make arch __set_thread_area backends hidden

this is not a public interface, and does not even necessarily match
the syscall on all archs that have a syscall by that name.

on archs where it's implemented in C, no action on the source file is
needed; the hidden declaration in pthread_arch.h suffices.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h
index 3c85544c..813b5966 100644
--- a/src/internal/pthread_impl.h
+++ b/src/internal/pthread_impl.h
@@ -142,7 +142,7 @@ void *__copy_tls(unsigned char *);
 void __reset_tls();
 
 hidden int __clone(int (*)(void *), void *, int, void *, ...);
-int __set_thread_area(void *);
+hidden int __set_thread_area(void *);
 int __libc_sigaction(int, const struct sigaction *, struct sigaction *);
 void __unmapself(void *, size_t);