Bug 285307 - upstream patch to check that a cairo font backend was

configured.  r=tor

gfx/cairo/README

@@ -15,4 +15,6 @@ PATCHES:
     tend to blend towards opaque the more that is drawn.  Short term
     inefficient workaround of clearing the buffer on each set.
 
+  font-backend.diff - upstream patch to configure.in to make sure
+    that a font backend is available.
 

gfx/cairo/cairo/configure

@@ -24686,3 +24686,16 @@ echo "  freetype: $use_freetype"
 echo "  atsui: $use_atsui"
 echo ""
 
+if test x"$use_freetype" != "xyes" && \
+   test x"$use_atsui"    != "xyes" ; then
+
+   { { echo "$as_me:$LINENO: error: Cairo requires at least one font backend.
+                  Please install freetype and fontconfig, then try again:
+                  http://freetype.org/  http://fontconfig.org/
+                " >&5
+echo "$as_me: error: Cairo requires at least one font backend.
+                  Please install freetype and fontconfig, then try again:
+                  http://freetype.org/  http://fontconfig.org/
+                " >&2;}
+   { (exit 1); exit 1; }; }
+fi

gfx/cairo/cairo/configure.in

@@ -372,3 +372,11 @@ echo "  freetype: $use_freetype"
 echo "  atsui: $use_atsui"
 echo ""
 
+if test x"$use_freetype" != "xyes" && \
+   test x"$use_atsui"    != "xyes" ; then
+
+   AC_MSG_ERROR([Cairo requires at least one font backend.
+                  Please install freetype and fontconfig, then try again:
+                  http://freetype.org/  http://fontconfig.org/
+                ])
+fi

gfx/cairo/font-backend.diff

@@ -0,0 +1,24 @@
+Index: configure.in
+===================================================================
+RCS file: /cvsroot/mozilla/gfx/cairo/cairo/configure.in,v
+retrieving revision 1.1
+diff -u -8 -p -u -r1.1 configure.in
+--- configure.in	24 Feb 2005 20:08:53 -0000	1.1
++++ configure.in	8 Mar 2005 18:12:11 -0000
+@@ -367,8 +367,16 @@ echo "  PDF: $use_pdf"
+ echo "  PNG: $use_png"
+ echo "  glitz: $use_glitz"
+ echo ""
+ echo "and the following font backends:"
+ echo "  freetype: $use_freetype"
+ echo "  atsui: $use_atsui"
+ echo ""
+ 
++if test x"$use_freetype" != "xyes" && \
++   test x"$use_atsui"    != "xyes" ; then
++
++   AC_MSG_ERROR([Cairo requires at least one font backend.
++                  Please install freetype and fontconfig, then try again:
++                  http://freetype.org/  http://fontconfig.org/
++                ])
++fi