enum grep_header_field field;
        regex_t regexp;
        unsigned fixed:1;
+       unsigned ignore_case:1;
        unsigned word_regexp:1;
 };
 
        regex_t regexp;
        int linenum;
        int invert;
+       int ignore_case;
        int status_only;
        int name_only;
        int unmatch_name_only;
        int max_depth;
        int funcname;
        char color_match[COLOR_MAXLEN];
-       const char *color_external;
        int regflags;
        unsigned pre_context;
        unsigned post_context;