[GitHub] asitstands commented on issue #11417: libomp.so dependency (need REAL fix)

[GitBox <gi...@apache.org>]

asitstands commented on issue #11417: libomp.so dependency (need REAL fix)
URL: https://github.com/apache/incubator-mxnet/issues/11417#issuecomment-412777877
 
 
   Any update on this issue? `libomp.so` in `3rdparty` causes a segfault in the `build.ubuntu_gpu` docker environment for the CI testing. The cmake build passes all unit tests for gpu but a segfault occurs at the end. Here is the stack trace.
   ```
   #0  0x00007efd8c17600e in __kmp_dephash_free_entries () from /work/build/3rdparty/openmp/runtime/src/libomp.so
   #1  0x00007efd8c1761a1 in __kmp_dephash_free () from /work/build/3rdparty/openmp/runtime/src/libomp.so
   #2  0x00007efd8c1394f9 in __kmp_free_implicit_task () from /work/build/3rdparty/openmp/runtime/src/libomp.so
   #3  0x00007efd8c121c6f in __kmp_reap_thread(kmp_info*, int) () from /work/build/3rdparty/openmp/runtime/src/libomp.so
   #4  0x00007efd8c129915 in __kmp_internal_end_library () from /work/build/3rdparty/openmp/runtime/src/libomp.so
   #5  0x00007efd93eb3de7 in _dl_fini () at dl-fini.c:235
   #6  0x00007efd938f5ff8 in __run_exit_handlers (status=0, listp=0x7efd93c805f8 <__exit_funcs>, 
       run_list_atexit=run_list_atexit@entry=true) at exit.c:82
   #7  0x00007efd938f6045 in __GI_exit (status=<optimized out>) at exit.c:104
   #8  0x000000000060db0f in Py_Exit ()
   #9  0x000000000060dbfa in ?? ()
   #10 0x000000000060dc66 in PyErr_PrintEx ()
   #11 0x000000000060ef29 in PyRun_SimpleFileExFlags ()
   #12 0x000000000063fb26 in Py_Main ()
   #13 0x00000000004cfeb1 in main ()
   ```
   If I remove the dependency on `libomp.so` and just use `-fopenmp`, the segfault does not occur. 
   

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