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new 529db2da chore(r): Fix -Wkeyword-macro for flatcc header when compiled
with C23 (#742)
529db2da is described below
commit 529db2da549e16bc96e5886a3219adcdd1976ec7
Author: Dewey Dunnington <de...@dunnington.ca>
AuthorDate: Mon Apr 14 21:23:39 2025 -0500
chore(r): Fix -Wkeyword-macro for flatcc header when compiled with C23
(#742)
Closes #740.
I check with `usethis::edit_r_makevars()`:
```
CC=clang -std=c2x
CFLAGS=-Wkeyword-macro
```
The error doesn't reproduce on `r-hub/containers/clang20`, possibly
because it's not using `-std=c23` or didn't build clang with the option
to use that as the default C standard.
---
thirdparty/flatcc/include/flatcc/portable/pstdalign.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/thirdparty/flatcc/include/flatcc/portable/pstdalign.h
b/thirdparty/flatcc/include/flatcc/portable/pstdalign.h
index 169fe27e..989792eb 100644
--- a/thirdparty/flatcc/include/flatcc/portable/pstdalign.h
+++ b/thirdparty/flatcc/include/flatcc/portable/pstdalign.h
@@ -140,6 +140,9 @@ extern "C" {
#endif /* __STDC__ */
+// For C23, alignas/alignof are keywords and will warn (-Wkeyword-macro) when
#defined here
+#if !(defined(__STDC__) && __STDC__ && defined(__STDC_VERSION__) &&
__STDC_VERSION__ >= 202311L)
+
#ifndef alignas
#define alignas _Alignas
#endif
@@ -148,6 +151,8 @@ extern "C" {
#define alignof _Alignof
#endif
+#endif
+
#define __alignas_is_defined 1
#define __alignof_is_defined 1
