RE_SYNTAX_POSIX_EXTENDED 5665 libglibc/regex.c       RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC;
RE_SYNTAX_POSIX_EXTENDED  183 libglibc/regex.h   ((RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DEBUG)	\
RE_SYNTAX_POSIX_EXTENDED  187 libglibc/regex.h   (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS		\