1 ## ------------------------ -*- Autoconf -*-
2 ## Python file handling
4 ## Updated by James Henstridge
5 ## ------------------------
6 # Copyright (C) 1999-2017 Free Software Foundation, Inc.
8 # This file is free software; the Free Software Foundation
9 # gives unlimited permission to copy and/or distribute it,
10 # with or without modifications, as long as this notice is preserved.
13 # AM_PATH_PYTHON([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
14 # ---------------------------------------------------------------------------
15 # Adds support for distributing Python modules and packages. To
16 # install modules, copy them to $(pythondir), using the python_PYTHON
17 # automake variable. To install a package with the same name as the
18 # automake package, install to $(pkgpythondir), or use the
19 # pkgpython_PYTHON automake variable.
21 # The variables $(pyexecdir) and $(pkgpyexecdir) are provided as
22 # locations to install python extension modules (shared libraries).
23 # Another macro is required to find the appropriate flags to compile
26 # If your package is configured with a different prefix to python,
27 # users will have to add the install directory to the PYTHONPATH
28 # environment variable, or create a .pth file (see the python
29 # documentation for details).
31 # If the MINIMUM-VERSION argument is passed, AM_PATH_PYTHON will
32 # cause an error if the version of python installed on the system
33 # doesn't meet the requirement. MINIMUM-VERSION should consist of
34 # numbers and dots only.
35 AC_DEFUN([AM_PATH_PYTHON],
37 dnl Find a Python interpreter. Python versions prior to 2.0 are not
38 dnl supported. (2.0 was released on October 16, 2000).
39 dnl FIXME: Remove the need to hard-code Python versions here.
40 m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
41 [python python2 python3 python3.6 python3.5 python3.4 python3.3 python3.2 dnl
42 python3.1 python3.0 python2.7 python2.6 python2.5 python2.4 python2.3 dnl
43 python2.2 python2.1 python2.0])
45 AC_ARG_VAR([PYTHON], [the Python interpreter])
48 dnl No version check is needed.
49 # Find any Python interpreter.
50 if test -z "$PYTHON"; then
51 AC_PATH_PROGS([PYTHON], _AM_PYTHON_INTERPRETER_LIST, :)
53 am_display_PYTHON=python
55 dnl A version check is needed.
56 if test -n "$PYTHON"; then
57 # If the user set $PYTHON, use it and don't search something else.
58 AC_MSG_CHECKING([whether $PYTHON version is >= $1])
59 AM_PYTHON_CHECK_VERSION([$PYTHON], [$1],
60 [AC_MSG_RESULT([yes])],
62 AC_MSG_ERROR([Python interpreter is too old])])
63 am_display_PYTHON=$PYTHON
65 # Otherwise, try each interpreter until we find one that satisfies
67 AC_CACHE_CHECK([for a Python interpreter with version >= $1],
68 [am_cv_pathless_PYTHON],[
69 for am_cv_pathless_PYTHON in _AM_PYTHON_INTERPRETER_LIST none; do
70 test "$am_cv_pathless_PYTHON" = none && break
71 AM_PYTHON_CHECK_VERSION([$am_cv_pathless_PYTHON], [$1], [break])
73 # Set $PYTHON to the absolute path of $am_cv_pathless_PYTHON.
74 if test "$am_cv_pathless_PYTHON" = none; then
77 AC_PATH_PROG([PYTHON], [$am_cv_pathless_PYTHON])
79 am_display_PYTHON=$am_cv_pathless_PYTHON
83 if test "$PYTHON" = :; then
84 dnl Run any user-specified action, or abort.
85 m4_default([$3], [AC_MSG_ERROR([no suitable Python interpreter found])])
88 dnl Query Python for its version number. Getting [:3] seems to be
89 dnl the best way to do this; it's what "site.py" does in the standard
92 AC_CACHE_CHECK([for $am_display_PYTHON version], [am_cv_python_version],
93 [am_cv_python_version=`$PYTHON -c "import sys; sys.stdout.write(sys.version[[:3]])"`])
94 AC_SUBST([PYTHON_VERSION], [$am_cv_python_version])
96 dnl Use the values of $prefix and $exec_prefix for the corresponding
97 dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made
98 dnl distinct variables so they can be overridden if need be. However,
99 dnl general consensus is that you shouldn't need this ability.
101 AC_SUBST([PYTHON_PREFIX], ['${prefix}'])
102 AC_SUBST([PYTHON_EXEC_PREFIX], ['${exec_prefix}'])
104 dnl At times (like when building shared libraries) you may want
105 dnl to know which OS platform Python thinks this is.
