Re: [PATCH. fortran] Add automatic linking to caf_shmem using -fcoarray=shared

On 5/9/26 2:12 PM, Andre Vehreschild wrote:
> Hi Jerry,
> 
> shouldn't that be dg-do link in testcase? Does dg-do compile also link?
> 
> Regards,
> Andre
> 
> Andre Vehreschild

I adjusted the ChangeLog and changed the dg-do compilke to dg-do link.

Retested all.

Thanks for comment.

Jerry

Pending on approval.

--- snip ---

commit 0f7a6f628a6b9f09a663a064477da4d747a776a1 (HEAD -> master)
Author: Jerry DeLisle <[email protected]>
Date:   Sat May 9 11:49:21 2026 -0700

     fortran: Add -fcoarray=shared option to auto-link -lcaf_shmem

     The new -fcoarray=shared option provides a convenient shorthand for
     the common invocation -fcoarray=lib -lcaf_shmem.  The driver transforms
     -fcoarray=shared into -fcoarray=lib for the frontend and automatically
     appends -lcaf_shmem to the link command.  Existing uses of -fcoarray=lib
     are unaffected.

     Assisted by: Claude Sonnet 4.6

     gcc/:

             * flag-types.h (gfc_fcoarray): Add GFC_FCOARRAY_SHARED.

     gcc/fortran/:

             * lang.opt (fcoarray=): Add shared enum value; update help text.
             * gfortranspec.cc (CAF_SHMEM_LIBRARY): New macro.
             (lang_specific_driver): Detect -fcoarray=shared in first pass and
             set need_caf_shmem flag.  In second pass, transform -fcoarray=shared
             to -fcoarray=lib for cc1.  Append -lcaf_shmem when need_caf_shmem
             is set and linking is active.

     gcc/testsuite/:

             * gfortran.dg/coarray_51.f90: New test.


Addeed in the Assisted by words.


--- snip ---

diff --git a/gcc/testsuite/gfortran.dg/coarray_51.f90 
b/gcc/testsuite/gfortran.dg/coarray_51.f90
new file mode 100644
index 00000000000..da8a270c262
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/coarray_51.f90
@@ -0,0 +1,15 @@
+! { dg-do link }
+! { dg-options "-fcoarray=shared -fdump-tree-original" }
+!
  --- snipped ---