[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: autoconf, sendmail, and pthreads
From: |
Steven G. Johnson |
Subject: |
Re: autoconf, sendmail, and pthreads |
Date: |
Thu, 21 Dec 2000 16:20:58 -0500 (EST) |
On Thu, 21 Dec 2000 address@hidden wrote:
> > there now. I haven't heard of any problems on FreeBSD, and in fact I have
> > specifically tested it on FreeBSD systems in the past.
>
> We must add -pthread to complier flags there
Already done, although the macro prefers kernel threads (-kthread and
-llthread) to the userland -pthreads on that system. Perhaps you haven't
looked at a recent version of the macro.
> -mt - is compiler flag for Sun C/C++, which:
> - tell compiler to generate thread_safe code.
> - define _REENTRANT
> - add libthread.so to default libraries.
Thanks, I'll add a check for -mt on Solaris before -lpthread.
Or, wait a minute, are you sure that -mt links in -lthread and not
-lpthread? The former are SunOS threads, as I recall (thr_*) and not
Posix threads (pthread_*).
Although I suppose it is safe to try -mt in any case....if it doesn't link
in Posix threads, then the link test (which tries to link to
pthread_create & friends) will fail and the macro will move on to
-lpthread.
> Becouse pthreads require -lposix4 for nanosleep,
> pthread_* functions are defined in libthread
Is that required for any standard use of *just* the pthreads API? I know
I've used threads functions on Solaris before without linking that.
(For ACX_PTHREAD, I don't care about users calling nanosleep directly;
this is just a generic POSIX.1b function and not a pthreads function.)
> And I'm not sure, that defining _POSIX_THRAD_SEMANTICS is work
> for autoconf, may be this is must be work of application programmer.
Well, I already define -D_THREAD_SAFE on FreeBSD (and AIX), and I think
that this is appropriate for autoconfing (although it is difficult to test
for and I have to resort to looking directly at the system name, sigh...)
Actually, ACX_PTHREAD already defines -D_REENTRANT on Solaris (although
you tell me that -mt does this too). Are you sure that
-D_POSIX_THREAD_SEMANTICS is required, or is -D_REENTRANT equivalent?
Can you send me the relevant section of the documentation?
Thanks,
Steven
- autoconf, sendmail, and pthreads, Lars Hecking, 2000/12/19
- Re: autoconf, sendmail, and pthreads, Steven G. Johnson, 2000/12/20
- Re: autoconf, sendmail, and pthreads, rssh, 2000/12/21
- Re: autoconf, sendmail, and pthreads, Bob Friesenhahn, 2000/12/21
- Re: autoconf, sendmail, and pthreads, Ruslan Shevchenko, 2000/12/21
- Re: autoconf, sendmail, and pthreads, Bob Friesenhahn, 2000/12/21
- Re: autoconf, sendmail, and pthreads, Steven G. Johnson, 2000/12/21
- Re: autoconf, sendmail, and pthreads, Ganesan Rajagopal, 2000/12/21
- Re: autoconf, sendmail, and pthreads,
Steven G. Johnson <=