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build: Update Python autoconf macro

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* configure.ac: Call AX_PYTHON_DEVEL with new "optional" argument.
* m4/ax_python_devel.m4: Replace with current version from the autoconf
archive.
--

The new "optional" argument allows us to leave out one of our custom
changes.
This commit is contained in:
Ingo Klöcker 2024-01-16 09:53:39 +01:00
parent 18388f93ab
commit e3ae88267f
No known key found for this signature in database
GPG Key ID: F5A5D1692277A1E9
2 changed files with 264 additions and 122 deletions
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2
configure.ac
View File

@ -607,7 +607,7 @@ if test "$found_py" = "1"; then
unset am_cv_python_pythondir unset am_cv_python_pythondir
unset am_cv_python_pyexecdir unset am_cv_python_pyexecdir
AM_PATH_PYTHON(mym4pythonver, [ AM_PATH_PYTHON(mym4pythonver, [
AX_PYTHON_DEVEL AX_PYTHON_DEVEL([], [true])
if test "$PYTHON_VERSION"; then if test "$PYTHON_VERSION"; then
PYTHONS="$(echo $PYTHONS $PYTHON)" PYTHONS="$(echo $PYTHONS $PYTHON)"
PYTHON_VERSIONS="$(echo $PYTHON_VERSIONS $PYTHON_VERSION)" PYTHON_VERSIONS="$(echo $PYTHON_VERSIONS $PYTHON_VERSION)"

384
m4/ax_python_devel.m4
View File

@ -1,10 +1,10 @@
# =========================================================================== # ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_python_devel.html # https://www.gnu.org/software/autoconf-archive/ax_python_devel.html
# =========================================================================== # ===========================================================================
# #
# SYNOPSIS # SYNOPSIS
# #
# AX_PYTHON_DEVEL([version]) # AX_PYTHON_DEVEL([version[,optional]])
# #
# DESCRIPTION # DESCRIPTION
# #
@ -12,8 +12,8 @@
# in your configure.ac. # in your configure.ac.
# #
# This macro checks for Python and tries to get the include path to # This macro checks for Python and tries to get the include path to
# 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS) # 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LIBS) output
# output variables. It also exports $(PYTHON_EXTRA_LIBS) and # variables. It also exports $(PYTHON_EXTRA_LIBS) and
# $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code. # $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code.
# #
# You can search for some particular version of Python by passing a # You can search for some particular version of Python by passing a
@ -23,6 +23,11 @@
# version number. Don't use "PYTHON_VERSION" for this: that environment # version number. Don't use "PYTHON_VERSION" for this: that environment
# variable is declared as precious and thus reserved for the end-user. # 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 # 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 # user, you can disable the check for the python version by setting the
# PYTHON_NOVERSIONCHECK environment variable to something else than the # PYTHON_NOVERSIONCHECK environment variable to something else than the
@ -67,10 +72,18 @@
# modified version of the Autoconf Macro, you may extend this special # modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well. # exception to the GPL to apply to your modified version as well.
#serial 17 #serial 36
AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL]) AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
AC_DEFUN([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=$2
fi
ax_python_devel_found=yes
# #
# Allow the use of a (user set) custom python version # Allow the use of a (user set) custom python version
# #
@ -81,81 +94,147 @@ AC_DEFUN([AX_PYTHON_DEVEL],[
AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]]) AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
if test -z "$PYTHON"; then if test -z "$PYTHON"; then
AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path]) 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="" PYTHON_VERSION=""
fi fi
# if test $ax_python_devel_found = yes; then
# Check for a version of Python >= 2.1.0 #
# # Check for a version of Python >= 2.1.0
AC_MSG_CHECKING([for a version of Python >= '2.1.0']) #
ac_supports_python_ver=`$PYTHON -c "import sys; \ AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
ac_supports_python_ver=`$PYTHON -c "import sys; \
ver = sys.version.split ()[[0]]; \ ver = sys.version.split ()[[0]]; \
print (ver >= '2.1.0')"` print (ver >= '2.1.0')"`
if test "$ac_supports_python_ver" != "True"; then if test "$ac_supports_python_ver" != "True"; then
if test -z "$PYTHON_NOVERSIONCHECK"; then if test -z "$PYTHON_NOVERSIONCHECK"; then
AC_MSG_RESULT([no]) AC_MSG_RESULT([no])
AC_MSG_FAILURE([ AC_MSG_WARN([
This version of the AC@&t@_PYTHON_DEVEL macro This version of the AC@&t@_PYTHON_DEVEL macro
doesn't work properly with versions of Python before doesn't work properly with versions of Python before
2.1.0. You may need to re-run configure, setting the 2.1.0. You may need to re-run configure, setting the
variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG, variables PYTHON_CPPFLAGS, PYTHON_LIBS, PYTHON_SITE_PKG,
PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand. PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
Moreover, to disable this check, set PYTHON_NOVERSIONCHECK Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
to something else than an empty string. 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 else
AC_MSG_RESULT([skip at user request]) AC_MSG_RESULT([skip at user request])
fi fi
else else
AC_MSG_RESULT([yes]) AC_MSG_RESULT([yes])
