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

Correct Dave.

Joe

On Sat, Oct 12, 2019 at 6:51 PM 'Dave Wade' [email protected] [H390-MVS]
<[email protected]> wrote:

>
>
> Joe,
>
>
>
> I hope that what you mean is “S/370 is no longer produced or supported” ,
> rather than  “no longer exists” , if it no longer exists outside Hercules
> then my  P/390 which can be IMLed in 370 mode must have fallen through some
> sort of black hole or there is rent in the space time continuum. It was
> there when I went to Spain a couple of weeks ago. I must admit I haven’t
> checked since I got back but I am pretty sure its still there. . I see that
> a couple of FPGA implementations of S/370 have also appeared…
>
>
>
> … but yes I think you need access to a modern system to properly test and
> debug your code….
>
>
>
> Dave
>
>
>
> *From:* [email protected] <[email protected]>
> *Sent:* 12 October 2019 22:59
> *To:* [email protected]
> *Subject:* Re: [H390-MVS] 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:
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>
>
> 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.
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> 
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