~drizzle-trunk/drizzle/development

dnl -*- mode: m4; c-basic-offset: 2; indent-tabs-mode: nil; -*-

dnl vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

dnl   

dnl pandora-build: A pedantic build system

dnl

dnl   Copyright (C) 2009 Sun Microsystems, Inc.

dnl   Copyright (c) 2008 Sebastian Huber <sebastian-huber@web.de>

dnl   Copyright (c) 2008 Alan W. Irwin <irwin@beluga.phys.uvic.ca>

dnl   Copyright (c) 2008 Rafael Laboissiere <rafael@laboissiere.net>

dnl   Copyright (c) 2008 Andrew Collier <colliera@ukzn.ac.za>

dnl   Copyright (c) 2008 Matteo Settenvini <matteo@member.fsf.org>

dnl   Copyright (c) 2008 Horst Knorr <hk_classes@knoda.org>

dnl

dnl   This program is free software: you can redistribute it and/or modify it

dnl   under the terms of the GNU General Public License as published by the

dnl   Free Software Foundation, either version 3 of the License, or (at your

dnl   option) any later version.

dnl

dnl   This program is distributed in the hope that it will be useful, but

dnl   WITHOUT ANY WARRANTY; without even the implied warranty of

dnl   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General

dnl   Public License for more details.

dnl

dnl   You should have received a copy of the GNU General Public License along

dnl   with this program. If not, see <http://www.gnu.org/licenses/>.

dnl

dnl   As a special exception, the respective Autoconf Macro's copyright owner

dnl   gives unlimited permission to copy, distribute and modify the configure

dnl   scripts that are the output of Autoconf when processing the Macro. You

dnl   need not follow the terms of the GNU General Public License when using

dnl   or distributing such scripts, even though portions of the text of the

dnl   Macro appear in them. The GNU General Public License (GPL) does govern

dnl   all other use of the material that constitutes the Autoconf Macro.

dnl

dnl   This special exception to the GPL applies to versions of the Autoconf

dnl   Macro released by the Autoconf Macro Archive. When you make and

dnl   distribute a modified version of the Autoconf Macro, you may extend this

dnl   special exception to the GPL to apply to your modified version as well.

dnl SYNOPSIS

dnl

dnl   PANDORA_PYTHON3_DEVEL([version])

dnl

dnl DESCRIPTION

dnl

dnl   Note: Defines as a precious variable "PYTHON3_VERSION". Don't override it

dnl   in your configure.ac.

dnl

dnl   This macro checks for Python and tries to get the include path to

dnl   'Python.h'. It provides the $(PYTHON3_CPPFLAGS) and $(PYTHON3_LDFLAGS)

dnl   output variables. It also exports $(PYTHON3_EXTRA_LIBS) and

dnl   $(PYTHON3_EXTRA_LDFLAGS) for embedding Python in your code.

dnl

dnl   You can search for some particular version of Python by passing a

dnl   parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please

dnl   note that you *have* to pass also an operator along with the version to

dnl   match, and pay special attention to the single quotes surrounding the

dnl   version number. Don't use "PYTHON3_VERSION" for this: that environment

dnl   variable is declared as precious and thus reserved for the end-user.

dnl

dnl LAST MODIFICATION

dnl

dnl   2009-08-23

AC_DEFUN([PANDORA_PYTHON3_DEVEL],[

	#

	# Allow the use of a (user set) custom python version

	#

	AC_ARG_VAR([PYTHON3_VERSION],[The installed Python

		version to use, for example '3.0'. This string

		will be appended to the Python interpreter

		canonical name.])

  AS_IF([test -z "$PYTHON3"],[

  	AC_PATH_PROG([PYTHON3],[python[$PYTHON3_VERSION]])

  ])

	AS_IF([test -z "$PYTHON3"],[

	  AC_MSG_ERROR([Cannot find python$PYTHON3_VERSION in your system path])

	  PYTHON3_VERSION=""

  ])

	#

	# if the macro parameter ``version'' is set, honour it

	#

	if test -n "$1"; then

		AC_MSG_CHECKING([for a version of Python $1])

		ac_supports_python3_ver=`$PYTHON3 -c "import sys, string; \

			ver = string.split(sys.version)[[0]]; \

			print(ver $1)"`

		if test "$ac_supports_python3_ver" = "True"; then

	   	   AC_MSG_RESULT([yes])

		else

			AC_MSG_RESULT([no])

			AC_MSG_ERROR([this package requires Python $1.

If you have it installed, but it isn't the default Python

interpreter in your system path, please pass the PYTHON3_VERSION

variable to configure. See ``configure --help'' for reference.

])

			PYTHON_VERSION=""

		fi

	fi

	#

	# Check if you have distutils, else fail

	#

	AC_MSG_CHECKING([for Python3 distutils package])

	ac_python3_distutils_result=`$PYTHON3 -c "import distutils" 2>&1`

	if test -z "$ac_python3_distutils_result"; then

		AC_MSG_RESULT([yes])

	else

		AC_MSG_RESULT([no])

		AC_MSG_ERROR([cannot import Python3 module "distutils".

