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 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])
112 dnl Set up 4 directories:
114 dnl pythondir -- where to install python scripts. This is the
115 dnl site-packages directory, not the python standard library
116 dnl directory like in previous automake betas. This behavior
117 dnl is more consistent with lispdir.m4 for example.
118 dnl Query distutils for this directory.
119 AC_CACHE_CHECK([for $am_display_PYTHON script directory],
120 [am_cv_python_pythondir],
121 [if test "x$prefix" = xNONE
123 am_py_prefix=$ac_default_prefix
127 am_cv_python_pythondir=`$PYTHON -c "import sys; from distutils import sysconfig; sys.stdout.write(sysconfig.get_python_lib(0,0,prefix='$am_py_prefix'))" 2>/dev/null`
128 case $am_cv_python_pythondir in
130 am__strip_prefix=`echo "$am_py_prefix" | sed 's|.|.|g'`
131 am_cv_python_pythondir=`echo "$am_cv_python_pythondir" | sed "s,^$am__strip_prefix,$PYTHON_PREFIX,"`
134 case $am_py_prefix in
137 am_cv_python_pythondir=$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages
143 AC_SUBST([pythondir], [$am_cv_python_pythondir])
145 dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
146 dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
147 dnl more consistent with the rest of automake.
149 AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
151 dnl pyexecdir -- directory for installing python extension modules
152 dnl (shared libraries)
153 dnl Query distutils for this directory.
154 AC_CACHE_CHECK([for $am_display_PYTHON extension module directory],
155 [am_cv_python_pyexecdir],
156 [if test "x$exec_prefix" = xNONE
158 am_py_exec_prefix=$am_py_prefix
160 am_py_exec_prefix=$exec_prefix
162 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`
163 case $am_cv_python_pyexecdir in
165 am__strip_prefix=`echo "$am_py_exec_prefix" | sed 's|.|.|g'`
166 am_cv_python_pyexecdir=`echo "$am_cv_python_pyexecdir" | sed "s,^$am__strip_prefix,$PYTHON_EXEC_PREFIX,"`
169 case $am_py_exec_prefix in
172 am_cv_python_pyexecdir=$PYTHON_EXEC_PREFIX/lib/python$PYTHON_VERSION/site-packages
178 AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])
180 dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
182 AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
184 dnl Run any user-specified action.
191 # AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
192 # ---------------------------------------------------------------------------
193 # Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
194 # Run ACTION-IF-FALSE otherwise.
195 # This test uses sys.hexversion instead of the string equivalent (first
196 # word of sys.version), in order to cope with versions such as 2.2c1.
197 # This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
198 AC_DEFUN([AM_PYTHON_CHECK_VERSION],
200 # split strings by '.' and convert to numeric. Append some zeros
201 # because we need at least 4 digits for the hex conversion.
202 # map returns an iterator in Python 3.0 and a list in 2.x
203 minver = list(map(int, '$2'.split('.'))) + [[0, 0, 0]]
205 # xrange is not present in Python 3.0 and range returns an iterator
206 for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
207 sys.exit(sys.hexversion < minverhex)"
208 AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])