1 ## ------------------------ -*- Autoconf -*-
2 ## Python file handling
4 ## Updated by James Henstridge
5 ## ------------------------
6 # Copyright (C) 1999-2012 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.
14 # AM_PATH_PYTHON([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
15 # ---------------------------------------------------------------------------
16 # Adds support for distributing Python modules and packages. To
17 # install modules, copy them to $(pythondir), using the python_PYTHON
18 # automake variable. To install a package with the same name as the
19 # automake package, install to $(pkgpythondir), or use the
20 # pkgpython_PYTHON automake variable.
22 # The variables $(pyexecdir) and $(pkgpyexecdir) are provided as
23 # locations to install python extension modules (shared libraries).
24 # Another macro is required to find the appropriate flags to compile
27 # If your package is configured with a different prefix to python,
28 # users will have to add the install directory to the PYTHONPATH
29 # environment variable, or create a .pth file (see the python
30 # documentation for details).
32 # If the MINIMUM-VERSION argument is passed, AM_PATH_PYTHON will
33 # cause an error if the version of python installed on the system
34 # doesn't meet the requirement. MINIMUM-VERSION should consist of
35 # numbers and dots only.
36 AC_DEFUN([AM_PATH_PYTHON],
38 dnl Find a Python interpreter. Python versions prior to 2.0 are not
39 dnl supported. (2.0 was released on October 16, 2000).
40 m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
41 [python python2 python3 python3.2 python3.1 python3.0 python2.7 dnl
42 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0])
44 AC_ARG_VAR([PYTHON], [the Python interpreter])
47 dnl No version check is needed.
48 # Find any Python interpreter.
49 if test -z "$PYTHON"; then
50 AC_PATH_PROGS([PYTHON], _AM_PYTHON_INTERPRETER_LIST, :)
52 am_display_PYTHON=python
54 dnl A version check is needed.
55 if test -n "$PYTHON"; then
56 # If the user set $PYTHON, use it and don't search something else.
57 AC_MSG_CHECKING([whether $PYTHON version is >= $1])
58 AM_PYTHON_CHECK_VERSION([$PYTHON], [$1],
59 [AC_MSG_RESULT([yes])],
61 AC_MSG_ERROR([Python interpreter is too old])])
62 am_display_PYTHON=$PYTHON
64 # Otherwise, try each interpreter until we find one that satisfies
66 AC_CACHE_CHECK([for a Python interpreter with version >= $1],
67 [am_cv_pathless_PYTHON],[
68 for am_cv_pathless_PYTHON in _AM_PYTHON_INTERPRETER_LIST none; do
69 test "$am_cv_pathless_PYTHON" = none && break
70 AM_PYTHON_CHECK_VERSION([$am_cv_pathless_PYTHON], [$1], [break])
72 # Set $PYTHON to the absolute path of $am_cv_pathless_PYTHON.
73 if test "$am_cv_pathless_PYTHON" = none; then
76 AC_PATH_PROG([PYTHON], [$am_cv_pathless_PYTHON])
78 am_display_PYTHON=$am_cv_pathless_PYTHON
82 if test "$PYTHON" = :; then
83 dnl Run any user-specified action, or abort.
84 m4_default([$3], [AC_MSG_ERROR([no suitable Python interpreter found])])
87 dnl Query Python for its version number. Getting [:3] seems to be
88 dnl the best way to do this; it's what "site.py" does in the standard
91 AC_CACHE_CHECK([for $am_display_PYTHON version], [am_cv_python_version],
92 [am_cv_python_version=`$PYTHON -c "import sys; sys.stdout.write(sys.version[[:3]])"`])
93 AC_SUBST([PYTHON_VERSION], [$am_cv_python_version])
95 dnl Use the values of $prefix and $exec_prefix for the corresponding
96 dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made
97 dnl distinct variables so they can be overridden if need be. However,
98 dnl general consensus is that you shouldn't need this ability.
