================
@@ -436,6 +436,14 @@ def warn_cxx23_compat_warning_directive : Warning<
def warn_c23_compat_warning_directive : Warning<
"#warning is incompatible with C standards before C23">,
InGroup<CPre23Compat>, DefaultIgnore;
+def ext_pp_embed_directive : ExtWarn<
----------------
karka228 wrote:
Is there a reason why this is a `ExtWarn` and not `Extension`? The difference
as I understand it is that with `ExtWarn` you always get the warning if you
compile with a C standard before C23, but with `Extension` you get it only with
the option `-Wpedantic`. Isn't that how it is normally handled?
If we compare with `_BitInt` that also is a C23 feature it is handled as
`Extension`:
```
def ext_bit_int : Extension<
"'_BitInt' in %select{C17 and earlier|C++}0 is a Clang extension">,
```
https://github.com/llvm/llvm-project/pull/95802
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