    RE_BK_PLUS_QM    2032 libglibc/regex.c           if ((syntax & RE_BK_PLUS_QM)
    RE_BK_PLUS_QM    2069 libglibc/regex.c                     || (!(syntax & RE_BK_PLUS_QM) && (c == '+' || c == '?')))
    RE_BK_PLUS_QM    2072 libglibc/regex.c                 else if (syntax & RE_BK_PLUS_QM  &&  c == '\\')
    RE_BK_PLUS_QM    2870 libglibc/regex.c               if (syntax & RE_BK_PLUS_QM)
    RE_BK_PLUS_QM    2900 libglibc/regex.c 	      || ((syntax & RE_BK_PLUS_QM)
    RE_BK_PLUS_QM      67 libglibc/regex.h #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1)
    RE_BK_PLUS_QM     191 libglibc/regex.h   (RE_BK_PLUS_QM              | RE_CHAR_CLASSES				\
    RE_BK_PLUS_QM     215 libglibc/regex.h   (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM)