gnu: openmpi: Configure without builtin atomics.

See https://www.mail-archive.com/users@lists.open-mpi.org//msg31400.html



* gnu/packages/mpi.scm (openmpi)[arguments]: Don't configure with
--enable-builtin-atomics.

Signed-off-by: Ludovic Courtès <ludovic.courtes@inria.fr>

gnu/packages/mpi.scm

@@ -132,9 +132,7 @@ (define-public openmpi
      `(("pkg-config" ,pkg-config)
        ("perl" ,perl)))
     (arguments
-     `(#:configure-flags `("--enable-builtin-atomics"
-
-                           "--enable-mpi-ext=affinity" ;cr doesn't work
+     `(#:configure-flags `("--enable-mpi-ext=affinity" ;cr doesn't work
                            "--enable-memchecker"
                            "--with-sge"