problem building Gnulib libgnu_a-malloca.o with Debian oldstable's clang

"G. Branden Robinson" <[email protected]> Thu, 6 Aug 2026 22:23:28 -0500

Newsgroups	gmane.comp.lib.gnulib.bugs
Message-ID	<20260807032328.5jkltaxxo42vvobc@illithid>

Hi folks,

I was trying to reproduce a problem with groff 1.25.0.rc2 that Doug
McIlroy reported to me privately...

> lib/vasnprintf.c:7402:86: warning: ‘digits_end_ptr’ may be used
> uninitialized [-Wmaybe-uninitialized]
>  7402 |                                   num_thousands_separators
> (grouping, digits_end_ptr - digits_ptr);
> lib/vasnprintf.c:7379:42: note: ‘digits_end_ptr’ was declared here
>  7379 |                                 TCHAR_T *digits_end_ptr;

...when I found I could not because I ran into this problem first.

  CC       lib/libgnu_a-malloca.o
../lib/malloca.c:49:56: error: too few arguments provided to function-like macro invocation
static_assert (2 * sa_alignment_max - 1 <= (small_t) -1);
                                                       ^
/usr/include/x86_64-linux-gnu/sys/cdefs.h:447:10: note: macro '_Static_assert' defined here
# define _Static_assert(expr, diagnostic) \
         ^
../lib/malloca.c:49:57: error: expected '('
static_assert (2 * sa_alignment_max - 1 <= (small_t) -1);
                                                        ^
2 errors generated.
make: *** [Makefile:9666: lib/libgnu_a-malloca.o] Error 1

Is this a known issue?

Regards,
Branden

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