-#define vsnprintf _vsnprintf
-#endif
-
-int obstack_printf(struct obstack *obst, const char *fmt, ...)
+/* win32/C89 has no va_copy function... so we have to use the stupid fixed-length version */
+int obstack_vprintf(struct obstack *obst, const char *fmt, va_list ap) FIRM_NOTHROW
+{
+ char buf[16384];
+ int len = _vsnprintf(buf, sizeof(buf), fmt, ap);
+ obstack_grow(obst, buf, len);
+ return len;
+}
+#else
+int obstack_vprintf(struct obstack *obst, const char *fmt, va_list ap) FIRM_NOTHROW