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| 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. |
| 35 | +AC_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 |
| 43 | +python2.1 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). |
| 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]] |
| 165 | +minverhex = 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])]) |
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