portability
diff --git a/skeletons/asn_types.h b/skeletons/asn_types.h
index d2633f6..4785f96 100644
--- a/skeletons/asn_types.h
+++ b/skeletons/asn_types.h
@@ -24,10 +24,8 @@
#endif
#ifdef WIN32
-#define snprintf(str, size, format, args...) \
- _snprintf(str, size, format, ##args)
-#define vsnprintf(str, size, format, ap) \
- _vsnprintf(str, size, format, ap)
+#define snprintf _snprintf
+#define vsnprintf _vsnprintf
#define alloca(size) _alloca(size)
#endif
@@ -59,10 +57,15 @@
*/
#ifndef ASN_DEBUG /* If debugging code is not defined elsewhere... */
#if EMIT_ASN_DEBUG == 1 /* And it was asked to emit this code... */
+#ifdef __GNUC__
#define ASN_DEBUG(fmt, args...) do { \
fprintf(stderr, fmt, ##args); \
fprintf(stderr, "\n"); \
} while(0)
+#else /* !__GNUC__ */
+extern void ASN_DEBUG_f(const char *fmt, ...);
+#define ASN_DEBUG ASN_DEBUG_f
+#endif /* __GNUC__ */
#else /* EMIT_ASN_DEBUG */
#define ASN_DEBUG(fmt, args...) ((void)0) /* Emit a no-op operator */
#endif /* EMIT_ASN_DEBUG */