Add semaphore support for NuttX (#1367)

product-mini/platforms/nuttx/wamr.mk

@@ -222,6 +222,12 @@ else
 CFLAGS += -DWASM_ENABLE_LIB_PTHREAD=0
 endif
 
+ifeq ($(CONFIG_INTERPRETERS_WAMR_LIB_PTHREAD_SEMAPHORE),y)
+CFLAGS += -DWASM_ENABLE_LIB_PTHREAD_SEMAPHORE=1
+else
+CFLAGS += -DWASM_ENABLE_LIB_PTHREAD_SEMAPHORE=0
+endif
+
 ifeq ($(CONFIG_INTERPRETERS_WAMR_DISABLE_HW_BOUND_CHECK),y)
 CFLAGS += -DWASM_DISABLE_HW_BOUND_CHECK=1
 else