107 AC_CACHE_CHECK([for $am_display_PYTHON platform], [am_cv_python_platform],
108 [am_cv_python_platform=`$PYTHON -c "import sys; sys.stdout.write(sys.platform)"`])
109 AC_SUBST([PYTHON_PLATFORM], [$am_cv_python_platform])
111 # Just factor out some code duplication.
112 am_python_setup_sysconfig="\
114 # Prefer sysconfig over distutils.sysconfig, for better compatibility
115 # with python 3.x. See automake bug#10227.
119 can_use_sysconfig = 0
121 can_use_sysconfig = 1
122 # Can't use sysconfig in CPython 2.7, since it's broken in virtualenvs:
123 # <https://github.com/pypa/virtualenv/issues/118>
125 from platform import python_implementation
126 if python_implementation() == 'CPython' and sys.version[[:3]] == '2.7':
127 can_use_sysconfig = 0
131 dnl Set up 4 directories:
133 dnl pythondir -- where to install python scripts. This is the
134 dnl site-packages directory, not the python standard library
135 dnl directory like in previous automake betas. This behavior
136 dnl is more consistent with lispdir.m4 for example.
137 dnl Query distutils for this directory.
138 AC_CACHE_CHECK([for $am_display_PYTHON script directory],
139 [am_cv_python_pythondir],
140 [if test "x$prefix" = xNONE
142 am_py_prefix=$ac_default_prefix
146 am_cv_python_pythondir=`$PYTHON -c "
147 $am_python_setup_sysconfig
148 if can_use_sysconfig:
149 sitedir = sysconfig.get_path('purelib', vars={'base':'$am_py_prefix'})
151 from distutils import sysconfig
152 sitedir = sysconfig.get_python_lib(0, 0, prefix='$am_py_prefix')
153 sys.stdout.write(sitedir)"`
154 case $am_cv_python_pythondir in
156 am__strip_prefix=`echo "$am_py_prefix" | sed 's|.|.|g'`
157 am_cv_python_pythondir=`echo "$am_cv_python_pythondir" | sed "s,^$am__strip_prefix,$PYTHON_PREFIX,"`
160 case $am_py_prefix in
163 am_cv_python_pythondir=$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages
169 AC_SUBST([pythondir], [$am_cv_python_pythondir])
171 dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
172 dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
173 dnl more consistent with the rest of automake.
175 AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
177 dnl pyexecdir -- directory for installing python extension modules
178 dnl (shared libraries)
179 dnl Query distutils for this directory.
180 AC_CACHE_CHECK([for $am_display_PYTHON extension module directory],
181 [am_cv_python_pyexecdir],
182 [if test "x$exec_prefix" = xNONE
184 am_py_exec_prefix=$am_py_prefix
186 am_py_exec_prefix=$exec_prefix
188 am_cv_python_pyexecdir=`$PYTHON -c "
189 $am_python_setup_sysconfig
190 if can_use_sysconfig:
191 sitedir = sysconfig.get_path('platlib', vars={'platbase':'$am_py_prefix'})
193 from distutils import sysconfig
194 sitedir = sysconfig.get_python_lib(1, 0, prefix='$am_py_prefix')
195 sys.stdout.write(sitedir)"`
196 case $am_cv_python_pyexecdir in
198 am__strip_prefix=`echo "$am_py_exec_prefix" | sed 's|.|.|g'`
199 am_cv_python_pyexecdir=`echo "$am_cv_python_pyexecdir" | sed "s,^$am__strip_prefix,$PYTHON_EXEC_PREFIX,"`
202 case $am_py_exec_prefix in
205 am_cv_python_pyexecdir=$PYTHON_EXEC_PREFIX/lib/python$PYTHON_VERSION/site-packages
211 AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])
213 dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
215 AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
217 dnl Run any user-specified action.
224 # AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
225 # ---------------------------------------------------------------------------
226 # Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
227 # Run ACTION-IF-FALSE otherwise.
228 # This test uses sys.hexversion instead of the string equivalent (first
229 # word of sys.version), in order to cope with versions such as 2.2c1.
230 # This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
231 AC_DEFUN([AM_PYTHON_CHECK_VERSION],
233 # split strings by '.' and convert to numeric. Append some zeros
234 # because we need at least 4 digits for the hex conversion.
235 # map returns an iterator in Python 3.0 and a list in 2.x
236 minver = list(map(int, '$2'.split('.'))) + [[0, 0, 0]]
238 # xrange is not present in Python 3.0 and range returns an iterator
239 for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
240 sys.exit(sys.hexversion < minverhex)"
241 AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])