[KevinH]

Update I looked in qtbase dev source and found this:

qtbase/src/3rdparty/pcre2/src/config.h

And it sets LINK_SIZE to 2, so Qt's regular expressions have the same limitation.

And according to the Arch linux package build they just use pcre2's configure with no changes so it uses the default value as well, so it will have that same limitation. So my guess is most if not all other Linux distributions do the same.