dnl
dnl Copyright 2003,2004,2005 Free Software Foundation, Inc.
dnl 
dnl This file is part of GNU Radio
dnl 
dnl GNU Radio is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3, or (at your option)
dnl any later version.
dnl 
dnl GNU Radio is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl 
dnl You should have received a copy of the GNU General Public License
dnl along with GNU Radio; see the file COPYING.  If not, write to
dnl the Free Software Foundation, Inc., 51 Franklin Street,
dnl Boston, MA 02110-1301, USA.
dnl 

# PYTHON_DEVEL()
#
# Checks for Python and tries to get the include path to 'Python.h'.
# It sets the $(PYTHON_CPPFLAGS), $(PYTHON_LDFLAGS) and $(pythondir) output variables,
#
AC_DEFUN([PYTHON_DEVEL],[
	AC_REQUIRE([AM_PATH_PYTHON])
	AC_REQUIRE([AC_CANONICAL_HOST])

	AC_ARG_WITH(pythondir,
                    AC_HELP_STRING([--with-pythondir=DIR], 
                       [python installation directory (cross-compiling) [[default=$prefix/lib/python2.5/site-packages]]]),
		    [with_pythondir=${withval}],[with_pythondir=${prefix}/lib/python2.5/site-packages])

	# if we're cross-compiling, asking the host python about any of
	# this is completely useless...

	if test x$cross_compiling != xno
	then
		pythondir=$with_pythondir
		pyexecdir=$with_pythondir
		AC_SUBST(PYTHON_CPPFLAGS)
		AC_SUBST(PYTHON_LDFLAGS)
        else

	    # For Fedora Core 5 and 6, see ticket:39 in Trac
	    if test -f '/etc/redhat-release'; then
		    if  (echo $pyexecdir | grep -q lib64); then
			    pythondir="$pyexecdir"
		    fi
	    else
		# Let Python tell us where the install directory is;
		# i.e., don't trust AM_PATH_PYTHON
		python_cmd='
import distutils.sysconfig
import os
path = distutils.sysconfig.get_python_lib()
pypath = distutils.sysconfig.get_config_var("exec_prefix")
path = path.split(pypath)[[1]]
if os.sep == "\\":
  path = path.replace("\\", "/")
print path
'
		pyexecdir=$prefix`$PYTHON -c "$python_cmd"`
		pythondir=$pyexecdir
		
	    fi

	    # Check for Python include path
	    AC_MSG_CHECKING([for Python include path])
	    if test -z "$PYTHON" ; then
		    AC_MSG_ERROR([cannot find Python path])
	    fi

	    # ask distutils which include path we should use
	    python_cmd='
import distutils.sysconfig
import os
path = distutils.sysconfig.get_python_inc(plat_specific=False)
if os.sep == "\\":
  path = path.replace("\\", "/")
print path
'
	    python_path=`$PYTHON -c "$python_cmd"`
	    AC_MSG_RESULT([$python_path])
	    if test -z "$python_path" ; then
		    AC_MSG_ERROR([cannot find Python include path])
	    fi

	    AC_SUBST(PYTHON_CPPFLAGS,[-I$python_path])

	    # Check for Python headers usability
	    python_save_CPPFLAGS=$CPPFLAGS
	    CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
	    AC_CHECK_HEADERS([Python.h], [],
			    [AC_MSG_ERROR([cannot find usable Python headers])])
	    CPPFLAGS="$python_save_CPPFLAGS"

	    # Only set this on mingw and cygwin hosts, (only implemented
	    # for mingw host, for crosscompiling you need to trick this)

	    PYTHON_LDFLAGS=""
	    case $host_os in
		 *mingw* | *cygwin* )
	      AC_MSG_CHECKING([for Python LDFLAGS])

	    python_cmd='
import distutils.sysconfig
import os
path = distutils.sysconfig.get_config_var("LIBPL")
if path == None:
  path = distutils.sysconfig.PREFIX + "/libs"
if os.sep == "\\":
  path = path.replace("\\", "/")
print path
'
	      python_stdlib_path=`$PYTHON -c "$python_cmd"`

	      python_version_nodot=`echo $PYTHON_VERSION | sed "s,\.,,"`
	      libpython_name="python$PYTHON_VERSION"

	      # Standard install of python for win32 has libpython24.a
	      # instead of libpython2.4.a so we check for the library
	      # without the dot in the version number.

	      python_stdlib_filename=`find $python_stdlib_path -type f -name libpython$python_version_nodot.* -print | sed "1q"`
	      if test -n "$python_stdlib_filename" ; then
		    libpython_name="python$python_version_nodot"
	      fi

	      PYTHON_LDFLAGS="-L$python_stdlib_path -l$libpython_name"
	      AC_MSG_RESULT($PYTHON_LDFLAGS) 
	      # Replace all backslashes in PYTHON Paths with forward slashes
	      pythondir=`echo $pythondir |sed 's,\\\\,/,g'`
	      pkgpythondir=`echo $pkgpythondir |sed 's,\\\\,/,g'`
	      pyexecdir=`echo $pyexecdir |sed 's,\\\\,/,g'`
	      pkgpyexecdir=`echo $pkgpyexecdir |sed 's,\\\\,/,g'`
	      ;;
	    esac

	    case $host_os in
		 *mingw* )
	      # Python 2.5 requires ".pyd" instead of ".dll" for extensions
	      PYTHON_LDFLAGS="-shrext .pyd ${PYTHON_LDFLAGS}"
	    esac

	    AC_SUBST(PYTHON_LDFLAGS)
	fi
])

# PYTHON_CHECK_MODULE
#
# Determines if a particular Python module can be imported
#
# $1 - module name
# $2 - module description
# $3 - action if found
# $4 - action if not found
# $5 - test command

AC_DEFUN([PYTHON_CHECK_MODULE],[
    AC_MSG_CHECKING([for $2])
    dnl ########################################
    dnl # import and test checking
    dnl ########################################
    if test "$5"; then
        python_cmd='
try:
    import $1
    assert $5
except ImportError, AssertionError: exit(1)
except: pass'
    dnl ########################################
    dnl # import checking only
    dnl ########################################
    else
        python_cmd='
try: import $1
except ImportError: exit(1)
except: pass'
    fi
    if ! $PYTHON -c "$python_cmd" 2> /dev/null; then
        AC_MSG_RESULT([no])
        $4
    else
        AC_MSG_RESULT([yes])
        $3
    fi
])