1 ## ------------------------ -*- Autoconf -*-
2 ## Python file handling
4 ## Updated by James Henstridge
5 ## ------------------------
6 # Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005
7 # 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.
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 1.5 are not
38 dnl supported because the default installation locations changed from
39 dnl $prefix/lib/site-python in 1.4 to $prefix/lib/python1.5/site-packages
41 m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
42 [python python2 python2.4 python2.3 python2.2 dnl
43 python2.1 python2.0 python1.6 python1.5])
46 dnl No version check is needed.
47 # Find any Python interpreter.
48 if test -z "$PYTHON"; then
49 AC_PATH_PROGS([PYTHON], _AM_PYTHON_INTERPRETER_LIST, :)
51 am_display_PYTHON=python
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], [$1],
59 [AC_MSG_ERROR(too old)])
60 am_display_PYTHON=$PYTHON
62 # Otherwise, try each interpreter until we find one that satisfies
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])
70 # Set $PYTHON to the absolute path of $am_cv_pathless_PYTHON.
71 if test "$am_cv_pathless_PYTHON" = none; then
74 AC_PATH_PROG([PYTHON], [$am_cv_pathless_PYTHON])
76 am_display_PYTHON=$am_cv_pathless_PYTHON
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])])
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
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])
93 dnl Use the values of $prefix and $exec_prefix for the corresponding
94 dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made
95 dnl distinct variables so they can be overridden if need be. However,
96 dnl general consensus is that you shouldn't need this ability.
98 AC_SUBST([PYTHON_PREFIX], ['${prefix}'])
99 AC_SUBST([PYTHON_EXEC_PREFIX], ['${exec_prefix}'])
101 dnl At times (like when building shared libraries) you may want
102 dnl to know which OS platform Python thinks this is.
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])
109 dnl Set up 4 directories:
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
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])
124 dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
125 dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
126 dnl more consistent with the rest of automake.
128 AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])
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
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])
141 dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
143 AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])
145 dnl Run any user-specified action.
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).
160 AC_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.
164 minver = map(int, string.split('$2', '.')) + [[0, 0, 0]]
166 for i in xrange(0, 4): minverhex = (minverhex << 8) + minver[[i]]
167 sys.exit(sys.hexversion < minverhex)"
168 AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])