195
ac_python_libdir=`cat<<EOD | $PYTHON -
197
# There should be only one
198
import distutils.sysconfig
199
for e in distutils.sysconfig.get_config_vars ('LIBDIR'):
205
# Before checking for libpythonX.Y, we need to know
206
# the extension the OS we're on uses for libraries
207
# (we take the first one, if there's more than one fix me!):
208
ac_python_soext=`$PYTHON -c \
209
"import distutils.sysconfig; \
210
print (distutils.sysconfig.get_config_vars('SO')[[0]])"`
212
# Now, for the library:
213
ac_python_soname=`$PYTHON -c \
214
"import distutils.sysconfig; \
215
print (distutils.sysconfig.get_config_vars('LDLIBRARY')[[0]])"`
217
# Strip away extension from the end to canonicalize its name:
218
ac_python_library=`echo "$ac_python_soname" | sed "s/${ac_python_soext}$//"`
220
# This small piece shamelessly adapted from PostgreSQL python macro;
221
# credits goes to momjian, I think. I'd like to put the right name
222
# in the credits, if someone can point me in the right direction... ?
224
if test -n "$ac_python_libdir" -a -n "$ac_python_library" \
225
-a x"$ac_python_library" != x"$ac_python_soname"
227
# use the official shared library
228
ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
229
PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library"
231
# old way: use libpython from python_configdir
232
ac_python_libdir=`$PYTHON -c \
233
"from distutils.sysconfig import get_python_lib as f; \
235
print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
236
PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version"
239
if test -z "PYTHON_LDFLAGS"; then
241
Cannot determine location of your Python DSO. Please check it was installed with
242
dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand.
246
AC_MSG_RESULT([$PYTHON_LDFLAGS])
247
AC_SUBST([PYTHON_LDFLAGS])
250
# Check for site packages
252
AC_MSG_CHECKING([for Python site-packages path])
253
if test -z "$PYTHON_SITE_PKG"; then
254
PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
255
print (distutils.sysconfig.get_python_lib(0,0));"`
257
AC_MSG_RESULT([$PYTHON_SITE_PKG])
258
AC_SUBST([PYTHON_SITE_PKG])
261
# libraries which must be linked in when embedding
263
AC_MSG_CHECKING(python extra libraries)
264
if test -z "$PYTHON_EXTRA_LIBS"; then
265
PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
266
conf = distutils.sysconfig.get_config_var; \
267
print (conf('LOCALMODLIBS') + ' ' + conf('LIBS'))"`
269
AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
270
AC_SUBST(PYTHON_EXTRA_LIBS)
273
# linking flags needed when embedding
275
AC_MSG_CHECKING(python extra linking flags)
276
if test -z "$PYTHON_EXTRA_LDFLAGS"; then
277
PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
278
conf = distutils.sysconfig.get_config_var; \
279
print (conf('LINKFORSHARED'))"`
281
AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
282
AC_SUBST(PYTHON_EXTRA_LDFLAGS)
285
# final check to see if everything compiles alright
287
AC_MSG_CHECKING([consistency of all components of python development environment])
288
# save current global flags
290
ac_save_CPPFLAGS="$CPPFLAGS"
291
LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS"
292
CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
295
AC_LANG_PROGRAM([[#include <Python.h>]],
296
[[Py_Initialize();]])
297
],[pythonexists=yes],[pythonexists=no])
299
# turn back to default flags
300
CPPFLAGS="$ac_save_CPPFLAGS"
303
AC_MSG_RESULT([$pythonexists])
305
if test ! "x$pythonexists" = "xyes"; then
307
Could not link test program to Python. Maybe the main Python library has been
308
installed in some non-standard library path. If so, pass it to configure,
309
via the LDFLAGS environment variable.
310
Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
311
============================================================================
313
You probably have to install the development version of the Python package
314
for your distribution. The exact name of this package varies among them.
315
============================================================================
added
removed
ax_python_devel.m4
