--- /dev/null
+--- a/libpthread/linuxthreads.old/errno.c
++++ b/libpthread/linuxthreads.old/errno.c
+@@ -22,6 +22,7 @@
+ #include "internals.h"
+ #include <stdio.h>
+
++libpthread_hidden_proto(__errno_location)
+ int *
+ __errno_location (void)
+ {
+@@ -29,6 +30,7 @@ __errno_location (void)
+ return THREAD_GETMEM (self, p_errnop);
+ }
+
++libpthread_hidden_proto(__h_errno_location)
+ int *
+ __h_errno_location (void)
+ {