100 AC_SUBST([PYTHON_PREFIX], ['${prefix}'])
101 AC_SUBST([PYTHON_EXEC_PREFIX], ['${exec_prefix}'])
103 dnl At times (like when building shared libraries) you may want
104 dnl to know which OS platform Python thinks this is.
106 AC_CACHE_CHECK([for $am_display_PYTHON platform], [am_cv_python_platform],
107 [am_cv_python_platform=`$PYTHON -c "import sys; sys.stdout.write(sys.platform)"`])
108 AC_SUBST([PYTHON_PLATFORM], [$am_cv_python_platform])
111 dnl Set up 4 directories:
113 dnl pythondir -- where to install python scripts. This is the
114 dnl site-packages directory, not the python standard library
115 dnl directory like in previous automake betas. This behavior
116 dnl is more consistent with lispdir.m4 for example.
117 dnl Query distutils for this directory.
118 AC_CACHE_CHECK([for $am_display_PYTHON script directory],
119 [am_cv_python_pythondir],
120 [if test "x$prefix" = xNONE
122 am_py_prefix=$ac_default_prefix
126 am_cv_python_pythondir=`$PYTHON -c "import sys; from distutils import sysconfig; sys.stdout.write(sysconfig.get_python_lib(0,0,prefix='$am_py_prefix'))" 2>/dev/null`
127 case $am_cv_python_pythondir in
129 am__strip_prefix=`echo "$am_py_prefix" | sed 's|.|.|g'`
130 am_cv_python_pythondir=`echo "$am_cv_python_pythondir" | sed "s,^$am__strip_prefix,$PYTHON_PREFIX,"`
133 case $am_py_prefix in
136 am_cv_python_pythondir=$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages
142 AC_SUBST([pythondir], [$am_cv_python_pythondir])
144 dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
145 dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
146 dnl more consistent with the rest of automake.
148 AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
150 dnl pyexecdir -- directory for installing python extension modules
151 dnl (shared libraries)
152 dnl Query distutils for this directory.
153 AC_CACHE_CHECK([for $am_display_PYTHON extension module directory],
154 [am_cv_python_pyexecdir],
155 [if test "x$exec_prefix" = xNONE
157 am_py_exec_prefix=$am_py_prefix
159 am_py_exec_prefix=$exec_prefix
161 am_cv_python_pyexecdir=`$PYTHON -c "import sys; from distutils import sysconfig; sys.stdout.write(sysconfig.get_python_lib(1,0,prefix='$am_py_exec_prefix'))" 2>/dev/null`
162 case $am_cv_python_pyexecdir in
164 am__strip_prefix=`echo "$am_py_exec_prefix" | sed 's|.|.|g'`
165 am_cv_python_pyexecdir=`echo "$am_cv_python_pyexecdir" | sed "s,^$am__strip_prefix,$PYTHON_EXEC_PREFIX,"`
168 case $am_py_exec_prefix in
171 am_cv_python_pyexecdir=$PYTHON_EXEC_PREFIX/lib/python$PYTHON_VERSION/site-packages
177 AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])
179 dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
181 AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
183 dnl Run any user-specified action.
190 # AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
191 # ---------------------------------------------------------------------------
192 # Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
193 # Run ACTION-IF-FALSE otherwise.
194 # This test uses sys.hexversion instead of the string equivalent (first
195 # word of sys.version), in order to cope with versions such as 2.2c1.
196 # This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
197 AC_DEFUN([AM_PYTHON_CHECK_VERSION],
199 # split strings by '.' and convert to numeric. Append some zeros
200 # because we need at least 4 digits for the hex conversion.
201 # map returns an iterator in Python 3.0 and a list in 2.x
202 minver = list(map(int, '$2'.split('.'))) + [[0, 0, 0]]
204 # xrange is not present in Python 3.0 and range returns an iterator
205 for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
206 sys.exit(sys.hexversion < minverhex)"
207 AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])