[patch] use POSIX awk expression rather than GNU extension

[Mike Frysinger <vapier at gentoo dot org>]

in elf/Makefile, GNU awk accepts this expression:
	und(|ef)
but POSIX says that '|' occurring right after '(' or right before ')' produces 
undefined results.  a replacement expression is:
	und(ef)?
attached patch makes this change.
-mike

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2007-12-24  Mike Frysinger  <vapier@gentoo.org>

	* elf/Makefile ($(objpfx)ld.so): Use POSIX (EF)? in awk.

--- libc/elf/Makefile
+++ libc/elf/Makefile
@@ -308,7 +308,7 @@ $(objpfx)ld.so: $(objpfx)librtld.os $(ld
 		  -Wl,-soname=$(rtld-installed-name) -T $@.lds
 	rm -f $@.lds
 	readelf -s $@ \
-	  | $(AWK) '($$7 ~ /^UND(|EF)$$/ && $$1 != "0:" && $$4 != "REGISTER") { print; p=1 } END { exit p != 0 }'
+	  | $(AWK) '($$7 ~ /^UND(EF)?$$/ && $$1 != "0:" && $$4 != "REGISTER") { print; p=1 } END { exit p != 0 }'
 
 # interp.c exists just to get this string into the libraries.
 CFLAGS-interp.c = -D'RUNTIME_LINKER="$(slibdir)/$(rtld-installed-name)"' \