$NetBSD: patch-gcc_Makefile.in,v 1.1 2020/05/10 15:02:44 maya Exp $

Add gcc libdir to a programs rpath so that _this gcc's_ support libraries
are found.

--- gcc/Makefile.in.orig	2017-04-18 18:10:27.000000000 +0000
+++ gcc/Makefile.in
@@ -2112,6 +2112,7 @@ prefix.o: $(BASEVER)
 # Language-independent files.
 
 DRIVER_DEFINES = \
+  -DLINK_LIBGCC_SPEC="\"%D $(LINKER_RPATH_FLAG) $(prefix)//lib/%M $(LINKER_RPATH_FLAG) $(libdir)/%M \"" \
   -DSTANDARD_STARTFILE_PREFIX=\"$(unlibsubdir)/\" \
   -DSTANDARD_EXEC_PREFIX=\"$(libdir)/gcc/\" \
   -DSTANDARD_LIBEXEC_PREFIX=\"$(libexecdir)/gcc/\" \