stdio: make internal symbols static/hidden
Although header libc/stdio/local.h declares the macros and private
variables of stdio, there are several internal symbols exposed
unexpectedly.
Change-Id: Ie7a07f85b70322fb9cd05b3c8e1bcc416061eb4b
diff --git a/libc/stdio/fvwrite.c b/libc/stdio/fvwrite.c
index ee39400..57a57e6 100644
--- a/libc/stdio/fvwrite.c
+++ b/libc/stdio/fvwrite.c
@@ -44,7 +44,7 @@
* This routine is large and unsightly, but most of the ugliness due
* to the three different kinds of output buffering is handled here.
*/
-int
+__LIBC_HIDDEN__ int
__sfvwrite(FILE *fp, struct __suio *uio)
{
size_t len;