nptl: mark symbols with libc forwarder hidden

Add attribute_hidden to all symbols having libc forwarder. This prevents
recursive self calls which would happen if libc is before libpthread in
linking order: the forwarder functions would call itself via the function
table, since the libpthread symbols would get overwritten with libc ones.
This has not been a problem in glibc since there these symbols are marked
hidden with linker version-script. Since we don't use one, we need to mark
these explicitly.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/libpthread/nptl/pthread_equal.c b/libpthread/nptl/pthread_equal.c
index 8587e0f52..4c9a24caf 100644
--- a/libpthread/nptl/pthread_equal.c
+++ b/libpthread/nptl/pthread_equal.c
@@ -21,6 +21,7 @@
 
 
 int
+attribute_hidden
 __pthread_equal (pthread_t thread1, pthread_t thread2)
 {
   return thread1 == thread2;