[HACKERS] UnixWare/Threads stuff [repost from March]

[Larry Rosenman]

This is a re-post, and still the state of things.

There were a few posts after this because of my STRENUOUS objection below.

I still think we should enable threads somehow on this platform.


--On Monday, March 22, 2004 11:14:59 -0600 Larry Rosenman <[EMAIL PROTECTED]> wrote:

--On Monday, March 22, 2004 09:52:54 -0500 Bruce Momjian
<[EMAIL PROTECTED]> wrote:

Bruce Momjian wrote:

Larry Rosenman wrote:
>  The a.out (not any library) should be linked with -Kpthread (not
> -lpthread).
> This will force libthread to be linked in the right order relative to
> libc, libC, networking libraries, etc.
>
> In other words, the entire application either is or is not linked with
> threads; it's not a property of an individual library.
>
>
> SO, IF we are using the threads flags, we need to use them on ALL
> libpq-using programs, ours or the users.

Seems we have a few options for making threaded libpq on Unixware:

o remove thread-safe SIGPIPE code, which calls thread library

o create a threaded and non-threaded libpq library

        o  add a libpq function that enables threading, and do dynamic
linking of thread calls based on that function

        o  Add thread flags to all builds on that platform, including
the backend

        o  Add the ability to specify compile/link flags for everything
but the backend

As I remember, libcrypt used to be required by all libpq builds on
various platforms.   This seems to be a similar case.

I think the last option might be the best.  Somehow create different
cppflags/libs for the backend and non-backend programs.

One other option is to disable threads on this platform for 7.5 unless
we find another platforms that need this to use threads.  That is the
direction I will take for the moment.  If someone needs a threaded libpq
on this platform, then can enable threads, compile libpq alone, and
rename it with a thread extension.

This will be a REGRESSION from 7.4. I object STRENUOUSLY to this tack.

I want to see threads enabled for this platform since it is a threaded
kernel.

What do we have to do to get there?   What code do I need to write for
y'all?

LER

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--
Larry Rosenman                     http://www.lerctr.org/~ler
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