Re: [Jack-Devel] Problem using Jack2 with MinGW and pthreads

Le 21 févr. 2011 à 10:52, Tim Mayberry a écrit :

> I've been working on porting an existing application to windows using
> the MinGW compiler. The application uses both pthreads via
> (http://sourceware.org/pthreads-win32) and the jack API via jack2
> 
> The problem I'm having(I think) is that pthread_t is getting redefined
> via jack/systemdeps.h
> 
> The relevant section:
> 
> #elif __MINGW32__   /* MINGW */
>    #include <stdint.h>
>    #include <sys/types.h>
>    #ifndef pthread_t
>        typedef HANDLE pthread_t;
>    #endif
> #else
> 
> So if jack.h and pthread.h are included in the same source file I get
> this error:
> 
> systemdeps.h:46:24: error: conflicting declaration 'typedef void* pthread_t'
> pthread.h:571:24: error: 'pthread_t' has a previous declaration as
> 'typedef struct ptw32_handle_t pthread_t'
> 
> My first thought was to define pthread_t to what it is in pthread.h
> before including jack.h so that there aren't conflicting declarations
> and then undefine it again before including pthread.h so that I'm not
> redefining pthread_t in pthread.h to something broken.
> 
> This seemed silly to me and probably breaks stuff so I was wondering
> am I missing something? Is it intended to be able to use the MinGW
> compiler to compile jack2 and use a pthreads implementation and if so
> how?
> 
> Thanks,
> 
> Tim.

The thing is that the POSIX jack implementations (Linux and OSX) use "pthread_t" type and this type appears in the public jack headers. Then the "pthread_t" type has to be defined for Windows, and the jack/systemdeps.h is supposed to define it only if not yet defined....

So this seems to fail.... Have you included "pthread.h" *before* "jack.h"?

Stéphane

1298282615.30735_0.ltw:2,a <E51B8BD8-1462-4C2E-8F21-A679C54A9800 at grame dot fr>