grep: teach --debug option to dump the parse tree

diff --git a/grep.h b/grep.h
index ed7de6bec8e604a7b3dcb9f9a19053696b7c3fdf..bf5be5ada4bc84a814cf0fe41b613bebd6ac7ce4 100644 (file)
--- a/grep.h
+++ b/grep.h
@@ -90,6 +90,7 @@ struct grep_opt {
        int word_regexp;
        int fixed;
        int all_match;
+       int debug;
 #define GREP_BINARY_DEFAULT    0
 #define GREP_BINARY_NOMATCH    1
 #define GREP_BINARY_TEXT       2