[libchamplain] update m4/gtk-doc.m4

[Pierre-Luc Beaudoin <plbeaudoin src gnome org>]

commit d98afec4ec14e72a0bf482fef282e3b1b0d30902
Author: Simon Wenner <simon wenner ch>
Date:   Thu Feb 25 17:40:05 2010 +0100

    update m4/gtk-doc.m4

 m4/gtk-doc.m4 |   26 ++++++++++++++++++++++++--
 1 files changed, 24 insertions(+), 2 deletions(-)
---
diff --git a/m4/gtk-doc.m4 b/m4/gtk-doc.m4
index bfdfa1d..2cfa1e7 100644
--- a/m4/gtk-doc.m4
+++ b/m4/gtk-doc.m4
@@ -8,6 +8,12 @@ AC_DEFUN([GTK_DOC_CHECK],
 [
   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]),,
@@ -26,14 +32,30 @@ AC_DEFUN([GTK_DOC_CHECK],
       [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]))])
   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"])
 ])