fi
fi fi
# if test $ax_python_devel_found = yes; then
# if the macro parameter ``version'' is set, honour it #
# # If the macro parameter ``version'' is set, honour it.
if test -n "$1"; then # 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]) AC_MSG_CHECKING([for a version of Python $1])
ac_supports_python_ver=`$PYTHON -c "import sys; \ cat << EOF > ax_python_devel_vpy.py
ver = sys.version.split ()[[0]]; \ 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)"` print (ver $1)"`
rm -rf ax_python_devel_vpy*.py* __pycache__/ax_python_devel_vpy*.py*
if test "$ac_supports_python_ver" = "True"; then if test "$ac_supports_python_ver" = "True"; then
AC_MSG_RESULT([yes]) AC_MSG_RESULT([yes])
else else
AC_MSG_RESULT([no]) AC_MSG_RESULT([no])
AC_MSG_ERROR([this package requires Python $1. AC_MSG_WARN([this package requires Python $1.
If you have it installed, but it isn't the default Python If you have it installed, but it isn't the default Python
interpreter in your system path, please pass the PYTHON_VERSION interpreter in your system path, please pass the PYTHON_VERSION
variable to configure. See ``configure --help'' for reference. 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="" PYTHON_VERSION=""
fi fi
fi
fi fi
# if test $ax_python_devel_found = yes; then
# Check if you have distutils, else fail #
# # Check if you have distutils, else fail
AC_MSG_CHECKING([for the distutils Python package]) #
ac_distutils_result=`$PYTHON -c "import distutils" 2>&1` AC_MSG_CHECKING([for the sysconfig Python package])
if test -z "$ac_distutils_result"; then ac_sysconfig_result=`$PYTHON -c "import sysconfig" 2>&1`
if test $? -eq 0; then
AC_MSG_RESULT([yes]) AC_MSG_RESULT([yes])
else IMPORT_SYSCONFIG="import sysconfig"
else
AC_MSG_RESULT([no]) AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot import Python module "distutils".
AC_MSG_CHECKING([for the distutils Python package])
ac_sysconfig_result=`$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: Please check your Python installation. The error was:
$ac_distutils_result]) $ac_sysconfig_result])
PYTHON_VERSION="" if ! $ax_python_devel_optional; then
AC_MSG_ERROR([Giving up])
fi
ax_python_devel_found=no
PYTHON_VERSION=""
fi
fi
fi fi
# if test $ax_python_devel_found = yes; then
# Check for Python include path #
# # Check for Python include path
AC_MSG_CHECKING([for Python include path]) #
if test -z "$PYTHON_CPPFLAGS"; then AC_MSG_CHECKING([for Python include path])
python_path=`$PYTHON -c "import distutils.sysconfig; \ if test -z "$PYTHON_CPPFLAGS"; then
print (distutils.sysconfig.get_python_inc ());"` if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
plat_python_path=`$PYTHON -c "import distutils.sysconfig; \ # sysconfig module has different functions
print (distutils.sysconfig.get_python_inc (plat_specific=1));"` 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 "${python_path}"; then if test -n "${python_path}"; then
if test "${plat_python_path}" != "${python_path}"; then if test "${plat_python_path}" != "${python_path}"; then
python_path="-I$python_path -I$plat_python_path" python_path="-I$python_path -I$plat_python_path"
@ -164,22 +243,22 @@ $ac_distutils_result])
fi fi
fi fi
PYTHON_CPPFLAGS=$python_path PYTHON_CPPFLAGS=$python_path
fi fi
AC_MSG_RESULT([$PYTHON_CPPFLAGS]) AC_MSG_RESULT([$PYTHON_CPPFLAGS])
AC_SUBST([PYTHON_CPPFLAGS]) AC_SUBST([PYTHON_CPPFLAGS])
