cdefs: Add FreeBSD _C23_SOURCE extension

Add _C23_SOURCE extension to mirror the _C11_SOURCE define. Unsure how useful this is. Sponsored by: Netflix Reviewed by: brooks Differential Revision: https://reviews.freebsd.org/D47577
freebsd · Nov 15, 2024 · aec6c81 · aec6c81
1 parent 4afcb82
commit aec6c81
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h
@@ -616,6 +616,12 @@
 #define	__BSD_VISIBLE		0
 #define	__ISO_C_VISIBLE		2011
 #define	__EXT1_VISIBLE		0
+#elif defined(_C23_SOURCE)	/* Localism to specify strict C23 env. */
+#define	__POSIX_VISIBLE		0
+#define	__XSI_VISIBLE		0
+#define	__BSD_VISIBLE		0
+#define	__ISO_C_VISIBLE		2023
+#define	__EXT1_VISIBLE		0
 #else				/* Default environment: show everything. */
 #define	__POSIX_VISIBLE		200809
 #define	__XSI_VISIBLE		700