Perl_my_vsnprintf: avoid compiler warning

in the usequadmath branch, gcc is too clever for its own good:

    PERL_UNUSED_ARG(ap);

gives:

util.c:5299:18: warning: ‘sizeof’ on array function parameter ‘ap’ will
return size of ‘__va_list_tag *’ [-Wsizeof-array-argument]

Stick in a void* cast to shut it up.

(cherry picked from commit bf49eae4014ca7ff7b44362d99251f5b9f30bec8)

1 files changed, 2 insertions, 1 deletions

diff --git a/util.c b/util.c
index b64e87dd32..7c3d271f51 100644
--- a/util.c
+++ b/util.c
@@ -5319,7 +5319,8 @@ Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap
     PERL_UNUSED_ARG(buffer);
     PERL_UNUSED_ARG(len);
     PERL_UNUSED_ARG(format);
-    PERL_UNUSED_ARG(ap);
+    /* the cast is to avoid gcc -Wsizeof-array-argument complaining */
+    PERL_UNUSED_ARG((void*)ap);
     Perl_croak_nocontext("panic: my_vsnprintf not available with quadmath");
     return 0;
 #else