error: unrecognized command-line option ‘--std=c23’

[Ratio2]

Version: master

The latest version of Debian contains gcc version 12. It makes sense to replace c23 with gnu2x (c2x not enough)

$ make
...
cc: error: unrecognized command-line option ‘--std=c23’; did you mean ‘--std=c2x’?

[gf-mse]

Probably should have opened a separate issue for this, but not sure if the new standards are more relaxed and allow the below; with either of --std=gnu11 or --std=gnu2x on gcc 11.4.0 had to remove the "delete this" definition of struct list_head to make it compile :

--- results-tree.h      2024-11-17 18:51:29.857791001 +1100
+++ results-tree.h      2024-11-17 19:28:22.163097579 +1100
@@ -21,10 +21,12 @@
 
 #include "csum.h"
 
+#include "list.h"
+
 // TODO: delete this
-struct list_head {
-       struct list_head *next, *prev;
-};
+// struct list_head {
+//     struct list_head *next, *prev;
+// };
 
 struct results_tree {
        struct rb_root  root;

Otherwise the build (as of commit c389d3d5309ed5641aae8cb5d7a255019396bf86) seems to complete Ok.