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dnl as-python.m4 0.1.1
dnl autostars m4 macro for python checks
dnl From Andrew Dalke
dnl Updated by James Henstridge
dnl Updated by Andy Wingo to loop through possible pythons
dnl Updated by Thomas Vander Stichele to check for presence of packages/modules
dnl $Id: as-python.m4,v 1.3 2006/02/28 16:49:31 thomasvs Exp $
# AS_PATH_PYTHON([MINIMUM-VERSION])
# 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, AS_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.
# Updated to loop over all possible python binaries by Andy Wingo
# <wingo@pobox.com>
AC_DEFUN([AS_PATH_PYTHON],
[
dnl Find a version of Python. I could check for python versions 1.4
dnl or earlier, but 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, and I don't want to maintain that logic.
dnl should we do the version check?
ifelse([$1],[],
[AC_PATH_PROG(PYTHON, python python2.1 python2.0 python1.6 python1.5)],
[
AC_MSG_NOTICE(Looking for Python version >= $1)
changequote(<<, >>)dnl
prog="
import sys, string
minver = '$1'
pyver = string.split(sys.version)[0] # first word is version string
# split strings by '.'. just compare textually to allow for versions like
# 2.4.1a0
minver = string.split(minver, '.')
pyver = string.split(pyver, '.')
# we can now do comparisons on the two lists:
if pyver >= minver:
sys.exit(0)
else:
sys.exit(1)"
changequote([, ])dnl
python_good=false
for python_candidate in python python2.2 python2.1 python2.0 python2 python1.6 python1.5; do
unset PYTHON
AC_PATH_PROG(PYTHON, $python_candidate) 1> /dev/null 2> /dev/null
if test "x$PYTHON" = "x"; then continue; fi
if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC; then
AC_MSG_CHECKING(["$PYTHON":])
AC_MSG_RESULT([okay])
python_good=true
break;
else
dnl clear the cache val
unset ac_cv_path_PYTHON
fi
done
])
if test "$python_good" != "true"; then
AC_MSG_ERROR([No suitable version of python found])
fi
AC_MSG_CHECKING([local Python configuration])
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. Need to change quote character because of [:3]
AC_SUBST(PYTHON_VERSION)
changequote(<<, >>)dnl
PYTHON_VERSION=`$PYTHON -c "import sys; print sys.version[:3]"`
changequote([, ])dnl
dnl Use the values of $prefix and $exec_prefix for the corresponding
dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made
dnl distinct variables so they can be overridden if need be. However,
dnl general consensus is that you shouldn't need this ability.
AC_SUBST(PYTHON_PREFIX)
PYTHON_PREFIX='${prefix}'
AC_SUBST(PYTHON_EXEC_PREFIX)
PYTHON_EXEC_PREFIX='${exec_prefix}'
dnl At times (like when building shared libraries) you may want
dnl to know which OS platform Python thinks this is.
AC_SUBST(PYTHON_PLATFORM)
PYTHON_PLATFORM=`$PYTHON -c "import sys; print sys.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 behaviour
dnl is more consistent with lispdir.m4 for example.
dnl
dnl Also, if the package prefix isn't the same as python's prefix,
dnl then the old $(pythondir) was pretty useless.
AC_SUBST(pythondir)
pythondir=$PYTHON_PREFIX"/lib/python"$PYTHON_VERSION/site-packages
dnl pkgpythondir -- $PACKAGE directory under pythondir. Was
dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is
dnl more consistent with the rest of automake.
dnl Maybe this should be put in python.am?
AC_SUBST(pkgpythondir)
pkgpythondir=\${pythondir}/$PACKAGE
dnl pyexecdir -- directory for installing python extension modules
dnl (shared libraries) Was PYTHON_SITE_EXEC in previous betas.
AC_SUBST(pyexecdir)
pyexecdir=$PYTHON_EXEC_PREFIX"/lib/python"$PYTHON_VERSION/site-packages
dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
dnl Maybe this should be put in python.am?
AC_SUBST(pkgpyexecdir)
pkgpyexecdir=\${pyexecdir}/$PACKAGE
AC_MSG_RESULT([looks good])
])
dnl AS_PYTHON_IMPORT(PACKAGE/MODULE, [ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND, [PREAMBLE, [POSTAMBLE]]]])
dnl Try to import the given PACKAGE/MODULE
AC_DEFUN([AS_PYTHON_IMPORT],
[
dnl Check if we can import a given module.
dnl Requires AS_PATH_PYTHON to be called before.
dnl PREAMBLE and POSTAMBLE, if given, is code executed right before and after
dnl the import
AC_MSG_CHECKING([for python module $1])
prog="
import sys
try:
$4
import $1
$5
sys.exit(0)
except ImportError:
sys.exit(1)
except SystemExit:
raise
except Exception, e:
print ' Error while trying to import $1:'
print ' %r: %s' % (e, e)
sys.exit(1)"
if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC
then
AC_MSG_RESULT(found)
ifelse([$2], , :, [$2])
else
AC_MSG_RESULT(not found)
ifelse([$3], , :, [$3])
fi
])
dnl a macro to check for ability to create python extensions
dnl AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
dnl function also defines PYTHON_INCLUDES
AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
[
AC_REQUIRE([AM_PATH_PYTHON])
AC_MSG_CHECKING(for headers required to compile python extensions)
dnl deduce PYTHON_INCLUDES
py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
if test "$py_prefix" != "$py_exec_prefix"; then
PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
fi
AC_SUBST(PYTHON_INCLUDES)
dnl check if the headers exist:
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
AC_TRY_CPP([#include <Python.h>],dnl
[AC_MSG_RESULT(found)
$1],dnl
[AC_MSG_RESULT(not found)
$2])
CPPFLAGS="$save_CPPFLAGS"
])
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