255 lines
8.1 KiB
Plaintext
255 lines
8.1 KiB
Plaintext
dnl @synopsis AC_PYTHON_DEVEL([version])
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dnl
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dnl Note: Defines as a precious variable "PYTHON_VERSION". Don't
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dnl override it in your configure.ac.
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dnl
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dnl This macro checks for Python and tries to get the include path to
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dnl 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS)
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dnl output variables.
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dnl It also exports $(PYTHON_EXTRA_LIBS) and $(PYTHON_EXTRA_LDFLAGS)
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dnl for embedding Python in your code.
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dnl
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dnl You can search for some particular version of Python by passing a
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dnl parameter to this macro, for example ">= '2.3.1'", or "== '2.4'".
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dnl Please note that you *have* to pass also an operator along
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dnl with the version to match, and pay special attention to the
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dnl single quotes surrounding the version number.
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dnl Don't use "PYTHON_VERSION" for this: that environment variable is
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dnl declared as precious and thus reserved for the end-user.
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dnl
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dnl This macro should work for all versions of Python >= 2.1.0. As
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dnl an end user, you can disable the check for the python version
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dnl by setting the PYTHON_NOVERSIONCHECK environment variable
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dnl to something else than the empty string.
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dnl
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dnl If you need to use this macro for an older Python version, please
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dnl contact the authors. We're always open for feedback.
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dnl
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dnl @category InstalledPackages
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dnl @author Sebastian Huber <sebastian-huber@web.de>
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dnl @author Alan W. Irwin <irwin@beluga.phys.uvic.ca>
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dnl @author Rafael Laboissiere <laboissiere@psy.mpg.de>
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dnl @author Andrew Collier <colliera@nu.ac.za>
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dnl @author Matteo Settenvini <matteo@member.fsf.org>
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dnl @author Horst Knorr <hk_classes@knoda.org>
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dnl @version 2006-02-05
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dnl @license GPLWithACException
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AC_DEFUN([AC_PYTHON_DEVEL],[
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#
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# Allow the use of a (user set) custom python version
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#
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AC_ARG_VAR([PYTHON_VERSION],[The installed Python
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version to use, for example '2.3'. This string
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will be appended to the Python interpreter
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canonical name.])
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AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
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if test -z "$PYTHON"; then
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AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path])
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PYTHON_VERSION=""
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fi
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#
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# Check for a version of Python >= 2.1.0
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#
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AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
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ac_supports_python_ver=`$PYTHON -c "import sys, string; \
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ver = string.split(sys.version)[[0]]; \
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print ver >= '2.1.0'"`
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if test "$ac_supports_python_ver" != "True"; then
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if test -z "$PYTHON_NOVERSIONCHECK"; then
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AC_MSG_RESULT([no])
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AC_MSG_FAILURE([
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This version of the AC@&t@_PYTHON_DEVEL macro
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doesn't work properly with versions of Python before
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2.1.0. You may need to re-run configure, setting the
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variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG,
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PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
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Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
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to something else than an empty string.
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])
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else
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AC_MSG_RESULT([skip at user request])
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fi
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else
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AC_MSG_RESULT([yes])
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fi
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#
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# if the macro parameter ``version'' is set, honour it
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#
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if test -n "$1"; then
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AC_MSG_CHECKING([for a version of Python $1])
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ac_supports_python_ver=`$PYTHON -c "import sys, string; \
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ver = string.split(sys.version)[[0]]; \
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print ver $1"`
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if test "$ac_supports_python_ver" = "True"; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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AC_MSG_ERROR([this package requires Python $1.
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If you have it installed, but it isn't the default Python
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interpreter in your system path, please pass the PYTHON_VERSION
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variable to configure. See ``configure --help'' for reference.
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])
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PYTHON_VERSION=""
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fi
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fi
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#
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# Check if you have distutils, else fail
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#
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AC_MSG_CHECKING([for the distutils Python package])
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ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`
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if test -z "$ac_distutils_result"; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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AC_MSG_ERROR([cannot import Python module "distutils".
