Oops, there was a small bug in this patch. Corrected like this:
2023-04-08 Bruno Haible <br...@clisp.org>
vasnwprintf-posix: Really work around %La bug in glibc 2.15 and Haiku.
* m4/vasnprintf.m4 (gl_PREREQ_VASNWPRINTF): Fix a copy&paste bug.
diff --git a/m4/vasnprintf.m4 b/m4/vasnprintf.m4
index ca14ce49b4..639b29a1f3 100644
--- a/m4/vasnprintf.m4
+++ b/m4/vasnprintf.m4
@@ -115,7 +115,7 @@ AC_DEFUN_ONCE([gl_PREREQ_VASNWPRINTF],
;;
esac
gl_SWPRINTF_DIRECTIVE_LA
- case "$gl_cv_func_printf_directive_a" in
+ case "$gl_cv_func_swprintf_directive_la" in
*yes) ;;
*)
AC_DEFINE([NEED_WPRINTF_DIRECTIVE_LA], [1],
