Re: [Gm2] gm2 on gcc-5.2.0

[john o goyo]

On 01/01/2017 13:38, Dragiša Durić wrote:
> I don’t think coroutines can be implemented with POSIX threads, and
> definitely not by simple pth<->pthread function replacement. Difference
> is fundamental - from OS side coroutine is nothing special while POSIX
> thread is “everything special”, almost a process.
>
> But, if I understand correctly, John is not asking for that, he maybe
> missinterpreted what libpth and libpthread are…?

Indeed, my mistake.  PTH is the GNU Portable Threads library and PThread 
is POSIX threads library.

I have built PTH locally and shall try building gm2-5.2.0 again.

john


> --
> Dragiša Durić
> address@hidden <mailto:address@hidden>
>
> > On 01 Jan 2017, at 13:55, Gaius Mulley <address@hidden
> > <mailto:address@hidden>> wrote:
> >
> > john o goyo <address@hidden <mailto:address@hidden>>
> > writes:
> >
> > > Gaius:
> > >
> > > On 24/12/2016 10:22, Gaius Mulley wrote:
> > > > Hi,
> > > >
> > > > just to report that the gm2 graft onto gcc-5.2.0 now completely builds
> > > > on an LP64 debian system with the following results.
> > >
> > > The gm2-5.2.0 build fails (with the latest tarball) on Solaris
> > > 10/sparc. On Solaris, POSIX threads are in libpthread, not libpth. Is
> > > there a simple way to switch from -lpth to -lpthread in the gm2
> > > portion?
> > >
> > > john
> >
> > Hi John,
> >
> > there isn't yet a simple way, it could be implemented if required
> > though. Gm2 uses libpth for the create context (NEWPROCESS), switch
> > context (TRANSFER) and pth_select for (IOTRANSFER). Do these low level
> > (create context/switch context) primitives exist in libpthread ?
> >
> > Here are the actual symbols used:
> >
> > pth_uctx_create, pth_uctx_make,
> > pth_uctx_save, pth_uctx_switch,
> >
> > and type
> >
> > pth_uctx_t
> >
> > If these symbols exist then we could certainly change the driver to pick
> > up -lpthread at link time in the gm2 driver. ./configure could also be
> > changed to override the choice at build time as well.
> >
> > I wonder if it might be easier to build libpth and install it locally
> > to work around the problem for now?
> >
> > regards,
> > Gaius
> >
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