This shouldn't be in the common options, it's already added for the
relevant targets using dg-additional-options.
libstdc++-v3/ChangeLog:
* testsuite/30_threads/jthread/jthread.cc: Remove -pthread from
dg-options.
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
-// { dg-options "-std=gnu++2a -pthread" }
+// { dg-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
// { dg-add-options libatomic }
// { dg-additional-options "-pthread" { target pthread } }