Create a build structure that will (eventually) support using the VFS to manage named semaphores

1 files changed, 6 insertions, 3 deletions

diff --git a/nuttx/include/semaphore.h b/nuttx/include/semaphore.h
index 99f067824..5818f0fb7 100644
--- a/nuttx/include/semaphore.h
+++ b/nuttx/include/semaphore.h
@@ -129,15 +129,18 @@ struct timespec; /* Defined in time.h */
 
 int        sem_init(FAR sem_t *sem, int pshared, unsigned int value);
 int        sem_destroy(FAR sem_t *sem);
-FAR sem_t *sem_open(FAR const char *name, int oflag, ...);
-int        sem_close(FAR sem_t *sem);
-int        sem_unlink(FAR const char *name);
 int        sem_wait(FAR sem_t *sem);
 int        sem_timedwait(FAR sem_t *sem, FAR const struct timespec *abstime);
 int        sem_trywait(FAR sem_t *sem);
 int        sem_post(FAR sem_t *sem);
 int        sem_getvalue(FAR sem_t *sem, FAR int *sval);
 
+#ifdef CONFIG_FS_NAMED_SEMAPHORES
+FAR sem_t *sem_open(FAR const char *name, int oflag, ...);
+int        sem_close(FAR sem_t *sem);
+int        sem_unlink(FAR const char *name);
+#endif
+
 #undef EXTERN
 #ifdef __cplusplus
 }