# #
# Check for Python library path # Check for Python library path
# #
AC_MSG_CHECKING([for Python library path]) AC_MSG_CHECKING([for Python library path])
if test -z "$PYTHON_LDFLAGS"; then if test -z "$PYTHON_LIBS"; then
# (makes two attempts to ensure we've got a version number # (makes two attempts to ensure we've got a version number
# from the interpreter) # from the interpreter)
ac_python_version=`cat<<EOD | $PYTHON - ac_python_version=`cat<<EOD | $PYTHON -
# join all versioning strings, on some systems # join all versioning strings, on some systems
# major/minor numbers could be in different list elements # major/minor numbers could be in different list elements
from distutils.sysconfig import * from sysconfig import *
e = get_config_var('VERSION') e = get_config_var('VERSION')
if e is not None: if e is not None:
print(e) print(e)
@ -190,23 +269,20 @@ EOD`
ac_python_version=$PYTHON_VERSION ac_python_version=$PYTHON_VERSION
else else
ac_python_version=`$PYTHON -c "import sys; \ ac_python_version=`$PYTHON -c "import sys; \
print (sys.version[[:3]])"` print ("%d.%d" % sys.version_info[[:2]])"`
fi fi
fi fi
# Make the versioning information available to the compiler # Make the versioning information available to the compiler
AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
# JW: We don't need it and it interferes with the hack [If available, contains the Python version number currently in use.])
# to detect multiple Pyhton versions
#AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
# [If available, contains the Python version number currently in use.])
# First, the library directory: # First, the library directory:
ac_python_libdir=`cat<<EOD | $PYTHON - ac_python_libdir=`cat<<EOD | $PYTHON -
# There should be only one # There should be only one
import distutils.sysconfig $IMPORT_SYSCONFIG
e = distutils.sysconfig.get_config_var('LIBDIR') e = sysconfig.get_config_var('LIBDIR')
if e is not None: if e is not None:
print (e) print (e)
EOD` EOD`
@ -214,8 +290,8 @@ EOD`
# Now, for the library: # Now, for the library:
ac_python_library=`cat<<EOD | $PYTHON - ac_python_library=`cat<<EOD | $PYTHON -
import distutils.sysconfig $IMPORT_SYSCONFIG
c = distutils.sysconfig.get_config_vars() c = sysconfig.get_config_vars()
if 'LDVERSION' in c: if 'LDVERSION' in c:
print ('python'+c[['LDVERSION']]) print ('python'+c[['LDVERSION']])
else: else:
@ -230,94 +306,160 @@ EOD`
then then
# use the official shared library # use the official shared library
ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"` ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library" PYTHON_LIBS="-L$ac_python_libdir -l$ac_python_library"
else else
# old way: use libpython from python_configdir # old way: use libpython from python_configdir
ac_python_libdir=`$PYTHON -c \ ac_python_libdir=`$PYTHON -c \
"from distutils.sysconfig import get_python_lib as f; \ "from sysconfig import get_python_lib as f; \
import os; \ import os; \
print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"` print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version" PYTHON_LIBS="-L$ac_python_libdir -lpython$ac_python_version"
fi fi
if test -z "PYTHON_LDFLAGS"; then if test -z "PYTHON_LIBS"; then
AC_MSG_ERROR([ AC_MSG_WARN([
Cannot determine location of your Python DSO. Please check it was installed with Cannot determine location of your Python DSO. Please check it was installed with
dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand. dynamic libraries enabled, or try setting PYTHON_LIBS by hand.
