On Sun, May 23, 2021 at 07:38:40AM -0500, Peng Yu via Libc-help wrote:
> http://manpagez.com/man/3/regex/

Better go to the right docs:

  https://www.gnu.org/software/libc/manual/html_node/Flags-for-POSIX-Regexps.html

> BSD regex supports REG_ENHANCED. But I don't find its support in
> glibc. Is there a way to support REG_ENHANCED in glibc? Or there is an
> alternative package that supports REG_ENHANCED across various
> platforms?

glibc supports POSIX supports REG_EXTENDED :)

Cheers
 - t