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+## ------------------------ -*- Autoconf -*-
+## Python file handling
+## From Andrew Dalke
+## Updated by James Henstridge and other contributors.
+## ------------------------
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+
+# AM_PATH_PYTHON([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# ---------------------------------------------------------------------------
+# Adds support for distributing Python modules and packages. To
+# install modules, copy them to $(pythondir), using the python_PYTHON
+# automake variable. To install a package with the same name as the
+# automake package, install to $(pkgpythondir), or use the
+# pkgpython_PYTHON automake variable.
+#
+# The variables $(pyexecdir) and $(pkgpyexecdir) are provided as
+# locations to install python extension modules (shared libraries).
+# Another macro is required to find the appropriate flags to compile
+# extension modules.
+#
+# If your package is configured with a different prefix to python,
+# users will have to add the install directory to the PYTHONPATH
+# environment variable, or create a .pth file (see the python
+# documentation for details).
+#
+# If the MINIMUM-VERSION argument is passed, AM_PATH_PYTHON will
+# cause an error if the version of python installed on the system
+# doesn't meet the requirement. MINIMUM-VERSION should consist of
+# numbers and dots only.
+AC_DEFUN([AM_PATH_PYTHON],
+ [
+ dnl Find a Python interpreter. Python versions prior to 2.0 are not
+ dnl supported. (2.0 was released on October 16, 2000).
+ m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
+[python python2 python3 dnl
+ python3.11 python3.10 dnl
+ python3.9 python3.8 python3.7 python3.6 python3.5 python3.4 python3.3 dnl
+ python3.2 python3.1 python3.0 dnl
+ python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 dnl
+ python2.0])
+
+ AC_ARG_VAR([PYTHON], [the Python interpreter])
+
+ m4_if([$1],[],[
+ dnl No version check is needed.
+ # Find any Python interpreter.
+ if test -z "$PYTHON"; then
+ AC_PATH_PROGS([PYTHON], _AM_PYTHON_INTERPRETER_LIST, :)
+ fi
+ am_display_PYTHON=python
+ ], [
+ dnl A version check is needed.
+ if test -n "$PYTHON"; then
+ # If the user set $PYTHON, use it and don't search something else.
+ AC_MSG_CHECKING([whether $PYTHON version is >= $1])
+ AM_PYTHON_CHECK_VERSION([$PYTHON], [$1],
+ [AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])
+ AC_MSG_ERROR([Python interpreter is too old])])
+ am_display_PYTHON=$PYTHON
+ else
+ # Otherwise, try each interpreter until we find one that satisfies
+ # VERSION.
+ AC_CACHE_CHECK([for a Python interpreter with version >= $1],
+ [am_cv_pathless_PYTHON],[
+ for am_cv_pathless_PYTHON in _AM_PYTHON_INTERPRETER_LIST none; do
+ test "$am_cv_pathless_PYTHON" = none && break
+ AM_PYTHON_CHECK_VERSION([$am_cv_pathless_PYTHON], [$1], [break])
+ done])
+ # Set $PYTHON to the absolute path of $am_cv_pathless_PYTHON.
+ if test "$am_cv_pathless_PYTHON" = none; then
+ PYTHON=:
+ else
+ AC_PATH_PROG([PYTHON], [$am_cv_pathless_PYTHON])
+ fi
+ am_display_PYTHON=$am_cv_pathless_PYTHON
+ fi
+ ])
+
+ if test "$PYTHON" = :; then
+ dnl Run any user-specified action, or abort.
+ m4_default([$3], [AC_MSG_ERROR([no suitable Python interpreter found])])
+ else
+
+ dnl Query Python for its version number. Although site.py simply uses
+ dnl sys.version[:3], printing that failed with Python 3.10, since the
+ dnl trailing zero was eliminated. So now we output just the major
+ dnl and minor version numbers, as numbers. Apparently the tertiary
+ dnl version is not of interest.
