chore: define `_Nonnull` when not available.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/boot.h b/lib/boot.h
index e81a671..0badfc0 100644
--- a/lib/boot.h
+++ b/lib/boot.h
@@ -126,6 +126,10 @@ static inline void __sync_synchronize(void) {
 
 #define NB_BOOT_VER 0x101
 
+#ifndef _Nonnull
+#define _Nonnull
+#endif // ifndef _Nonnull
+
 #define NB_BOOT_CALL(struct, offset)                                       \
   volatile cb_proc_t proc_##offset = (volatile cb_proc_t)(struct->offset); \
   proc_##offset();