Re: Building with pthreads in Digital Unix 4.0 (ITS#62)

[Kurt@OpenLDAP.org]

I've made some changes that should resolve pthread detections issues
on Digital Unix 4.0.

In the meantime, I suggest (if using the vendor supplied compiler)
	CFLAGS=-pthread; export CFLAGS
	./configure --with-threads=posix

If using something else (like gcc):
	CFLAGS=; export CFLAGS
	CPPFLAGS=-D_REENTRANT; export CPPFLAGS
	LIBS="-lpthread -lmach -lexc"; export LIBS
	./configure --with-threads=posix

If this doesn't work, try without the -lmach library.

I do NOT recommend using "-threads" nor "-lpthreads" as this will cause
older posix routines to be included.  (In fact, this is why the test
failed).

Note: this will build the complete system with threads (instead of just
the threaded components).

See Also: 
http://www.unix.digital.com/faqs/publications/base_doc/DOCUMENTATION/V40E_HTML/AQ2DPDTK/DOCU_020.HTM#heading_a.2.2


If you are using the vendor supplied compiler.  
At 09:39 PM 2/1/99 GMT, Ashley.W.Frost@williams.edu wrote:
>
>BTW, thank you for your work on this project.  Its exciting and a
>wonderful service to the community.
>
>Further information regarding Kurt's email follows.
>
>Regards,
>
>-Ashley
>
>
>On Mon, 1 Feb 1999, Kurt D. Zeilenga wrote:
>
>> At 08:57 PM 2/1/99 GMT, Ashley.W.Frost@williams.edu wrote:
>> >Full_Name: Ashley Frost
>> >Version: 1.1.4
>> >OS: Digital Unix 4.0d
>> >URL: 
>> >Submission from: (NULL) (137.165.10.21)
>> >
>> >
>> >I couldn't find this information anywhere in the FAQ or mailing list archives,
>> >so I'm offering it to anyone who is having trouble with ./configure and pthread
>> >support for Digital Unix.  It would be especially helpful under the Platform 
>> >Hints in a section for Digital Unix.
>> 
>> You are, of course, welcomed to add a subcategory for Digital UNIX in the
>> platform hints section of the faq-o-matic and then add your 'new answer.'
>
>I didn't realize you allowed offsite people to modify the faq-o-matic,
>although a second look shows this to be true.  
>
>I also realize that this answer looks a lot like some of the other answers
>for other OS's regarding pthreads, however it is slightly different and
>took a little digging through the man pages on DU.  If this had been in
>there, it would have saved me some trouble right off the bat.
>
>> >If configure stops with the error:
>> >
>> >       checking if pthread_create() works... no
>> >       configure: error: pthread.h and pthread_create are not compatible
>> 
>> Where did it find the incompatible pthread_create() ?
>
>
>Here is the tail of the config.log:
>
>configure:4333: checking if pthread_create() works
>configure:4365: cc -o conftest -g   conftest.c  -lpthreads -lmach -lexc
>-lc_r  1>&5
>ld:
>Unresolved:
>__pthread_create
>configure: failed program was:
>#line 4342 "configure"
>#include "confdefs.h"
>
>#include <pthread.h>
>#ifndef NULL
>#define NULL (void*)0
>#endif
>
>static void *task(p)
>        void *p;
>{
>        return (void *) (p == NULL);
>}
>
>int main(argc, argv)
>        int argc;
>        char **argv;
>{
>        pthread_t t;
>        exit(pthread_create(&t, NULL, task, NULL));
>}
>
>
>-Ashley
>
>
>
>