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Please check your Python installation. The error was:
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$ac_distutils_result])
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PYTHON_VERSION=""
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fi
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#
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# Check for Python include path
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#
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AC_MSG_CHECKING([for Python include path])
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if test -z "$PYTHON_CPPFLAGS"; then
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python_path=`$PYTHON -c "import distutils.sysconfig; \
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print distutils.sysconfig.get_python_inc();"`
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if test -n "${python_path}"; then
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python_path="-I$python_path"
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fi
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PYTHON_CPPFLAGS=$python_path
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fi
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AC_MSG_RESULT([$PYTHON_CPPFLAGS])
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AC_SUBST([PYTHON_CPPFLAGS])
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#
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# Check for Python library path
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#
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AC_MSG_CHECKING([for Python library path])
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if test -z "$PYTHON_LDFLAGS"; then
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# (makes two attempts to ensure we've got a version number
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# from the interpreter)
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py_version=`$PYTHON -c "from distutils.sysconfig import *; \
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from string import join; \
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print join(get_config_vars('VERSION'))"`
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if test "$py_version" == "[None]"; then
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if test -n "$PYTHON_VERSION"; then
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py_version=$PYTHON_VERSION
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else
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py_version=`$PYTHON -c "import sys; \
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print sys.version[[:3]]"`
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fi
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fi
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PYTHON_LDFLAGS=`$PYTHON -c "from distutils.sysconfig import *; \
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from string import join; \
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print '-L' + get_python_lib(0,1);"`
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# We could have a versioned library, or an unversioned one,
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# even if the second case is discouraged. So, let's check for
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# the versioned one first, and fallback on the second later.
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LIBS="$ac_save_LIBS $PYTHON_LDFLAGS"
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CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
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AC_LANG_PUSH([C])
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AC_CHECK_LIB([python$py_version], [Py_Initialize],
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[PYTHON_LDFLAGS="$PYTHON_LDFLAGS -lpython$py_version"],
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AC_CHECK_LIB([python], [Py_Initialize],
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[PYTHON_LDFLAGS="$PYTHON_LDFLAGS -lpython"],
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[PYTHON_LDFLAGS=""])
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)
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AC_LANG_POP
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if test -z "$PYTHON_LDFLAGS"; then
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AC_MSG_ERROR([
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Could not link test program to Python. Maybe the main Python library has been
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installed in some non-standard library path. If so, pass it to configure,
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via the LDFLAGS environment variable.
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Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
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])
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fi
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CPPFLAGS="$ac_save_CPPFLAGS"
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LIBS="$ac_save_LIBS"
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fi
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AC_MSG_RESULT([$PYTHON_LDFLAGS])
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AC_SUBST([PYTHON_LDFLAGS])
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#
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# Check for site packages
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#
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AC_MSG_CHECKING([for Python site-packages path])
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if test -z "$PYTHON_SITE_PKG"; then
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PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
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print distutils.sysconfig.get_python_lib(0,0);"`
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fi
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AC_MSG_RESULT([$PYTHON_SITE_PKG])
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AC_SUBST([PYTHON_SITE_PKG])
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#
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# libraries which must be linked in when embedding
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#
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AC_MSG_CHECKING(python extra libraries)
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if test -z "$PYTHON_EXTRA_LIBS"; then
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PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
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conf = distutils.sysconfig.get_config_var; \
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print conf('LOCALMODLIBS'), conf('LIBS')"`
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fi
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AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
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AC_SUBST(PYTHON_EXTRA_LIBS)
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#
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# linking flags needed when embedding
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#
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AC_MSG_CHECKING(python extra linking flags)
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if test -z "$PYTHON_EXTRA_LDFLAGS"; then
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PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
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conf = distutils.sysconfig.get_config_var; \
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print conf('LINKFORSHARED')"`
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fi
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AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
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AC_SUBST(PYTHON_EXTRA_LDFLAGS)
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#
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# final check to see if everything compiles alright
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#
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AC_MSG_CHECKING([consistency of all components of python development environment])
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AC_LANG_PUSH([C])
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# save current global flags
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LIBS="$ac_save_LIBS $PYTHON_LDFLAGS"
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CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
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AC_TRY_LINK([
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#include <Python.h>
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],[
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Py_Initialize();
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],[pythonexists=yes],[pythonexists=no])
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AC_MSG_RESULT([$pythonexists])
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if test ! "$pythonexists" = "yes"; then
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AC_MSG_ERROR([
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============================================================================
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ERROR!
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You probably have to install the development version of the Python package
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for your distribution. The exact name of this package varies among them.
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Take also a look to config.log. If everything looks all right, please
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report the problem to the macro maintainer.
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============================================================================
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])
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PYTHON_VERSION=""
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fi
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AC_LANG_POP
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# turn back to default flags
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CPPFLAGS="$ac_save_CPPFLAGS"
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LIBS="$ac_save_LIBS"
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#
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# all done!
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#
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])
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