PATCH: Allow gcc/gthr* to be compiled by C++ as well as C

[Benjamin Kosnik]

Loren, I'm for this patch and would like to see it in 
(along with your other work WRT moving more threading config bits to 
toplevel and making libstdc++-v3 use them). It seems pretty simple and 
non-invasive.

I don't really have the authority to approve this patch though: 
perhaps Richard or Alexandre could?

-benjamin

On Wed, 30 May 2001, Loren James Rittle wrote:

> Both libstdc++-v3/libsupc++/eh_alloc.cc and [...]/eh_globals.cc were
> written to compile against the gcc/gthr.h abstraction layer, but the
> configuration was hosed at some point and it now always maps to the
> gcc/gthr-single.h configuration even if --enable-threads was provided
> while configuring libstdc++-v3.  The upshot is that C++ EH is broken
> in light of multi-threading.  This is a regression from 2.95.X on at
> least some platforms.
> 
> Only the gcc/gthr-posix.h change has been fully bootstrapped on
> multiple architectures.  Changes to other files are identical in form.
> 
> David originally caught this problem and provided a patch for
> gthr-posix.h bundled in other work.  Approval for mainline and 3.0
> branch is sought since the patch to actually fix libsupc++/eh_*.cc is
> up next and requires this trivial patch.
> 
> 2001-05-30  Loren J. Rittle  <ljrittle@acm.org>
> 	    John David Anglin  <dave@hiauly1.hia.nrc.ca>
> 
> 	* gthr-posix.h (__gthread_active_ptr): Cast function pointer
> 	to target type to allow ISO C++ compiler to accept it.
> 	* gthr-dce.h (__gthread_active_ptr): Likewise.
> 	* gthr-solaris.h (__gthread_active_ptr): Likewise.
> 
> Index: gcc/gthr-dce.h
> ===================================================================
> RCS file: /cvs/gcc/egcs/gcc/gthr-dce.h,v
> retrieving revision 1.10
> diff -c -r1.10 gthr-dce.h
> *** gthr-dce.h	2001/05/26 01:31:34	1.10
> --- gthr-dce.h	2001/05/30 11:14:11
> ***************
> *** 79,85 ****
>   #pragma weak pthread_yield
>   #endif
>   
> ! static void *__gthread_active_ptr = &pthread_create;
>   
>   static inline int
>   __gthread_active_p (void)
> --- 79,85 ----
>   #pragma weak pthread_yield
>   #endif
>   
> ! static void *__gthread_active_ptr = (void *) &pthread_create;
>   
>   static inline int
>   __gthread_active_p (void)
> Index: gcc/gthr-posix.h
> ===================================================================
> RCS file: /cvs/gcc/egcs/gcc/gthr-posix.h,v
> retrieving revision 1.13
> diff -c -r1.13 gthr-posix.h
> *** gthr-posix.h	2001/05/26 01:31:34	1.13
> --- gthr-posix.h	2001/05/30 11:14:11
> ***************
> *** 75,81 ****
>   #pragma weak pthread_setschedparam
>   #endif
>   
> ! static void *__gthread_active_ptr = &pthread_create;
>   
>   static inline int
>   __gthread_active_p (void)
> --- 75,81 ----
>   #pragma weak pthread_setschedparam
>   #endif
>   
> ! static void *__gthread_active_ptr = (void *) &pthread_create;
>   
>   static inline int
>   __gthread_active_p (void)
> Index: gcc/gthr-solaris.h
> ===================================================================
> RCS file: /cvs/gcc/egcs/gcc/gthr-solaris.h,v
> retrieving revision 1.8
> diff -c -r1.8 gthr-solaris.h
> *** gthr-solaris.h	2001/05/26 01:31:34	1.8
> --- gthr-solaris.h	2001/05/30 11:14:11
> ***************
> *** 81,87 ****
>   /* This will not actually work in Solaris 2.5, since libc contains
>      dummy symbols of all thr_* routines. */
>   
> ! static void *__gthread_active_ptr = &thr_create;
>   
>   static inline int
>   __gthread_active_p (void)
> --- 81,87 ----
>   /* This will not actually work in Solaris 2.5, since libc contains
>      dummy symbols of all thr_* routines. */
>   
> ! static void *__gthread_active_ptr = (void *) &thr_create;
>   
>   static inline int
>   __gthread_active_p (void)
>