[ocrfeeder] Added some missed Pythn dependencies to the configure.ac file

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit 58c280394af4e6aa780c17cf4fd84a8d50857e10
Author: Juanje Ojeda <jojeda emergya es>
Date:   Wed Mar 9 16:53:14 2011 +0100

    Added some missed Pythn dependencies to the configure.ac file
    
    Removed the library pygtk-2.0-dev from the dependencies because
    there is nothing to compile and added the missing Python modules:
     - gtk
     - pygtk
     - gtkspell
     - goocanvas
     - enchant

 configure.ac              |   13 +++++------
 m4/m4_ax_python_module.m4 |   49 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 7 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 42f0dc8..60b67cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,13 +15,12 @@ AM_SILENT_RULES([yes])
 dnl == check for python ==
 AM_PATH_PYTHON(2.5)
 
-dnl == Library dependencies ==
-PYGTK_REQUIRED=2.16
-
-PKG_CHECK_MODULES(OCRFEEDER, [
-  pygtk-2.0     >= $PYGTK_REQUIRED])
-AC_SUBST(OCRFEEDER_CFLAGS)
-AC_SUBST(OCRFEEDER_LIBS)
+dnl == Python dependencies ==
+AX_PYTHON_MODULE([gtk],[needed])
+AX_PYTHON_MODULE([pygtk],[needed])
+AX_PYTHON_MODULE([gtkspell],[needed])
+AX_PYTHON_MODULE([goocanvas],[needed])
+AX_PYTHON_MODULE([enchant],[needed])
 
 dnl == i18n ==
 GETTEXT_PACKAGE=ocrfeeder
diff --git a/m4/m4_ax_python_module.m4 b/m4/m4_ax_python_module.m4
new file mode 100644
index 0000000..bd70a06
--- /dev/null
+++ b/m4/m4_ax_python_module.m4
@@ -0,0 +1,49 @@
+# ===========================================================================
+#     http://www.gnu.org/software/autoconf-archive/ax_python_module.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PYTHON_MODULE(modname[, fatal])
+#
+# DESCRIPTION
+#
+#   Checks for Python module.
+#
+#   If fatal is non-empty then absence of a module will trigger an error.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Andrew Collier <colliera ukzn ac za>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 5
+
+AU_ALIAS([AC_PYTHON_MODULE], [AX_PYTHON_MODULE])
+AC_DEFUN([AX_PYTHON_MODULE],[
+    if test -z $PYTHON;
+    then
+        PYTHON="python"
+    fi
+    PYTHON_NAME=`basename $PYTHON`
+    AC_MSG_CHECKING($PYTHON_NAME module: $1)
+	$PYTHON -c "import $1" 2>/dev/null
+	if test $? -eq 0;
+	then
+		AC_MSG_RESULT(yes)
+		eval AS_TR_CPP(HAVE_PYMOD_$1)=yes
+	else
+		AC_MSG_RESULT(no)
+		eval AS_TR_CPP(HAVE_PYMOD_$1)=no
+		#
+		if test -n "$2"
+		then
+			AC_MSG_ERROR(failed to find required module $1)
+			exit 1
+		fi
+	fi
+])