Please check your Python3 installation. The error was:

$ac_python3_distutils_result])

		PYTHON3_VERSION=""

	fi

	#

	# Check for Python include path

	#

	AC_MSG_CHECKING([for Python3 include path])

	if test -z "$PYTHON3_CPPFLAGS"; then

		python3_path=`$PYTHON3 -c "import distutils.sysconfig; \

           		print(distutils.sysconfig.get_python_inc());"`

		if test -n "${python3_path}"; then

		   	python3_path="-I$python3_path"

		fi

		PYTHON3_CPPFLAGS=$python3_path

	fi

	AC_MSG_RESULT([$PYTHON3_CPPFLAGS])

	AC_SUBST([PYTHON3_CPPFLAGS])

	#

	# Check for Python library path

	#

	AC_MSG_CHECKING([for Python3 library path])

	if test -z "$PYTHON3_LDFLAGS"; then

		# (makes two attempts to ensure we've got a version number

		# from the interpreter)

		py3_version=`$PYTHON3 -c "from distutils.sysconfig import *; \

			print(' '.join(get_config_vars('VERSION')))"`

		if test "$py3_version" == "[None]"; then

			if test -n "$PYTHON3_VERSION"; then

				py3_version=$PYTHON3_VERSION

			else

				py3_version=`$PYTHON3 -c "import sys; \

					print(sys.version[[:3]])"`

			fi

		fi

		PYTHON3_LDFLAGS=`$PYTHON3 -c "from distutils.sysconfig import *; \

			print('-L' + get_python_lib(0,1), \

		      	'-lpython');"`$py3_version

	fi

	AC_MSG_RESULT([$PYTHON3_LDFLAGS])

	AC_SUBST([PYTHON3_LDFLAGS])

	#

	# Check for site packages

	#

	AC_MSG_CHECKING([for Python3 site-packages path])

	if test -z "$PYTHON3_SITE_PKG"; then

		PYTHON3_SITE_PKG=`$PYTHON3 -c "import distutils.sysconfig; \

		        print(distutils.sysconfig.get_python_lib(0,0));"`

	fi

	AC_MSG_RESULT([$PYTHON3_SITE_PKG])

	AC_SUBST([PYTHON3_SITE_PKG])

	#

	# libraries which must be linked in when embedding

	#

	AC_MSG_CHECKING(for Python3 embedding libraries)

	if test -z "$PYTHON3_EMBED_LIBS"; then

	   PYTHON3_EMBED_LIBS=`$PYTHON3 -c "import distutils.sysconfig; \

                conf = distutils.sysconfig.get_config_var; \

                print(conf('LOCALMODLIBS'), conf('LIBS'))"`

	fi

	AC_MSG_RESULT([$PYTHON3_EMBED_LIBS])

	AC_SUBST(PYTHON3_EMBED_LIBS)

	#

	# linking flags needed when embedding

	#

	AC_MSG_CHECKING(for Python3 embedding linking flags)

	if test -z "$PYTHON3_EMBED_LDFLAGS"; then

		PYTHON3_EMBED_LDFLAGS=`$PYTHON3 -c "import distutils.sysconfig; \

			conf = distutils.sysconfig.get_config_var; \

			print(conf('LINKFORSHARED'))"`

	fi

	AC_MSG_RESULT([$PYTHON3_EMBED_LDFLAGS])

	AC_SUBST(PYTHON3_EMBED_LDFLAGS)

	#

	# final check to see if everything compiles alright

	#

	AC_MSG_CHECKING([for Python3 development environment consistency])

	AC_LANG_PUSH([C])

	# save current global flags

  ac_save_LIBS="$LIBS"

  ac_save_CPPFLAGS="$CPPFLAGS"

	LIBS="$ac_save_LIBS $PYTHON3_LDFLAGS"

	CPPFLAGS="$ac_save_CPPFLAGS $PYTHON3_CPPFLAGS"

	AC_TRY_LINK([

		#include <Python.h>

	],[

		Py_Initialize();

	],[python3exists=yes],[python3exists=no])

	AC_MSG_RESULT([$python3exists])

        if test ! "$python3exists" = "yes"; then

	   AC_MSG_WARN([

  Could not link test program to Python3.

  Maybe the main Python3 library has been installed in some non-standard

  library path. If so, pass it to configure, via the LDFLAGS environment

  variable.

  Example: ./configure LDFLAGS="-L/usr/non-standard-path/python3/lib"

  ============================================================================

   ERROR!

   You probably have to install the development version of the Python3 package

   for your distribution.  The exact name of this package varies among them.

  ============================================================================

	   ])

	  PYTHON3_VERSION=""

	fi

	AC_LANG_POP

	# turn back to default flags

	CPPFLAGS="$ac_save_CPPFLAGS"

	LIBS="$ac_save_LIBS"

	#

	# all done!

	#

])