Re: [PATCH] OpenBSD -pthread fix

[Peter O'Gorman]

Bob Friesenhahn wrote:
> I think so.  The story gets worse.  These are the threads related
> options that the ACX_PTHREAD macro from the Autoconf archive checks
> for:
>
>   -Kthread -kthread -pthread -pthreads -mthreads --thread-safe -mt

It looks like there are the beginnings of thread-safe support in libtool 
already:
 * The libtool script accepts the -thread-safe flag.
 * libtool puts the "thread_safe_flag_spec" var into the script.

Unfortunately the thread_safe_flag_spec does not appear to get set to 
anything, and the -thread-safe flag does very little.

It seems to me that working from what is there already is the way to go 
here. We need to put a test into libtool.m4 to set thread_safe_flag_spec 
and implement it in ltmain.in. Of course we will also have to make 
-pthread synonymous with -thread-safe, as well as all those other flags 
you mention :(, and make sure that -thread-safe gets put into 
dependency_libs.

Cezary, I am not going to apply your patch, I hope to have the above 
implemented soon (but I certainly will not complain of you beat me to it).

Still leaves us with the problem of what to do with other unrecognized 
flags in dependency_libs from older libtools.

Thanks,
Peter