lua_getglobal(L, "simgrid"); /* simgrid */
luaL_newlib(L, host_functions); /* simgrid simgrid.host */
lua_setfield(L, -2, "host"); /* simgrid */
lua_getglobal(L, "simgrid"); /* simgrid */
luaL_newlib(L, host_functions); /* simgrid simgrid.host */
lua_setfield(L, -2, "host"); /* simgrid */