Re: Re: Slightly off-topic: development machine for z/OS wanted

VB,

GCC (latest version) already has a z/os target (s390x) ...

https://gcc.gnu.org/install/specific.html


   - s390-*-linux* <https://gcc.gnu.org/install/specific.html#s390-x-linux>
   - s390x-*-linux*
   <https://gcc.gnu.org/install/specific.html#s390x-x-linux>
   - s390x-ibm-tpf*
   <https://gcc.gnu.org/install/specific.html#s390x-ibm-tpf>

This targets z/os as well as TPF...

s390-*-linux*

S/390 system running GNU/Linux for S/390.
------------------------------
s390x-*-linux*

zSeries system (64-bit) running GNU/Linux for zSeries.
------------------------------
s390x-ibm-tpf*

zSeries system (64-bit) running TPF. This platform is supported as
cross-compilation target only.


What Paul has is an S/370 target, an architecture that no longer exists (it
is only available on Hercules). He has added limited 31-bit support in what
he calls a "380" architecture.

Whatever you want to port, you should be able to using the s390x target on
your PC, then using FTP to upload to the target z/series and run the binder
to make it a load module.
Joe

On Sat, Oct 12, 2019 at 3:46 PM [email protected] [H390-MVS] <
[email protected]> wrote:

>
>
> Hi, Paul,
>
> I'm aware of the fork(2) problem. There's still no fork in many POSIX
> implementations. And this function was not part of older POSIX versions
> (while it is in 2017).
>
> Unfortunately, the C standard is not sufficient for implementing many
> programs even in C17. Usually, when it's coming to C then it will be
> “standard C with extensions adding POSIX functions”, even in 2019. We've
> this problem at pEp, and we found our way of dealing with it. If real world
> programs should be ported to MVS then such an API has to be provided or it
> will most likely not happen.
>
> There's a POSIX path rule, which might be of interest to you: operating
> system special paths are starting with a double slash (//). IBM is using
> this as following:
>
>
> https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.bpxa500/mvsds.htm
>
> On MVS/380 I'd have questions:
>
> «For some reason with TK4- you can't use TSO while running a 31-bit batch
> job.» Does this mean I've to stop TSO before I can run a batch job, and I
> have to run it from console?
>
> My problem is I'm not experienced in MVS. I know basic system programming
> there, that's it. Which way is the easiest to get MVS/380 running in
> Hercules? I'm depending on solutions like TK4- because they're turn key. I
> don't feel secure enough to get a system installed myself.
>
> Yours,
> VB.
>
> 
>