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# ROCK Linux: rock-src/package/tschmidt/graphviz/gvconfig_hotfix.patch
# ROCK Linux is Copyright (C) 1998 - 2006 Clifford Wolf
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--- ./lib/gvc/gvconfig.c.orig	2005-08-18 11:25:03.000000000 +0200
+++ ./lib/gvc/gvconfig.c	2005-08-18 11:28:17.000000000 +0200
@@ -235,7 +235,12 @@
     gvplugin_library_t *library;
     char *plugin_glob = "libgvplugin*.so.?";
 
-    if (config_path) {
+    // this so-called "config file" should be in /var/cache, morrons!
+    // here is a little hack which skips updating the file when graphviz is
+    // called in a Build-Pkg process tree (unless when building graphviz).
+    // The variable ROCK_BUILDING_GRAPHVIZ must be set by the graphviz.conf
+    // script when building graphviz.  - clifford
+    if (config_path && (!getenv("ROCKCFG_ID") || getenv("ROCK_BUILDING_GRAPHVIZ"))) {
 	f = fopen(config_path,"w");
 	if (!f) {
 	    agerr(AGERR,"failed to open %s for write.\n", config_path);