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acx_python.m4
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acx_python.m4
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AC_DEFUN([AC_PYTHON_DEVEL],[
#
# Allow the use of a (user set) custom python version
#
AC_ARG_VAR([PYTHON_VERSION],[The installed Python
version to use, for example '2.3'. This string
will be appended to the Python interpreter
canonical name.])
AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
if test -z "$PYTHON"; then
AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path])
PYTHON_VERSION=""
fi
if test -z "$PYTHON_VERSION"; then
PYTHON_VERSION=`$PYTHON -c "import sys; \
print(sys.version.split()[[0]])"`
fi
# calculate the version number components.
[
v="$PYTHON_VERSION"
PYTHON_VERSION_MAJOR=`echo $v | sed 's/[^0-9].*//'`
if test -z "$PYTHON_VERSION_MAJOR"; then PYTHON_VERSION_MAJOR="0"; fi
v=`echo $v | sed -e 's/^[0-9]*$//' -e 's/[0-9]*[^0-9]//'`
PYTHON_VERSION_MINOR=`echo $v | sed 's/[^0-9].*//'`
if test -z "$PYTHON_VERSION_MINOR"; then PYTHON_VERSION_MINOR="0"; fi
v=`echo $v | sed -e 's/^[0-9]*$//' -e 's/[0-9]*[^0-9]//'`
PYTHON_VERSION_PATCH=`echo $v | sed 's/[^0-9].*//'`
if test -z "$PYTHON_VERSION_PATCH"; then PYTHON_VERSION_PATCH="0"; fi
]
# For some systems, sysconfig exists, but has the wrong paths,
# on Debian 10, for python 2.7 and 3.7. So, we check the version,
# and for older versions try distutils.sysconfig first. For newer
# versions>=3.10, where distutils.sysconfig is deprecated, use
# sysconfig first and then attempt the other one.
py_distutils_first="no"
if test $PYTHON_VERSION_MAJOR -lt 3; then
py_distutils_first="yes"
fi
if test $PYTHON_VERSION_MAJOR -eq 3 -a $PYTHON_VERSION_MINOR -lt 10; then
py_distutils_first="yes"
fi
# Check if you have the first module
if test "$py_distutils_first" = "yes"; then m="distutils"; else m="sysconfig"; fi
sysconfig_module=""
AC_MSG_CHECKING([for the $m Python module])
if ac_modulecheck_result1=`$PYTHON -c "import $m" 2>&1`; then
AC_MSG_RESULT([yes])
sysconfig_module="$m"
else
AC_MSG_RESULT([no])
fi
# if not found, try the other one.
if test -z "$sysconfig_module"; then
if test "$py_distutils_first" = "yes"; then m2="sysconfig"; else m2="distutils"; fi
AC_MSG_CHECKING([for the $m2 Python module])
if ac_modulecheck_result2=`$PYTHON -c "import $m2" 2>&1`; then
AC_MSG_RESULT([yes])
sysconfig_module="$m2"
else
AC_MSG_RESULT([no])
AC_MSG_ERROR([cannot import Python module "$m", or "$m2".
Please check your Python installation. The errors are:
$m
$ac_modulecheck_result1
$m2
$ac_modulecheck_result2])
PYTHON_VERSION=""
fi
fi
if test "$sysconfig_module" = "distutils"; then sysconfig_module="distutils.sysconfig"; fi
#
# Check for Python include path
#
AC_MSG_CHECKING([for Python include path])
if test -z "$PYTHON_CPPFLAGS"; then
if test "$sysconfig_module" = "sysconfig"; then
python_path=`$PYTHON -c 'import sysconfig; \
print(sysconfig.get_path("include"));'`
else
python_path=`$PYTHON -c "import distutils.sysconfig; \
print(distutils.sysconfig.get_python_inc());"`
fi
if test -n "${python_path}"; then
python_path="-I$python_path"
fi
PYTHON_CPPFLAGS=$python_path
fi
AC_MSG_RESULT([$PYTHON_CPPFLAGS])
AC_SUBST([PYTHON_CPPFLAGS])
#
# Check for Python library path
#
AC_MSG_CHECKING([for Python library path])
if test -z "$PYTHON_LDFLAGS"; then
PYTHON_LDFLAGS=`$PYTHON -c "from $sysconfig_module import *; \
print('-L'+get_config_var('LIBDIR')+' -L'+get_config_var('LIBDEST')+' '+get_config_var('BLDLIBRARY'));"`
fi
AC_MSG_RESULT([$PYTHON_LDFLAGS])
AC_SUBST([PYTHON_LDFLAGS])
if test -z "$PYTHON_LIBDIR"; then
PYTHON_LIBDIR=`$PYTHON -c "from $sysconfig_module import *; \
print(get_config_var('LIBDIR'));"`
fi
#
# Check for site packages
#
AC_MSG_CHECKING([for Python site-packages path])
if test -z "$PYTHON_SITE_PKG"; then
if test "$sysconfig_module" = "sysconfig"; then
PYTHON_SITE_PKG=`$PYTHON -c 'import sysconfig; \
print(sysconfig.get_path("platlib"));'`
else
PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
print(distutils.sysconfig.get_python_lib(1,0));"`
fi
fi
AC_MSG_RESULT([$PYTHON_SITE_PKG])
AC_SUBST([PYTHON_SITE_PKG])
#
# final check to see if everything compiles alright
#
AC_MSG_CHECKING([consistency of all components of python development environment])
AC_LANG_PUSH([C])
# save current global flags
ac_save_LIBS="$LIBS"
ac_save_CPPFLAGS="$CPPFLAGS"
LIBS="$LIBS $PYTHON_LDFLAGS"
CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <Python.h>
]],[[
Py_Initialize();
]])],[pythonexists=yes],[pythonexists=no])
AC_MSG_RESULT([$pythonexists])
if test ! "$pythonexists" = "yes"; then
AC_MSG_ERROR([
Could not link test program to Python. Maybe the main Python library has been
installed in some non-standard library path. If so, pass it to configure,
via the LDFLAGS environment variable.
Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
============================================================================
ERROR!
You probably have to install the development version of the Python package
for your distribution. The exact name of this package varies among them.
============================================================================
])
PYTHON_VERSION=""
fi
AC_LANG_POP
# turn back to default flags
CPPFLAGS="$ac_save_CPPFLAGS"
LIBS="$ac_save_LIBS"
#
# all done!
#
])