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## ------------------------ -*- Autoconf -*-

## Python file handling

## From Andrew Dalke

## Updated by James Henstridge

## ------------------------

# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005

# Free Software Foundation, Inc.

#

# This file is free software; the Free Software Foundation

# gives unlimited permission to copy and/or distribute it,

# with or without modifications, as long as this notice is preserved.

# AM_PATH_PYTHON([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

# ---------------------------------------------------------------------------

# Adds support for distributing Python modules and packages. To

# install modules, copy them to $(pythondir), using the python_PYTHON

# automake variable. To install a package with the same name as the

# automake package, install to $(pkgpythondir), or use the

# pkgpython_PYTHON automake variable.

#

# The variables $(pyexecdir) and $(pkgpyexecdir) are provided as

# locations to install python extension modules (shared libraries).

# Another macro is required to find the appropriate flags to compile

# extension modules.

#

# If your package is configured with a different prefix to python,

# users will have to add the install directory to the PYTHONPATH

# environment variable, or create a .pth file (see the python

# documentation for details).

#

# If the MINIMUM-VERSION argument is passed, AM_PATH_PYTHON will

# cause an error if the version of python installed on the system

# doesn't meet the requirement. MINIMUM-VERSION should consist of

# numbers and dots only.

AC_DEFUN([AM_PATH_PYTHON],

[

dnl Find a Python interpreter. Python versions prior to 1.5 are not

dnl supported because the default installation locations changed from

dnl $prefix/lib/site-python in 1.4 to $prefix/lib/python1.5/site-packages

dnl in 1.5.

m4_define_default([_AM_PYTHON_INTERPRETER_LIST],

[python python2 python2.5 python2.4 python2.3 python2.2 dnl

python2.1 python2.0 python1.6 python1.5])

m4_if([$1],[],[

dnl No version check is needed.

# Find any Python interpreter.

if test -z "$PYTHON"; then

AC_PATH_PROGS([PYTHON], _AM_PYTHON_INTERPRETER_LIST, :)

fi

am_display_PYTHON=python

], [

dnl A version check is needed.

if test -n "$PYTHON"; then

# If the user set $PYTHON, use it and don't search something else.

AC_MSG_CHECKING([whether $PYTHON version >= $1])

AM_PYTHON_CHECK_VERSION([$PYTHON], [$1],

[AC_MSG_RESULT(yes)],

[AC_MSG_ERROR(too old)])

am_display_PYTHON=$PYTHON

else

# Otherwise, try each interpreter until we find one that satisfies

# VERSION.

AC_CACHE_CHECK([for a Python interpreter with version >= $1],

[am_cv_pathless_PYTHON],[

for am_cv_pathless_PYTHON in _AM_PYTHON_INTERPRETER_LIST none; do

test "$am_cv_pathless_PYTHON" = none && break

AM_PYTHON_CHECK_VERSION([$am_cv_pathless_PYTHON], [$1], [break])

done])

# Set $PYTHON to the absolute path of $am_cv_pathless_PYTHON.

if test "$am_cv_pathless_PYTHON" = none; then

PYTHON=:

else

AC_PATH_PROG([PYTHON], [$am_cv_pathless_PYTHON])

fi

am_display_PYTHON=$am_cv_pathless_PYTHON

fi

])

if test "$PYTHON" = :; then

dnl Run any user-specified action, or abort.

m4_default([$3], [AC_MSG_ERROR([no suitable Python interpreter found])])

else

dnl Query Python for its version number. Getting [:3] seems to be

dnl the best way to do this; it's what "site.py" does in the standard

dnl library.

AC_CACHE_CHECK([for $am_display_PYTHON version], [am_cv_python_version],

[am_cv_python_version=`$PYTHON -c "import sys; print sys.version[[:3]]"`])

AC_SUBST([PYTHON_VERSION], [$am_cv_python_version])

dnl Use the values of $prefix and $exec_prefix for the corresponding

dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made

dnl distinct variables so they can be overridden if need be. However,

dnl general consensus is that you shouldn't need this ability.

AC_SUBST([PYTHON_PREFIX], ['${prefix}'])

AC_SUBST([PYTHON_EXEC_PREFIX], ['${exec_prefix}'])

dnl At times (like when building shared libraries) you may want

dnl to know which OS platform Python thinks this is.

AC_CACHE_CHECK([for $am_display_PYTHON platform], [am_cv_python_platform],

[am_cv_python_platform=`$PYTHON -c "import sys; print sys.platform"`])

AC_SUBST([PYTHON_PLATFORM], [$am_cv_python_platform])

dnl Set up 4 directories:

dnl pythondir -- where to install python scripts. This is the

dnl site-packages directory, not the python standard library

dnl directory like in previous automake betas. This behavior

dnl is more consistent with lispdir.m4 for example.

dnl Query distutils for this directory. distutils does not exist in

dnl Python 1.5, so we fall back to the hardcoded directory if it

dnl doesn't work.

AC_CACHE_CHECK([for $am_display_PYTHON script directory],

[am_cv_python_pythondir],

[am_cv_python_pythondir=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_python_lib(0,0,prefix='$PYTHON_PREFIX')" 2>/dev/null ||

echo "$PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages"`])

AC_SUBST([pythondir], [$am_cv_python_pythondir])

dnl pkgpythondir -- $PACKAGE directory under pythondir. Was

dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is

dnl more consistent with the rest of automake.

AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])

dnl pyexecdir -- directory for installing python extension modules

dnl (shared libraries)

dnl Query distutils for this directory. distutils does not exist in

dnl Python 1.5, so we fall back to the hardcoded directory if it

dnl doesn't work.

AC_CACHE_CHECK([for $am_display_PYTHON extension module directory],

[am_cv_python_pyexecdir],

[am_cv_python_pyexecdir=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_python_lib(1,0,prefix='$PYTHON_EXEC_PREFIX')" 2>/dev/null ||

echo "${PYTHON_EXEC_PREFIX}/lib/python${PYTHON_VERSION}/site-packages"`])

AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])

dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)

AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])

dnl Run any user-specified action.

$2

fi

])

# AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])

# ---------------------------------------------------------------------------

# Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.

# Run ACTION-IF-FALSE otherwise.

# This test uses sys.hexversion instead of the string equivalent (first

# word of sys.version), in order to cope with versions such as 2.2c1.

# hexversion has been introduced in Python 1.5.2; it's probably not

# worth to support older versions (1.5.1 was released on October 31, 1998).

AC_DEFUN([AM_PYTHON_CHECK_VERSION],

[prog="import sys, string

# split strings by '.' and convert to numeric. Append some zeros

# because we need at least 4 digits for the hex conversion.

minver = map(int, string.split('$2', '.')) + [[0, 0, 0]]

minverhex = 0

for i in xrange(0, 4): minverhex = (minverhex << 8) + minver[[i]]

sys.exit(sys.hexversion < minverhex)"

AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])