3 files changed, 22 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/linux/getsourcefilter.c b/sysdeps/unix/sysv/linux/getsourcefilter.c
index 806cb161e4..1465d69348 100644
--- a/sysdeps/unix/sysv/linux/getsourcefilter.c
+++ b/sysdeps/unix/sysv/linux/getsourcefilter.c
@@ -31,6 +31,7 @@
 #include <netrose/rose.h>
 #include <sys/param.h>
 #include <sys/socket.h>
+#include "getsourcefilter.h"
 
 
 static const struct
diff --git a/sysdeps/unix/sysv/linux/getsourcefilter.h b/sysdeps/unix/sysv/linux/getsourcefilter.h
new file mode 100644
index 0000000000..ac49290881
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/getsourcefilter.h
@@ -0,0 +1,20 @@
+/* __get_sol function prototype.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Defined in getsourcefilter.c.  */
+extern int __get_sol (int af, socklen_t len) attribute_hidden;
diff --git a/sysdeps/unix/sysv/linux/setsourcefilter.c b/sysdeps/unix/sysv/linux/setsourcefilter.c
index b4160ff4d8..ade424bbac 100644
--- a/sysdeps/unix/sysv/linux/setsourcefilter.c
+++ b/sysdeps/unix/sysv/linux/setsourcefilter.c
@@ -24,10 +24,7 @@
 #include <stdint.h>
 #include <netinet/in.h>
 #include <sys/socket.h>
-
-
-/* Defined in getsourcefilter.c.  */
-extern int __get_sol (int af, socklen_t len);
+#include "getsourcefilter.h"
 
 
 int