Index: uspace/app/binutils/Makefile
===================================================================
--- uspace/app/binutils/Makefile	(revision cac458feb10a7e040acc99153f39620be18acbdc)
+++ uspace/app/binutils/Makefile	(revision 41e2118326f0cb86aec205f8eeebb59a8605649f)
@@ -167,7 +167,7 @@
 $(CONFOBJ_SOURCE):
 	echo '/* GENERATED FILE. DO NOT MODIFY. */' > $@; \
-	grep -r -o -h -I -E 'posix_[^ \(]*\(' $(LIBPOSIX_PREFIX) | \
-	sort -u | \
-	sed 's/posix_\([^ (]*\)(/char \1() { return 0; }/g' >> $@
+	objdump -t $(LIBPOSIX_PREFIX)/libposix.a | \
+	grep F | grep -o -h -I -E 'posix_.*$$' | sort -u | \
+	sed 's/posix_\([^ ]*\)/char \1() { return 0; }/g' >> $@
 
 # Compile dummy object for configure script tests.