Re: NPTL auto detection

[Dag Wieers]

Hi,

I'm not subscribed to this list but noticed the NPTL discussion on Wine 
Traffic #170. I saw a lot of people mentioning to make it a compile-time 
option, but no one with a definitive runtime check.

Valgrind went through the same problem and I proposed a solution on their 
list. AFAIK they're not using it, they still have a run-time parameter 
instead of auto-detecting it on loadtime.

The discussion is here:

http://sourceforge.net/mailarchive/forum.php?thread_id=2027895&forum_id=...
    http://sourceforge.net/mailarchive/forum.php?thread_id=2052985&forum_id=...

And a couple of lines to check what threading library is used:

//#define _XOPEN_SOURCE
    #define _POSIX_C_SOURCE 2
    #include <unistd.h>
    #include <stdio.h>

int main(void) {
            char *buf; size_t n;

n=confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, (size_t) 0);
            if ((buf = (char *) malloc(n)) == NULL) abort();
            confstr(_CS_GNU_LIBPTHREAD_VERSION, buf, n);
            fprintf(stdout, "%s\n", buf); exit(0);
    }

Which is basicly the same as:

getconf GNU_LIBPTHREAD_VERSION

I'm not sure if this is new information, but I didn't see it mentioned 
anywhere.

Kind regards,
--   dag wieers,  [e-mail],  http://dag.wieers.com/   --
�Any errors in spelling, tact or fact are transmission errors�

NPTL auto detection

[Mike Hearn]

Perhaps of more interest is this:

* Sun Apr 06 2003 Jakub Jelinek  2.3.2-4.80.5
   - make sure all calls to __errno_location() and __h_errno_location()
     jump through .plt to make older wine happy

Not sure if it's in CVS glibc or not, somebody asked, I'll update the
list on the answer. It'd be a bit annoying if after all that work they
change glibc again to unbreak it.

On Sat, 2003-05-17 at 05:22, Dag Wieers wrote:
> Hi,
>
> I'm not subscribed to this list but noticed the NPTL discussion on Wine 
> Traffic #170. I saw a lot of people mentioning to make it a compile-time 
> option, but no one with a definitive runtime check.
>
> Valgrind went through the same problem and I proposed a solution on their 
> list. AFAIK they're not using it, they still have a run-time parameter 
> instead of auto-detecting it on loadtime.
>
> The discussion is here:
>
> http://sourceforge.net/mailarchive/forum.php?thread_id=2027895&forum_id=...
>    http://sourceforge.net/mailarchive/forum.php?thread_id=2052985&forum_id=...
>
> And a couple of lines to check what threading library is used:
>
> //#define _XOPEN_SOURCE
>    #define _POSIX_C_SOURCE 2
>    #include <unistd.h>
>    #include <stdio.h>
>
> int main(void) {
>            char *buf; size_t n;
>        n=confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, (size_t) 0);
>        if ((buf = (char *) malloc(n)) == NULL) abort();
>        confstr(_CS_GNU_LIBPTHREAD_VERSION, buf, n);
>        fprintf(stdout, "%s\n", buf); exit(0);
>
> }
>
> Which is basicly the same as:
>
> getconf GNU_LIBPTHREAD_VERSION
>
> I'm not sure if this is new information, but I didn't see it mentioned 
> anywhere.
>
> Kind regards,
> --   dag wieers,  [e-mail],  http://dag.wieers.com/   --
> «Any errors in spelling, tact or fact are transmission errors»