Hi Markus,
> > Which Cygwin version, please?
>
> The log of that run contains the following line:
> Starting cygwin install, version 2.932
>
> Is that the Cygwin version?
It is not the Cygwin version, but it at least tells me that it's a recent
Cygwin version.
> All packages should be the latest stable versions that are distributed by the
> Cygwin project.
OK. Then the Cygwin version is 3.5.3. I could reproduce the error.
The patch below fixes it for me. It reverts a workaround for gcc 14.0.1
from a few days ago, for which I'm adding a different workaround later.
2024-05-01 Bruno Haible <br...@clisp.org>
stddef: Fix <stddef.h> behaviour on Cygwin (regression 2024-04-27).
Reported by Markus Mützel <markus.muet...@gmx.de> in
<https://lists.gnu.org/archive/html/bug-gnulib/2024-04/msg00522.html>.
* lib/stddef.in.h: Don't test _@GUARD_PREFIX@_STDDEF_H. Fix comments.
diff --git a/lib/stddef.in.h b/lib/stddef.in.h
index fa249259cd..ac81257b5c 100644
--- a/lib/stddef.in.h
+++ b/lib/stddef.in.h
@@ -27,10 +27,9 @@
#endif
@PRAGMA_COLUMNS@
-#if (!defined _@GUARD_PREFIX@_STDDEF_H \
- && (defined __need_wchar_t || defined __need_size_t \
- || defined __need_ptrdiff_t || defined __need_NULL \
- || defined __need_wint_t))
+#if (defined __need_wchar_t || defined __need_size_t \
+ || defined __need_ptrdiff_t || defined __need_NULL \
+ || defined __need_wint_t)
/* Special invocation convention inside gcc header files. In
particular, <stddef.h> in some ancient versions of GCC blindly
redefined NULL when __need_wint_t was defined, even though wint_t
@@ -38,7 +37,7 @@
(FIXME: It's not clear what GCC versions those were - perhaps so
ancient that we can stop worrying about this?)
Although glibc 2.26 (2017) and later do not use __need_wint_t,
- for portability to older Glibc + GCC,
+ for portability to macOS, Cygwin, Haiku, and older Glibc + GCC,
remember if special invocation has ever been used to obtain wint_t,
in which case we need to clean up NULL yet again. */
