[PATCH] PR 125324 Fix - -fcoarray=shared should imply -pthread / gfortran.dg/coarray_51.f90 FAIL

[Jerry D]

[PING]

On 5/27/26 9:35 AM, Jerry D wrote:
> As stated in the PR, this issue is possibly related to the version of glibc 
> installed on some systems. I can't test this on so many systems, so I want to 
> see if the auto testers pick it up. The patch is fairly simple. I copied Tobias 
> as the original reporter.
> 
> Assisted by Claude Sonnet 4.6 to be clear. See attached.
> 
> OK for mainline? If accepted probably should be backported to 16.
> 
> Jerry
> 
> ---
> fortran: also link -lpthread when -fcoarray=shared is used
> 
>   [PR125324]
> 
> When the driver auto-links -lcaf_shmem for -fcoarray=shared it must also
> link -lpthread because the shmem CAF runtime uses POSIX threads internally.
> 
>      PR fortran/125324
> 
> gcc/fortran/ChangeLog:
> 
>      * gfortranspec.cc (lang_specific_driver): Also append -lpthread
>      when need_caf_shmem is set.
> 
> Assisted by: Claude Sonnet 4.6
> ---