+
+/* An internal problem was detected, but the requested operation can
+ still proceed. Internal warnings indicate programming errors as
+ opposed to more general issues beyond the application's control.
+ A warning message is constructed using a printf- or vprintf-style
+ argument list. The function "internal_vwarning" must be provided
+ by the client. */
+
+extern void internal_warning (const char *file, int line,
+ const char *fmt, ...)
+ ATTRIBUTE_PRINTF (3, 4);
+
+extern void internal_vwarning (const char *file, int line,
+ const char *fmt, va_list args)
+ ATTRIBUTE_PRINTF (3, 0);