[LIBM] One step closer to C99 conformance

From: Steve Kargl <sgk_at_troutmask.apl.washington.edu>
Date: Fri, 05 Nov 2021 01:07:33 UTC
A patch has been attached to 

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216862

which implements cexpl().

Note, the patch includes some bug fixes for libm on
ld128 hardware.

-- 
Steve