$NetBSD: patch-ag,v 1.5 2005/07/31 15:26:58 recht Exp $

--- libgc/dyn_load.c.orig	2005-04-11 16:12:45.000000000 +0200
+++ libgc/dyn_load.c
@@ -70,6 +70,12 @@
 #   include <dlfcn.h>
 #   include <link.h>
 #endif
+
+#ifdef NETBSD 
+#include <machine/db_machdep.h>
+#include <dlfcn.h>
+#endif
+
 #ifdef SUNOS4
 #   include <dlfcn.h>
 #   include <link.h>
@@ -509,6 +515,31 @@ GC_FirstDLOpenedLinkMap()
                 break;
             }
         }
+
+#if defined(NETBSD)
+#undef dlopen
+#undef dlsym
+#undef dlclose
+		/* This is a hack. For now, it seems that NetBSD 2.0 does not provide
+		   a _DYNAMIC with the neccessary DT_DEBUG information. A simple dlopen(0, RTLD_LAZY)
+		   does the job. Maybe a NetBSD guru could explain this...
+	     */		
+		if(cachedResult == 0) {
+			void* startupSyms = dlopen(0, RTLD_LAZY);
+			dp = (ElfW(Dyn)*)dlsym(startupSyms, "_DYNAMIC");
+
+			for(; (tag = dp->d_tag) != 0; dp++ ) {
+				if( tag == DT_DEBUG ) {
+					struct link_map *lm
+							= ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
+					if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
+					break;
+				}
+			}
+
+			dlclose(startupSyms);
+		}
+#endif
     }
     return cachedResult;
 }