[m-users.] Can't compile sample programn

[Peter Wang]

On Wed, 20 Mar 2019 23:23:47 +1100, Peter Wang <novalazy at gmail.com> wrote:
> On Wed, 20 Mar 2019 12:44:28 +0100, Volker Wysk <post at volker-wysk.de> wrote:
> > 
> > I've tried it with --link-object posix_workarounds.o and --extra-library-
> > header posix_workarounds.h, like you've written. This works. But I think this 
> > shouldn't be necessary to specify every time, after the library has been 
> > correctly installed. Am I right?
> > 
> 
> The workarounds for the FD_* macros might not even be required on any
> modern systems. It will take some effort to confirm. The easiest option
> would be to just remove the workarounds and put them back only as
> reports come in, if they do.

And if we do need to reinstate any workaround, it may be done in a
different way. IIRC, the only problem was FD_ZERO being defined with
inline assembly in glibc headers, where the assembly code conflicts with
low-level C grades using gcc global register variables. We could just
use memset (or MR_memset) instead of FD_ZERO, for example.

Peter