Fix build with recent simgrid by failing at runtime

configure.ac

@@ -166,7 +166,7 @@ if test x$enable_simgrid = xyes ; then
 	AC_CHECK_HEADERS([xbt/synchro.h], [AC_DEFINE([STARPU_HAVE_XBT_SYNCHRO_H], [1], [Define to 1 if you have synchro.h in xbt/.])])
 	AC_CHECK_TYPES([smx_actor_t], [AC_DEFINE([STARPU_HAVE_SMX_ACTOR_T], [1], [Define to 1 if you have the smx_actor_t type.])], [], [[#include <simgrid/simix.h>]])
    	AC_CHECK_FUNCS([MSG_process_join MSG_process_attach MSG_get_as_by_name MSG_environment_get_routing_root MSG_host_get_speed MSG_process_self_name])
-	AC_CHECK_FUNCS([xbt_mutex_try_acquire smpi_process_set_user_data sg_link_name sg_host_route sg_host_self])
+	AC_CHECK_FUNCS([xbt_mutex_try_acquire smpi_process_set_user_data sg_link_name sg_host_route sg_host_self simcall_process_create])
 	AC_CHECK_FUNCS([xbt_barrier_init], [AC_DEFINE([STARPU_SIMGRID_HAVE_XBT_BARRIER_INIT], [1], [Define to 1 if you have the `xbt_barrier_init' function.])])
 	AC_CHECK_DECLS([smpi_process_set_user_data], [], [], [[#include <smpi/smpi.h>]])
 	AC_CHECK_FUNCS([SIMIX_process_get_code], [AC_DEFINE([STARPU_SIMGRID_HAVE_SIMIX_PROCESS_GET_CODE], [1], [Define to 1 if you have the `SIMIX_process_get_code' function.])])

src/core/simgrid.c

@@ -1123,6 +1123,7 @@ static int _starpu_simgrid_xbt_thread_create_wrapper(int argc STARPU_ATTRIBUTE_U
 /* See https://github.com/simgrid/simgrid/issues/139 */
 void _starpu_simgrid_xbt_thread_create(const char *name, void_f_pvoid_t code, void *param)
 {
+#ifdef HAVE_SIMCALL_PROCESS_CREATE
 #ifdef HAVE_SMX_ACTOR_T
 	smx_actor_t process STARPU_ATTRIBUTE_UNUSED;
 #else
@@ -1163,6 +1164,9 @@ void _starpu_simgrid_xbt_thread_create(const char *name, void_f_pvoid_t code, vo
 				 , 0
 #endif
 				 );
+#else
+	STARPU_ABORT_MSG("Can't run StarPU-Simgrid-MPI with a Simgrid version which does not provide simcall_process_create and does not fix https://github.com/simgrid/simgrid/issues/139 , sorry.");
+#endif
 }
 
 #if 0