--- a/build/gtkdoc.m4	Wed Nov 14 16:04:52 2012 +0200
+++ b/build/gtkdoc.m4	Wed Nov 14 16:27:49 2012 +0200
@@ -1,10 +1,20 @@
-# Included so you can build without gtk-doc if it's not installed.
+dnl -*- mode: autoconf -*-
+
+# serial 1
+
 dnl Usage:
 dnl   GTK_DOC_CHECK([minimum-gtk-doc-version])
 AC_DEFUN([GTK_DOC_CHECK],
 [
+  AC_REQUIRE([PKG_PROG_PKG_CONFIG])
   AC_BEFORE([AC_PROG_LIBTOOL],[$0])dnl setup libtool first
   AC_BEFORE([AM_PROG_LIBTOOL],[$0])dnl setup libtool first
+
+  dnl check for tools we added during development
+  AC_PATH_PROG([GTKDOC_CHECK],[gtkdoc-check])
+  AC_PATH_PROGS([GTKDOC_REBASE],[gtkdoc-rebase],[true])
+  AC_PATH_PROG([GTKDOC_MKPDF],[gtkdoc-mkpdf])
+
   dnl for overriding the documentation installation directory
   AC_ARG_WITH([html-dir],
     AS_HELP_STRING([--with-html-dir=PATH], [path to installed docs]),,
@@ -23,14 +33,35 @@
       [PKG_CHECK_EXISTS([gtk-doc],,
                         AC_MSG_ERROR([gtk-doc not installed and --enable-gtk-doc requested]))],
       [PKG_CHECK_EXISTS([gtk-doc >= $1],,
-                        AC_MSG_ERROR([You need to have gtk-doc >= $1 installed to build gtk-doc]))])
+                        AC_MSG_ERROR([You need to have gtk-doc >= $1 installed to build $PACKAGE_NAME]))])
+    dnl don't check for glib if we build glib
+    if test "x$PACKAGE_NAME" != "xglib"; then
+      dnl don't fail if someone does not have glib
+      PKG_CHECK_MODULES(GTKDOC_DEPS, glib-2.0 >= 2.10.0 gobject-2.0  >= 2.10.0,,)
+    fi
   fi
 
   AC_MSG_CHECKING([whether to build gtk-doc documentation])
   AC_MSG_RESULT($enable_gtk_doc)
 
-  AC_PATH_PROGS(GTKDOC_CHECK,gtkdoc-check,)
+  dnl enable/disable output formats
+  AC_ARG_ENABLE([gtk-doc-html],
+    AS_HELP_STRING([--enable-gtk-doc-html],
+                   [build documentation in html format [[default=yes]]]),,
+    [enable_gtk_doc_html=yes])
+    AC_ARG_ENABLE([gtk-doc-pdf],
+      AS_HELP_STRING([--enable-gtk-doc-pdf],
+                     [build documentation in pdf format [[default=no]]]),,
+      [enable_gtk_doc_pdf=no])
+
+  if test -z "$GTKDOC_MKPDF"; then
+    enable_gtk_doc_pdf=no
+  fi
+
 
   AM_CONDITIONAL([ENABLE_GTK_DOC], [test x$enable_gtk_doc = xyes])
+  AM_CONDITIONAL([GTK_DOC_BUILD_HTML], [test x$enable_gtk_doc_html = xyes])
+  AM_CONDITIONAL([GTK_DOC_BUILD_PDF], [test x$enable_gtk_doc_pdf = xyes])
   AM_CONDITIONAL([GTK_DOC_USE_LIBTOOL], [test -n "$LIBTOOL"])
+  AM_CONDITIONAL([GTK_DOC_USE_REBASE], [test -n "$GTKDOC_REBASE"])
 ])