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$NetBSD: patch-libgcc_config_t-slibgcc-sld,v 1.1 2014/05/10 14:14:59 richard Exp $
--- libgcc/config/t-slibgcc-sld.orig 2011-06-01 14:39:17.000000000 +0000
+++ libgcc/config/t-slibgcc-sld
@@ -3,3 +3,23 @@
SHLIB_LDFLAGS = -Wl,-h,$(SHLIB_SONAME) -Wl,-z,text -Wl,-z,defs \
-Wl,-M,$(SHLIB_MAP)
+
+# Linker mapfile to enforce direct binding to libgcc_s unwinder
+# (PR target/59788).
+libgcc-unwind.map: libgcc-std.ver
+ @(echo "{"; \
+ for f in `grep _Unwind_ $< | sort`; do \
+ echo " $$f = EXTERN DIRECT;"; \
+ done; \
+ echo "};" ) > $@
+
+# Copy libgcc-unwind.map to the place where gcc will look for it at build-time.
+install-libgcc-unwind-map-forbuild: libgcc-unwind.map
+ $(INSTALL_DATA) $< $(gcc_objdir)
+
+all: install-libgcc-unwind-map-forbuild
+
+install-libgcc-unwind-map: libgcc-unwind.map
+ $(INSTALL_DATA) $< $(DESTDIR)$(slibdir)
+
+install: install-libgcc-unwind-map
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