[TUHS] Mac OS X is Unix

[Álvaro Jurado]

Not. Plan 9 developed a significant dependency of its original compilers.
Plan 9 cc is a caller compiler so main parts of the code couldn't work now
adapted in Harvey for gcc, clang and icc (intel) that are all callee. But
it's not a C problem, it's a compiler issue. Probably with Steve's pcc you
could too. Nerver tried, but it could be a good experiment.
At the end is extremely difficult not to be at any point toolchain
dependent, if Plan 9 original compilers could be improved enough to build
an standard ANSI program out of the tree (they are strongly dependent of
Plan 9 environment), also the Plan 9 code, that way you're suggesting would
be possible.
Anyway, for that, you wouldn't need any preprocessor code, also you
needen't to build amd64 or riscv with the same sources.

Álvaro

El 04/01/2017 10:12, "Tim Bradshaw" <tfb at tfeb.org> escribió:

> So, can you build the system with both  C11 compiler and its older
> compiler, from the same sources (so, no keeping two copies of the same
> functionality and selecting at build time based on the compiler)?  If you
> can I'm impressed.
>
> > On 4 Jan 2017, at 00:12, ron minnich <rminnich at gmail.com> wrote:
> >
> > Well, if by single-implementation, you mean single-compiler, I have a
> counter example: Harvey is Plan 9 with just enough changed to be C11
> compliant.
>
>
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