]) ])
if ! $ax_python_devel_optional; then
AC_MSG_ERROR([Giving up])
fi
ax_python_devel_found=no
PYTHON_VERSION=""
fi fi
fi
fi fi
AC_MSG_RESULT([$PYTHON_LDFLAGS])
AC_SUBST([PYTHON_LDFLAGS])
# if test $ax_python_devel_found = yes; then
# Check for site packages AC_MSG_RESULT([$PYTHON_LIBS])
# AC_SUBST([PYTHON_LIBS])
AC_MSG_CHECKING([for Python site-packages path])
if test -z "$PYTHON_SITE_PKG"; then
PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
print (distutils.sysconfig.get_python_lib(0,0));"`
fi
AC_MSG_RESULT([$PYTHON_SITE_PKG])
AC_SUBST([PYTHON_SITE_PKG])
# #
# libraries which must be linked in when embedding # Check for site packages
# #
AC_MSG_CHECKING(python extra libraries) AC_MSG_CHECKING([for Python site-packages path])
if test -z "$PYTHON_EXTRA_LIBS"; then if test -z "$PYTHON_SITE_PKG"; then
PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \ if test "$IMPORT_SYSCONFIG" = "import sysconfig"; then
conf = distutils.sysconfig.get_config_var; \ PYTHON_SITE_PKG=`$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 "$IMPORT_SYSCONFIG; \
conf = sysconfig.get_config_var; \
print (conf('LIBS') + ' ' + conf('SYSLIBS'))"` print (conf('LIBS') + ' ' + conf('SYSLIBS'))"`
fi fi
AC_MSG_RESULT([$PYTHON_EXTRA_LIBS]) AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
AC_SUBST(PYTHON_EXTRA_LIBS) AC_SUBST(PYTHON_EXTRA_LIBS)
# #
# linking flags needed when embedding # linking flags needed when embedding
# #
AC_MSG_CHECKING(python extra linking flags) AC_MSG_CHECKING(python extra linking flags)
if test -z "$PYTHON_EXTRA_LDFLAGS"; then if test -z "$PYTHON_EXTRA_LDFLAGS"; then
PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \ PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "$IMPORT_SYSCONFIG; \
conf = distutils.sysconfig.get_config_var; \ conf = sysconfig.get_config_var; \
print (conf('LINKFORSHARED'))"` print (conf('LINKFORSHARED'))"`
fi # Hack for macos, it sticks this in here.
AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS]) PYTHON_EXTRA_LDFLAGS=`echo $PYTHON_EXTRA_LDFLAGS | sed 's/CoreFoundation.*$/CoreFoundation/'`
AC_SUBST(PYTHON_EXTRA_LDFLAGS) fi
AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
AC_SUBST(PYTHON_EXTRA_LDFLAGS)
# #
# final check to see if everything compiles alright # final check to see if everything compiles alright
# #
AC_MSG_CHECKING([consistency of all components of python development environment]) AC_MSG_CHECKING([consistency of all components of python development environment])
# save current global flags # save current global flags
ac_save_LIBS="$LIBS" ac_save_LIBS="$LIBS"
ac_save_CPPFLAGS="$CPPFLAGS" ac_save_LDFLAGS="$LDFLAGS"
LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS" ac_save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS" LIBS="$ac_save_LIBS $PYTHON_LIBS $PYTHON_EXTRA_LIBS"
AC_LANG_PUSH([C]) LDFLAGS="$ac_save_LDFLAGS $PYTHON_EXTRA_LDFLAGS"
AC_LINK_IFELSE([ CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
AC_LANG_PUSH([C])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[#include <Python.h>]], AC_LANG_PROGRAM([[#include <Python.h>]],
[[Py_Initialize();]]) [[Py_Initialize();]])
],[pythonexists=yes],[pythonexists=no]) ],[pythonexists=yes],[pythonexists=no])
AC_LANG_POP([C]) AC_LANG_POP([C])
# turn back to default flags # turn back to default flags
CPPFLAGS="$ac_save_CPPFLAGS" CPPFLAGS="$ac_save_CPPFLAGS"
LIBS="$ac_save_LIBS" LIBS="$ac_save_LIBS"
LDFLAGS="$ac_save_LDFLAGS"
AC_MSG_RESULT([$pythonexists]) AC_MSG_RESULT([$pythonexists])
if test ! "x$pythonexists" = "xyes"; then if test ! "x$pythonexists" = "xyes"; then
AC_MSG_WARN([ AC_MSG_WARN([
Could not link test program to Python. Maybe the main Python library has been 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, installed in some non-standard library path. If so, pass it to configure,
via the LDFLAGS environment variable. via the LIBS environment variable.
Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib" Example: ./configure LIBS="-L/usr/non-standard-path/python/lib"
============================================================================ ============================================================================
ERROR!
You probably have to install the development version of the Python package You probably have to install the development version of the Python package
for your distribution. The exact name of this package varies among them. for your distribution. The exact name of this package varies among them.
============================================================================ ============================================================================
]) ])
PYTHON_VERSION="" if ! $ax_python_devel_optional; then
AC_MSG_ERROR([Giving up])
fi
ax_python_devel_found=no
PYTHON_VERSION=""
fi
fi fi
# #