Enable libgcc floating point emulation routines

[Jim Wilson]

On Wed, Oct 21, 2020 at 7:48 PM William Tambe <tambewilliam@gmail.com>
wrote:

> However, compiling a program that uses __mulsf3() throws the following
> error:
> error: implicit declaration of function ‘__mulsf3’; did you mean
> ‘__mulsc3’? [-Werror=implicit-function-declaration]
>

__mulsf3 isn't a user visible function.  Instead of trying to call it, use
the '*' multiply operator and the compiler will call it for you.

Jim