add rv64im{,c,fc} multilibs

[Alexandre Oliva]

On Feb 23, 2021, Jim Wilson <jimw@sifive.com> wrote:

> If we add default multilibs for you, then to be fair, we need to add
> default multilibs for other people that ask, and before long we are trying
> to build hundreds or maybe even thousands of multilibs by default which is
> unworkable.

*nod*, it's a very familiar issue to me, I know where that's coming
from, no worries.  I expected the change would be turned down, and for
good reason, unless there was say an emerging growth of adoption on
those multilibs, which I wasn't aware of.  The expectation didn't stop
me from offering the patch just in case, that's all.

> People that want a different set can define their own, and we have
> made it easy for people to define their own sets of multilibs as Kito
> pointed out.

*nod*, thanks,

-- 
Alexandre Oliva, happy hacker  https://FSFLA.org/blogs/lxo/
   Free Software Activist         GNU Toolchain Engineer
        Vim, Vi, Voltei pro Emacs -- GNUlius Caesar