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-rw-r--r--lib/libc/gen/semctl.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/libc/gen/semctl.c b/lib/libc/gen/semctl.c
index 0322743..4b5283f 100644
--- a/lib/libc/gen/semctl.c
+++ b/lib/libc/gen/semctl.c
@@ -35,6 +35,8 @@ __FBSDID("$FreeBSD$");
#include <stdarg.h>
#include <stdlib.h>
+extern int __semctl(int semid, int semnum, int cmd, union semun *arg);
+
int semctl(int semid, int semnum, int cmd, ...)
{
va_list ap;
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