+ dnl
+ AC_CACHE_CHECK([for $am_display_PYTHON version], [am_cv_python_version],
+ [am_cv_python_version=`$PYTHON -c "import sys; print ('%u.%u' % sys.version_info[[:2]])"`])
+ AC_SUBST([PYTHON_VERSION], [$am_cv_python_version])
+
+ dnl At times, e.g., when building shared libraries, you may want
+ dnl to know which OS platform Python thinks this is.
+ dnl
+ AC_CACHE_CHECK([for $am_display_PYTHON platform], [am_cv_python_platform],
+ [am_cv_python_platform=`$PYTHON -c "import sys; sys.stdout.write(sys.platform)"`])
+ AC_SUBST([PYTHON_PLATFORM], [$am_cv_python_platform])
+
+ dnl emacs-page
+ dnl If --with-python-sys-prefix is given, use the values of sys.prefix
+ dnl and sys.exec_prefix for the corresponding values of PYTHON_PREFIX
+ dnl and PYTHON_EXEC_PREFIX. Otherwise, use the GNU ${prefix} and
+ dnl ${exec_prefix} variables.
+ dnl
+ dnl The two are made distinct variables so they can be overridden if
+ dnl need be, although general consensus is that you shouldn't need
+ dnl this separation.
+ dnl
+ dnl Also allow directly setting the prefixes via configure options,
+ dnl overriding any default.
+ dnl
+ if test "x$prefix" = xNONE; then
+ am__usable_prefix=$ac_default_prefix
+ else
+ am__usable_prefix=$prefix
+ fi
+
+ # Allow user to request using sys.* values from Python,
+ # instead of the GNU $prefix values.
+ AC_ARG_WITH([python-sys-prefix],
+ [AS_HELP_STRING([--with-python-sys-prefix],
+ [use Python's sys.prefix and sys.exec_prefix values])],
+ [am_use_python_sys=:],
+ [am_use_python_sys=false])
+
+ # Allow user to override whatever the default Python prefix is.
+ AC_ARG_WITH([python_prefix],
+ [AS_HELP_STRING([--with-python_prefix],
+ [override the default PYTHON_PREFIX])],
+ [am_python_prefix_subst=$withval
+ am_cv_python_prefix=$withval
+ AC_MSG_CHECKING([for explicit $am_display_PYTHON prefix])
+ AC_MSG_RESULT([$am_cv_python_prefix])],
+ [
+ if $am_use_python_sys; then
+ # using python sys.prefix value, not GNU
+ AC_CACHE_CHECK([for python default $am_display_PYTHON prefix],
+ [am_cv_python_prefix],
+ [am_cv_python_prefix=`$PYTHON -c "import sys; sys.stdout.write(sys.prefix)"`])
+
+ dnl If sys.prefix is a subdir of $prefix, replace the literal value of
+ dnl $prefix with a variable reference so it can be overridden.
+ case $am_cv_python_prefix in
+ $am__usable_prefix*)
+ am__strip_prefix=`echo "$am__usable_prefix" | sed 's|.|.|g'`
+ am_python_prefix_subst=`echo "$am_cv_python_prefix" | sed "s,^$am__strip_prefix,\\${prefix},"`
+ ;;
+ *)
+ am_python_prefix_subst=$am_cv_python_prefix
+ ;;
+ esac
+ else # using GNU prefix value, not python sys.prefix
+ am_python_prefix_subst='${prefix}'
+ am_python_prefix=$am_python_prefix_subst
+ AC_MSG_CHECKING([for GNU default $am_display_PYTHON prefix])
+ AC_MSG_RESULT([$am_python_prefix])
+ fi])
+ # Substituting python_prefix_subst value.
+ AC_SUBST([PYTHON_PREFIX], [$am_python_prefix_subst])
+
+ # emacs-page Now do it all over again for Python exec_prefix, but with yet
+ # another conditional: fall back to regular prefix if that was specified.
