Re: [Tack-devel] all of Ack-5.5 under Linux

[David G. <dg...@co...>]

On Wed, 20 Jun 2018 at 22:47 <u-...@ae...> wrote:
[...]

> What is a "machine target"? Guessing:
> "a combinations of a CPU and an OS syscall API"?
> This is more or less what Ack-5.5 "mach" is, that's why I asked.
>

Yup. In fact, 5.5 had the same divide, it's just it put both types of thing
in the same mach directory --- this is why there's a mach/minix (containing
the OS-specific bit) and a mach/i386 (containing the CPU-specific bit). I
split these into two directories because I found it confusing.

The libc is currently in lang/cem/libcc.ansi, and it contains both the
OS-generic things like strcmp() and malloc(), and also some OS-specific
things like system() and stdio, which rely on Posix system calls. This is
all mixed together and there's no (good) way for a plat to configure it.


> The reusable parts do not logically "belong" to any "machine target"
> so for clarity should have their own place.
>

What do you mean by reusable parts in this context?