describe: when failing, tell the user about options that work

diff --git a/xdiff-interface.h b/xdiff-interface.h
index 7352b9a9c204c2b1d4ca9df5ce040fe22d6f521c..55572c39a10dee336355f816b324946fc087d6e7 100644 (file)
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -21,6 +21,7 @@ int read_mmfile(mmfile_t *ptr, const char *filename);
 int buffer_is_binary(const char *ptr, unsigned long size);
 
 extern void xdiff_set_find_func(xdemitconf_t *xecfg, const char *line, int cflags);
+extern void xdiff_clear_find_func(xdemitconf_t *xecfg);
 extern int git_xmerge_config(const char *var, const char *value, void *cb);
 extern int git_xmerge_style;