+ AC_ARG_WITH([python_exec_prefix],
+ [AS_HELP_STRING([--with-python_exec_prefix],
+ [override the default PYTHON_EXEC_PREFIX])],
+ [am_python_exec_prefix_subst=$withval
+ am_cv_python_exec_prefix=$withval
+ AC_MSG_CHECKING([for explicit $am_display_PYTHON exec_prefix])
+ AC_MSG_RESULT([$am_cv_python_exec_prefix])],
+ [
+ # no explicit --with-python_exec_prefix, but if
+ # --with-python_prefix was given, use its value for python_exec_prefix too.
+ AS_IF([test -n "$with_python_prefix"],
+ [am_python_exec_prefix_subst=$with_python_prefix
+ am_cv_python_exec_prefix=$with_python_prefix
+ AC_MSG_CHECKING([for python_prefix-given $am_display_PYTHON exec_prefix])
+ AC_MSG_RESULT([$am_cv_python_exec_prefix])],
+ [
+ # Set am__usable_exec_prefix whether using GNU or Python values,
+ # since we use that variable for pyexecdir.
+ if test "x$exec_prefix" = xNONE; then
+ am__usable_exec_prefix=$am__usable_prefix
+ else
+ am__usable_exec_prefix=$exec_prefix
+ fi
+ #
+ if $am_use_python_sys; then # using python sys.exec_prefix, not GNU
+ AC_CACHE_CHECK([for python default $am_display_PYTHON exec_prefix],
+ [am_cv_python_exec_prefix],
+ [am_cv_python_exec_prefix=`$PYTHON -c "import sys; sys.stdout.write(sys.exec_prefix)"`])
+ dnl If sys.exec_prefix is a subdir of $exec_prefix, replace the
+ dnl literal value of $exec_prefix with a variable reference so it can
+ dnl be overridden.
+ case $am_cv_python_exec_prefix in
+ $am__usable_exec_prefix*)
+ am__strip_prefix=`echo "$am__usable_exec_prefix" | sed 's|.|.|g'`
+ am_python_exec_prefix_subst=`echo "$am_cv_python_exec_prefix" | sed "s,^$am__strip_prefix,\\${exec_prefix},"`
+ ;;
+ *)
+ am_python_exec_prefix_subst=$am_cv_python_exec_prefix
+ ;;
+ esac
+ else # using GNU $exec_prefix, not python sys.exec_prefix
+ am_python_exec_prefix_subst='${exec_prefix}'
+ am_python_exec_prefix=$am_python_exec_prefix_subst
+ AC_MSG_CHECKING([for GNU default $am_display_PYTHON exec_prefix])
+ AC_MSG_RESULT([$am_python_exec_prefix])
+ fi])])
+ # Substituting python_exec_prefix_subst.
+ AC_SUBST([PYTHON_EXEC_PREFIX], [$am_python_exec_prefix_subst])
+
+ # Factor out some code duplication into this shell variable.
+ am_python_setup_sysconfig="\
+import sys
+# Prefer sysconfig over distutils.sysconfig, for better compatibility
+# with python 3.x. See automake bug#10227.
+try:
+ import sysconfig
+except ImportError:
+ can_use_sysconfig = 0
+else:
+ can_use_sysconfig = 1
+# Can't use sysconfig in CPython 2.7, since it's broken in virtualenvs:
+# <https://github.com/pypa/virtualenv/issues/118>
+try:
+ from platform import python_implementation
+ if python_implementation() == 'CPython' and sys.version[[:3]] == '2.7':
+ can_use_sysconfig = 0
+except ImportError:
+ pass"
+
+ dnl emacs-page Set up 4 directories:
+
+ dnl 1. pythondir: where to install python scripts. This is the
+ dnl site-packages directory, not the python standard library
+ dnl directory like in previous automake betas. This behavior
+ dnl is more consistent with lispdir.m4 for example.
+ dnl Query distutils for this directory.
