Hello Pavan, Are you sure you're not passing -Wstack-usage? My Ubuntu 18.04 with latest gcc-7 (7.3.0-27ubuntu1~18.04) doesn't show any of those warnings.
It looks like all these warnings are caused by C99 variable-length arrays (except 2 that I don't understand). I know the kernel devs stopped using VLA recently, and it looks like C11 made them optional. But are we really supposed to stop using VLA already? Brice Le 25/02/2019 à 02:07, Balaji, Pavan via hwloc-users a écrit : > Folks, > > I'm getting the below build warnings with hwloc-2.0.3, gcc-7.3 on Ubuntu > (with -Wall -O2): > > ----8<---- > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/distances.c: > In function 'hwloc__groups_by_distances': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/distances.c:817:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc__groups_by_distances(struct hwloc_topology *topology, > ^~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology.c: > In function 'hwloc_propagate_symmetric_subtree': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology.c:2388:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc_propagate_symmetric_subtree(hwloc_topology_t topology, hwloc_obj_t > root) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-synthetic.c: > In function 'hwloc_synthetic_process_indexes': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-synthetic.c:71:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc_synthetic_process_indexes(struct hwloc_synthetic_backend_data_s *data, > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-xml.c: > In function 'hwloc__xml_export_object_contents': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-xml.c:1920:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc__xml_export_object_contents (hwloc__xml_export_state_t state, > hwloc_topology_t topology, hwloc_obj_t obj, unsigned long flags) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c: > In function 'hwloc_linux_get_area_membind': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c:1883:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc_linux_get_area_membind(hwloc_topology_t topology, const void *addr, > size_t len, hwloc_nodeset_t nodeset, hwloc_membind_policy_t *policy, int > flags __hwloc_attribute_unused) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c: > In function 'hwloc_linux_set_thisthread_membind': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c:1737:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc_linux_set_thisthread_membind(hwloc_topology_t topology, > hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c: > In function 'hwloc_linux_get_thisthread_membind': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c:1848:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc_linux_get_thisthread_membind(hwloc_topology_t topology, > hwloc_nodeset_t nodeset, hwloc_membind_policy_t *policy, int flags > __hwloc_attribute_unused) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c: > In function 'hwloc_linux__get_allowed_resources': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-linux.c:4426:13: > warning: stack usage might be unbounded [-Wstack-usage=] > static void hwloc_linux__get_allowed_resources(hwloc_topology_t topology, > const char *root_path, int root_fd, char **cpuset_namep) > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-x86.c: > In function 'cpuiddump_read': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-x86.c:69:1: > warning: stack usage might be unbounded [-Wstack-usage=] > cpuiddump_read(const char *dirpath, unsigned idx) > ^~~~~~~~~~~~~~ > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-x86.c: > In function 'hwloc_x86_component_instantiate': > ../../../../../../../../../mpich/src/pm/hydra/tools/topo/hwloc/hwloc/hwloc/topology-x86.c:1456:1: > warning: stack usage might be unbounded [-Wstack-usage=] > hwloc_x86_component_instantiate(struct hwloc_disc_component *component, > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ----8<---- > > -- Pavan > > _______________________________________________ > hwloc-users mailing list > hwloc-users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/hwloc-users _______________________________________________ hwloc-users mailing list hwloc-users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/hwloc-users
