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From:	Rugxulo <rugxulo AT gmail DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: pthreads compilation error
Date:	Sun, 25 Dec 2011 23:23:34 -0800 (PST)
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Reply-To:	djgpp AT delorie DOT com

Hi,

On Dec 26, 12:10 am, jimm <jmich DOT  DOT  DOT  AT yahoo DOT com> wrote:
>
> Sun 12/25/2011 22:03:40.43|C:\prj\test\djgpp|>gpp -lpth -Wall -W -
> Wextra -v -save-temps -s -Map=pthreads.map -oa.exe pthreads.cpp

Isn't GNU ld.exe a bit picky about link order? You may want to keep -
lpth to the end, though that probably won't solve your problem here.

BTW, last I checked, -W is the same as -Wextra, just older / obsolete.
And a.exe is already default (along with a.out), so I don't see why
you'd want to specify that (unless you only wanted a.exe and nothing
else).

> In file included from pthreads.cpp:1:0:
> c:/djc462~1/include/pthread.h:113:53: fatal error: sys/socket.h: No
> such file or directory (ENOENT)
> compilation terminated.

You need libsocket (/current/v2tk/ls080*.zip) or Watt-32. I'm not sure
the former even fully works (anymore, if ever), so I would suggest
Watt-32 from http://home.broadpark.no/~gvanem/

> Sun 12/25/2011 22:05:23.65|C:\prj\test\djgpp|>
>
> source code is an example from https://computing.llnl.gov/tutorials/pthreads/#Abstract

Okay, but you're asking for complications which I can't help with. I'm
don't grok multi-threading, sorry. It's a minefield.

> #include <pthread.h> //in djgpp it's pthread.h, not pthreads.h like in
> the example.

All the examples I see at the URL above list it as indeed "pthread.h",
no 's'.

> I extracted pth*.zip
>
> 1. & 2. djgpp does not like the standard gcc compiler switch -XLinker

See latest GCC 4.6.2 manual, section 3.13 "Options for Linking":

"-Xlinker option"  (perhaps your capital 'L' confused it?)

http://gcc.gnu.org/onlinedocs/gcc-4.6.2/gcc/Link-Options.html#Link-Options

> or the standard -pthreads which is supposed to be used with
> pthreads.

No, of course that wouldn't be enabled, that presumably means GCC
itself uses threads. Even DJGPP's Ada (GNAT*) doesn't support threads
anymore.   :-(

> 3. I didn't look at the standard, but I think the header is supposed
> to be called pthreads.h, not pthread.h, and pthreads.h is an 8.3
> filename.

Not according to your example above.  ;-)   But anyways, what you're
using is GNU pth, which has (IIRC) both standard POSIX and its own
API. Anyways, GNU pth is portable but cooperative only. It's somewhat
limited (and our port is buggy, IIRC), so caveat emptor.

http://www.gnu.org/software/pth/

You may have better luck trying FSU Pthreads (see p7zip 9.13) and/or
the examples bundled with the Minix version of FSU (used with
permission):

http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/file/7zip/9.13/p7z913.zip

http://minix1.woodhull.com/pub/contrib/champoll.txt
http://minix1.woodhull.com/pub/contrib/champoll.tar.Z

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