[FreeVMS] Question

[BERTRAND Joël]

Johann 'Myrkraverk' Oskarsson a écrit :
> Hi,
>
> On Sun, Jun 23, 2013 at 6:33 PM, Renee<rmctwo at gmail.com>  wrote:
>> Posix? Why write posix at all?
>> Renee
>
> Posix is an important part of any server environment today; at least
> the C RTL parts of it.  It's better to think about it from the start
> rather than try to wedge it on the system after the fact.
>
>> -----Original Message-----
>> From: FreeVMS [mailto:freevms-bounces at rayleigh.systella.fr] On Behalf Of
>> BERTRAND Joël
>
>>          DCL will be written when we'll have a running kernel. There are a
>> lot of stuff to do before starting DCL.
>
> True.
>
>>          If you want to start to write some userland code (not kernel,
>> executive or system ones), in a first time you have to implemant
>> sources/userland/rtl and sources/userland/starlet to obtain a VMS API or to
>> port newlib on FreeVMS to obtain a real POSIX layer. But to write
>> STARLET/LIB$ or port newlib, we have to define some SYSCALLs. Today, only
>> SYSCALL$PRINT, SYSCALL$EXIT_VALUE and SYSCALL$KILL_THREAD have been written
>> (sys/sys_loop.c).
>
> What exactly is newlib?
>
> It's not my call, but I would build the kernel to provide both VMS and
> Posix system calls, similar what's been done in Haiku where they
> implement both BeOS and a subset of Posix system calls.

	Newlib is a POSIX libc that only uses a few syscalls.

> Is there a tutorial on how to build and run FreeVMS?  Something that
> demonstrates how to go from pure source code to running it in a
> (virtual) machine?

	You have an howto in sources to build a qemu disk image. Today, you 
cannot run any code as FreeVMS requires a pager (and sometimes, kernel 
freezes during initialization as recursive mutexes are broken. I think I 
will fix these mutexes this monday and push modifications in git tree).

	Regards,

	JKB