+ dnl
+ AC_CACHE_CHECK([for $am_display_PYTHON script directory (pythondir)],
+ [am_cv_python_pythondir],
+ [if test "x$am_cv_python_prefix" = x; then
+ am_py_prefix=$am__usable_prefix
+ else
+ am_py_prefix=$am_cv_python_prefix
+ fi
+ am_cv_python_pythondir=`$PYTHON -c "
+$am_python_setup_sysconfig
+if can_use_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'
+ sitedir = sysconfig.get_path('purelib', scheme, vars={'base':'$am_py_prefix'})
+else:
+ from distutils import sysconfig
+ sitedir = sysconfig.get_python_lib(0, 0, prefix='$am_py_prefix')
+sys.stdout.write(sitedir)"`
+ #
+ case $am_cv_python_pythondir in
+ $am_py_prefix*)
+ am__strip_prefix=`echo "$am_py_prefix" | sed 's|.|.|g'`
+ am_cv_python_pythondir=`echo "$am_cv_python_pythondir" | sed "s,^$am__strip_prefix,\\${PYTHON_PREFIX},"`
+ ;;
+ *)
+ case $am_py_prefix in
+ /usr|/System*) ;;
+ *) am_cv_python_pythondir="\${PYTHON_PREFIX}/lib/python$PYTHON_VERSION/site-packages"
+ ;;
+ esac
+ ;;
+ esac
+ ])
+ AC_SUBST([pythondir], [$am_cv_python_pythondir])
+
+ dnl 2. pkgpythondir: $PACKAGE directory under pythondir. Was
+ dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
+ dnl more consistent with the rest of automake.
+ dnl
+ AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
+
+ dnl 3. pyexecdir: directory for installing python extension modules
+ dnl (shared libraries).
+ dnl Query distutils for this directory.
+ dnl
+ AC_CACHE_CHECK([for $am_display_PYTHON extension module directory (pyexecdir)],
+ [am_cv_python_pyexecdir],
+ [if test "x$am_cv_python_exec_prefix" = x; then
+ am_py_exec_prefix=$am__usable_exec_prefix
+ else
+ am_py_exec_prefix=$am_cv_python_exec_prefix
+ fi
+ am_cv_python_pyexecdir=`$PYTHON -c "
+$am_python_setup_sysconfig
+if can_use_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'
+ sitedir = sysconfig.get_path('platlib', scheme, vars={'platbase':'$am_py_exec_prefix'})
+else:
+ from distutils import sysconfig
+ sitedir = sysconfig.get_python_lib(1, 0, prefix='$am_py_exec_prefix')
+sys.stdout.write(sitedir)"`
+ #
+ case $am_cv_python_pyexecdir in
+ $am_py_exec_prefix*)
+ am__strip_prefix=`echo "$am_py_exec_prefix" | sed 's|.|.|g'`
+ am_cv_python_pyexecdir=`echo "$am_cv_python_pyexecdir" | sed "s,^$am__strip_prefix,\\${PYTHON_EXEC_PREFIX},"`
+ ;;
+ *)
+ case $am_py_exec_prefix in
+ /usr|/System*) ;;
+ *) am_cv_python_pyexecdir="\${PYTHON_EXEC_PREFIX}/lib/python$PYTHON_VERSION/site-packages"
+ ;;
+ esac
+ ;;
+ esac
+ ])
+ AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])
+
+ dnl 4. pkgpyexecdir: $(pyexecdir)/$(PACKAGE)
+ dnl
+ AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
+
+ dnl Run any user-specified action.
+ $2
+ fi
+])
+
+
+# AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
+# ---------------------------------------------------------------------------
+# Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
+# Run ACTION-IF-FALSE otherwise.
+# This test uses sys.hexversion instead of the string equivalent (first
+# word of sys.version), in order to cope with versions such as 2.2c1.
+# This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
+AC_DEFUN([AM_PYTHON_CHECK_VERSION],
+ [prog="import sys
+# split strings by '.' and convert to numeric. Append some zeros
+# because we need at least 4 digits for the hex conversion.
+# map returns an iterator in Python 3.0 and a list in 2.x
+minver = list(map(int, '$2'.split('.'))) + [[0, 0, 0]]
+minverhex = 0
+# xrange is not present in Python 3.0 and range returns an iterator
+for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
+sys.exit(sys.hexversion < minverhex)"
+ AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])