source: trunk/essentials/sys-devel/automake-1.10/m4/python.m4

Last change on this file was 3147, checked in by bird, 18 years ago

automake 1.10
File size: 7.1 KB
Line 
1## ------------------------ -*- Autoconf -*-
2## Python file handling
3## From Andrew Dalke
4## Updated by James Henstridge
5## ------------------------
6# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005
7# Free Software Foundation, Inc.
8#
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.
12
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.
20#
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
24# extension modules.
25#
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).
30#
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.
35AC_DEFUN([AM_PATH_PYTHON],
36 [
37 dnl Find a Python interpreter. Python versions prior to 1.5 are not
38 dnl supported because the default installation locations changed from
39 dnl $prefix/lib/site-python in 1.4 to $prefix/lib/python1.5/site-packages
40 dnl in 1.5.
41 m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
42 [python python2 python2.5 python2.4 python2.3 python2.2 dnl
43python2.1 python2.0 python1.6 python1.5])
44
45 m4_if([$1],[],[
46 dnl No version check is needed.
47 # Find any Python interpreter.
48 if test -z "$PYTHON"; then
49 AC_PATH_PROGS([PYTHON], _AM_PYTHON_INTERPRETER_LIST, :)
50 fi
51 am_display_PYTHON=python
52 ], [
53 dnl A version check is needed.
54 if test -n "$PYTHON"; then
55 # If the user set $PYTHON, use it and don't search something else.
56 AC_MSG_CHECKING([whether $PYTHON version >= $1])
57 AM_PYTHON_CHECK_VERSION([$PYTHON], [$1],
58 [AC_MSG_RESULT(yes)],
59 [AC_MSG_ERROR(too old)])
60 am_display_PYTHON=$PYTHON
61 else
62 # Otherwise, try each interpreter until we find one that satisfies
63 # VERSION.
64 AC_CACHE_CHECK([for a Python interpreter with version >= $1],
65 [am_cv_pathless_PYTHON],[
66 for am_cv_pathless_PYTHON in _AM_PYTHON_INTERPRETER_LIST none; do
67 test "$am_cv_pathless_PYTHON" = none && break
68 AM_PYTHON_CHECK_VERSION([$am_cv_pathless_PYTHON], [$1], [break])
69 done])
70 # Set $PYTHON to the absolute path of $am_cv_pathless_PYTHON.
71 if test "$am_cv_pathless_PYTHON" = none; then
72 PYTHON=:
73 else
74 AC_PATH_PROG([PYTHON], [$am_cv_pathless_PYTHON])
75 fi
76 am_display_PYTHON=$am_cv_pathless_PYTHON
77 fi
78 ])
79
80 if test "$PYTHON" = :; then
81 dnl Run any user-specified action, or abort.
82 m4_default([$3], [AC_MSG_ERROR([no suitable Python interpreter found])])
83 else
84
85 dnl Query Python for its version number. Getting [:3] seems to be
86 dnl the best way to do this; it's what "site.py" does in the standard
87 dnl library.
88
89 AC_CACHE_CHECK([for $am_display_PYTHON version], [am_cv_python_version],
90 [am_cv_python_version=`$PYTHON -c "import sys; print sys.version[[:3]]"`])
91 AC_SUBST([PYTHON_VERSION], [$am_cv_python_version])
92
93 dnl Use the values of $prefix and $exec_prefix for the corresponding
94 dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made
95 dnl distinct variables so they can be overridden if need be. However,
96 dnl general consensus is that you shouldn't need this ability.
97
98 AC_SUBST([PYTHON_PREFIX], ['${prefix}'])
99 AC_SUBST([PYTHON_EXEC_PREFIX], ['${exec_prefix}'])
100
101 dnl At times (like when building shared libraries) you may want
102 dnl to know which OS platform Python thinks this is.
103
104 AC_CACHE_CHECK([for $am_display_PYTHON platform], [am_cv_python_platform],
105 [am_cv_python_platform=`$PYTHON -c "import sys; print sys.platform"`])
106 AC_SUBST([PYTHON_PLATFORM], [$am_cv_python_platform])
107
108
109 dnl Set up 4 directories:
110
111 dnl pythondir -- where to install python scripts. This is the
112 dnl site-packages directory, not the python standard library
113 dnl directory like in previous automake betas. This behavior
114 dnl is more consistent with lispdir.m4 for example.
115 dnl Query distutils for this directory. distutils does not exist in
116 dnl Python 1.5, so we fall back to the hardcoded directory if it
117 dnl doesn't work.
118 AC_CACHE_CHECK([for $am_display_PYTHON script directory],
119 [am_cv_python_pythondir],
120 [am_cv_python_pythondir=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_python_lib(0,0,prefix='$PYTHON_PREFIX')" 2>/dev/null ||
121 echo "$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages"`])
122 AC_SUBST([pythondir], [$am_cv_python_pythondir])
123
124 dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
125 dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
126 dnl more consistent with the rest of automake.
127
128 AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
129
130 dnl pyexecdir -- directory for installing python extension modules
131 dnl (shared libraries)
132 dnl Query distutils for this directory. distutils does not exist in
133 dnl Python 1.5, so we fall back to the hardcoded directory if it
134 dnl doesn't work.
135 AC_CACHE_CHECK([for $am_display_PYTHON extension module directory],
136 [am_cv_python_pyexecdir],
137 [am_cv_python_pyexecdir=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_python_lib(1,0,prefix='$PYTHON_EXEC_PREFIX')" 2>/dev/null ||
138 echo "${PYTHON_EXEC_PREFIX}/lib/python${PYTHON_VERSION}/site-packages"`])
139 AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])
140
141 dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
142
143 AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
144
145 dnl Run any user-specified action.
146 $2
147 fi
148
149])
150
151
152# AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
153# ---------------------------------------------------------------------------
154# Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
155# Run ACTION-IF-FALSE otherwise.
156# This test uses sys.hexversion instead of the string equivalent (first
157# word of sys.version), in order to cope with versions such as 2.2c1.
158# hexversion has been introduced in Python 1.5.2; it's probably not
159# worth to support older versions (1.5.1 was released on October 31, 1998).
160AC_DEFUN([AM_PYTHON_CHECK_VERSION],
161 [prog="import sys, string
162# split strings by '.' and convert to numeric. Append some zeros
163# because we need at least 4 digits for the hex conversion.
164minver = map(int, string.split('$2', '.')) + [[0, 0, 0]]
165minverhex = 0
166for i in xrange(0, 4): minverhex = (minverhex << 8) + minver[[i]]
167sys.exit(sys.hexversion < minverhex)"
168 AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])
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