http://www.nabble.com/-crosstool-ng---patch--glibc-2.9-patch-for-%22undefined-reference-to-%09%60_begin%27-td22751673.html

Probably due to a feature in binutils 2.19.15 which I'm using arm.

--- glibc-2.9_orig/elf/Makefile 2009-03-26 20:26:42.000000000 -0700
+++ glibc-2.9/elf/Makefile 2009-03-26 20:14:11.000000000 -0700
@@ -304,7 +304,7 @@
  $(LDFLAGS-rtld) -Wl,-z,defs -Wl,--verbose 2>&1 | \
  LC_ALL=C \
  sed -e '/^=========/,/^=========/!d;/^=========/d' \
-      -e 's/\. = 0 + SIZEOF_HEADERS;/& _begin = . - SIZEOF_HEADERS;/' \
+      -e 's/\. = .* + SIZEOF_HEADERS;/& _begin = . - SIZEOF_HEADERS;/' \
  > $@.lds
 $(LINK.o) -nostdlib -nostartfiles -shared -o $@ \
  $(LDFLAGS-rtld) -Wl,-z,defs $(z-now-$(bind-now)) \