Re: Do we still need MSDOS support?

[sfeam <sf...@us...>]

On Friday, 06 April 2018 15:27:10 Petr Mikulik wrote:
> I build gnuplot on OS/2 via gcc/emx. The binary then runs on OS/2, 
> eCommStation, DOS with emx.exe or rsx.exe. Thus it is necessary to keep 
> __OS2__ and __EMX__.
> 
> The gcc/emx I use is gcc 2.8.1, and it does not know command line option 
> "-std=c99".

Do you use (or build) the emxvga terminal?
The source is basically untouched since 2002.

> I've prepared some patches for OS/2 in 2017 but not committed them due to the 
> transfer of cvs to git. I'll have to learn how to submit them.
> 
> BTW, would not C99 syntax break VMS/VAX compilers? Its makefile is still 
> in the config/ directory.

VMS support is also a candidate for being dropped.
I was myself test-building releases on VMS through version 4.6
but I no longer have a bootable VMS machine.   To the extent that VMS
lives on in the larger world, it is via emulation on virtual machines.
I have not been able to find any mention of gnuplot being used in that
context, but even if it is I imagine that the output is not via
the VAX Windowing System (vws.trm).
	
	Ethan



> Petr
> 
> 
> >> EMX:  Used on DOS and OS/2, so removing support for it might break
> >>    OS/2, too (Petr?)
> >
> > Petr:
> >
> > Are you still building gnuplot on OS/2?
> > What toolset[s] are needed for that?
> >
> > In particular I am wondering if the __EMX__ conditional code and the
> > emxvga.trm driver can be removed.
> >
> > The EMX project web page seems to show that the most recent
> > supported gcc is 3.0.4 (from 2002).  I suspect that if we move to
> > requiring a compiler that accepts C99 syntax that version is too old.
> 
> 
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