1 ## ------------------------ -*- Autoconf -*-
2 ## Python file handling
4 ## Updated by James Henstridge
5 ## ------------------------
6 # Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009,
7 # 2011 Free Software Foundation, Inc.
9 # This file is free software; the Free Software Foundation
10 # gives unlimited permission to copy and/or distribute it,
11 # with or without modifications, as long as this notice is preserved.
15 # AM_PATH_PYTHON([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
16 # ---------------------------------------------------------------------------
17 # Adds support for distributing Python modules and packages. To
18 # install modules, copy them to $(pythondir), using the python_PYTHON
19 # automake variable. To install a package with the same name as the
20 # automake package, install to $(pkgpythondir), or use the
21 # pkgpython_PYTHON automake variable.
23 # The variables $(pyexecdir) and $(pkgpyexecdir) are provided as
24 # locations to install python extension modules (shared libraries).
25 # Another macro is required to find the appropriate flags to compile
28 # If your package is configured with a different prefix to python,
29 # users will have to add the install directory to the PYTHONPATH
30 # environment variable, or create a .pth file (see the python
31 # documentation for details).
33 # If the MINIMUM-VERSION argument is passed, AM_PATH_PYTHON will
34 # cause an error if the version of python installed on the system
35 # doesn't meet the requirement. MINIMUM-VERSION should consist of
36 # numbers and dots only.
37 AC_DEFUN([AM_PATH_PYTHON],
39 dnl Find a Python interpreter. Python versions prior to 2.0 are not
40 dnl supported. (2.0 was released on October 16, 2000).
41 m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
42 [python python2 python3 python3.2 python3.1 python3.0 python2.7 dnl
43 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0])
45 AC_ARG_VAR([PYTHON], [the Python interpreter])
48 dnl No version check is needed.
49 # Find any Python interpreter.
50 if test -z "$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 >= $1])
59 AM_PYTHON_CHECK_VERSION([$PYTHON], [$1],
61 [AC_MSG_ERROR(too old)])
62 am_display_PYTHON=$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. distutils does not exist in
118 dnl Python 1.5, so we fall back to the hardcoded directory if it
120 AC_CACHE_CHECK([for $am_display_PYTHON script directory],
121 [am_cv_python_pythondir],
122 [if test "x$prefix" = xNONE
124 am_py_prefix=$ac_default_prefix
128 am_cv_python_pythondir=`$PYTHON -c "import sys; from distutils import sysconfig; sys.stdout.write(sysconfig.get_python_lib(0,0,prefix='$am_py_prefix'))" 2>/dev/null ||
129 echo "$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages"`
130 case $am_cv_python_pythondir in
132 am__strip_prefix=`echo "$am_py_prefix" | sed 's|.|.|g'`
133 am_cv_python_pythondir=`echo "$am_cv_python_pythondir" | sed "s,^$am__strip_prefix,$PYTHON_PREFIX,"`
136 case $am_py_prefix in
139 am_cv_python_pythondir=$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages
145 AC_SUBST([pythondir], [$am_cv_python_pythondir])
147 dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
148 dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
149 dnl more consistent with the rest of automake.
151 AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
153 dnl pyexecdir -- directory for installing python extension modules
154 dnl (shared libraries)
155 dnl Query distutils for this directory. distutils does not exist in
156 dnl Python 1.5, so we fall back to the hardcoded directory if it
158 AC_CACHE_CHECK([for $am_display_PYTHON extension module directory],
159 [am_cv_python_pyexecdir],
160 [if test "x$exec_prefix" = xNONE
162 am_py_exec_prefix=$am_py_prefix
164 am_py_exec_prefix=$exec_prefix
166 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 ||
167 echo "$PYTHON_EXEC_PREFIX/lib/python$PYTHON_VERSION/site-packages"`
168 case $am_cv_python_pyexecdir in
170 am__strip_prefix=`echo "$am_py_exec_prefix" | sed 's|.|.|g'`
171 am_cv_python_pyexecdir=`echo "$am_cv_python_pyexecdir" | sed "s,^$am__strip_prefix,$PYTHON_EXEC_PREFIX,"`
174 case $am_py_exec_prefix in
177 am_cv_python_pyexecdir=$PYTHON_EXEC_PREFIX/lib/python$PYTHON_VERSION/site-packages
183 AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])
185 dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
187 AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
189 dnl Run any user-specified action.
196 # AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
197 # ---------------------------------------------------------------------------
198 # Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
199 # Run ACTION-IF-FALSE otherwise.
200 # This test uses sys.hexversion instead of the string equivalent (first
201 # word of sys.version), in order to cope with versions such as 2.2c1.
202 # This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
203 AC_DEFUN([AM_PYTHON_CHECK_VERSION],
205 # split strings by '.' and convert to numeric. Append some zeros
206 # because we need at least 4 digits for the hex conversion.
207 # map returns an iterator in Python 3.0 and a list in 2.x
208 minver = list(map(int, '$2'.split('.'))) + [[0, 0, 0]]
210 # xrange is not present in Python 3.0 and range returns an iterator
211 for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
212 sys.exit(sys.hexversion < minverhex)"
213 AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])