build: Use C23 if possible

For broader compiler support, we try both -std=c23 and -std=c2x.  If
neither is supported, we fall back to -std=c17, but we will start
requiring some C23 features as extensions in this mode.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/diag.h b/src/diag.h
index 0a4d3b9..9f3e8e1 100644
--- a/src/diag.h
+++ b/src/diag.h
@@ -55,9 +55,9 @@ void bfs_diagf(const char *format, ...);
 /**
  * Print a message to standard error and abort.
  */
+_noreturn
 _cold
 _printf(1, 2)
-_noreturn
 void bfs_abortf(const char *format, ...);
 
 /**