Hi there! I have an error when building PyTorch from source in CentOS 7. I’d appreciate if you could help me  . This is my build summary:
-- 
-- ******** Summary ********
-- General:
--   CMake version         : 3.18.2
--   CMake command         : /home/USER/anaconda3/bin/cmake
--   System                : Linux
--   C++ compiler          : /opt/rh/devtoolset-9/root/usr/bin/c++
--   C++ compiler id       : GNU
--   C++ compiler version  : 9.3.1
--   Using ccache if found : ON
--   Found ccache          : CCACHE_PROGRAM-NOTFOUND
--   CXX flags             :  -Wno-deprecated -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -fopenmp -DNDEBUG -DUSE_KINETO -DUSE_FBGEMM -DUSE_QNNPACK -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -O2 -fPIC -Wno-narrowing -Wall -Wextra -Werror=return-type -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-unused-variable -Wno-unused-function -Wno-unused-result -Wno-unused-local-typedefs -Wno-strict-overflow -Wno-strict-aliasing -Wno-error=deprecated-declarations -Wno-stringop-overflow -Wno-psabi -Wno-error=pedantic -Wno-error=redundant-decls -Wno-error=old-style-cast -fdiagnostics-color=always -faligned-new -Wno-unused-but-set-variable -Wno-maybe-uninitialized -fno-math-errno -fno-trapping-math -Werror=format -Werror=cast-function-type -Wno-stringop-overflow
--   Build type            : Release
--   Compile definitions   : TH_BLAS_MKL;ONNX_ML=1;ONNXIFI_ENABLE_EXT=1;ONNX_NAMESPACE=onnx_torch;IDEEP_USE_MKL;HAVE_MMAP=1;_FILE_OFFSET_BITS=64;HAVE_SHM_OPEN=1;HAVE_SHM_UNLINK=1;HAVE_MALLOC_USABLE_SIZE=1;USE_EXTERNAL_MZCRC;MINIZ_DISABLE_ZIP_READER_CRC32_CHECKS
--   CMAKE_PREFIX_PATH     : /home/USER/anaconda3
--   CMAKE_INSTALL_PREFIX  : /home/USER/pytorch/torch
-- 
--   TORCH_VERSION         : 1.9.0
--   CAFFE2_VERSION        : 1.9.0
--   BUILD_CAFFE2          : ON
--   BUILD_CAFFE2_OPS      : ON
--   BUILD_CAFFE2_MOBILE   : OFF
--   BUILD_STATIC_RUNTIME_BENCHMARK: OFF
--   BUILD_TENSOREXPR_BENCHMARK: OFF
--   BUILD_BINARY          : OFF
--   BUILD_CUSTOM_PROTOBUF : ON
--     Link local protobuf : ON
--   BUILD_DOCS            : OFF
--   BUILD_PYTHON          : True
--     Python version      : 3.8.5
--     Python executable   : /home/USER/anaconda3/bin/python
--     Pythonlibs version  : 3.8.5
--     Python library      : /home/USER/anaconda3/lib/libpython3.8.so.1.0
--     Python includes     : /home/USER/anaconda3/include/python3.8
--     Python site-packages: lib/python3.8/site-packages
--   BUILD_SHARED_LIBS     : ON
--   CAFFE2_USE_MSVC_STATIC_RUNTIME     : OFF
--   BUILD_TEST            : True
--   BUILD_JNI             : OFF
--   BUILD_MOBILE_AUTOGRAD : OFF
--   BUILD_LITE_INTERPRETER: OFF
--   INTERN_BUILD_MOBILE   : 
--   USE_BLAS              : 1
--     BLAS                : mkl
--   USE_LAPACK            : 1
--     LAPACK              : mkl
--   USE_ASAN              : OFF
--   USE_CPP_CODE_COVERAGE : OFF
--   USE_CUDA              : OFF
--   USE_ROCM              : OFF
--   USE_EIGEN_FOR_BLAS    : 
--   USE_FBGEMM            : ON
--     USE_FAKELOWP          : OFF
--   USE_KINETO            : ON
--   USE_FFMPEG            : OFF
--   USE_GFLAGS            : OFF
--   USE_GLOG              : OFF
--   USE_LEVELDB           : OFF
--   USE_LITE_PROTO        : OFF
--   USE_LMDB              : OFF
--   USE_METAL             : OFF
--   USE_PYTORCH_METAL     : OFF
--   USE_FFTW              : OFF
--   USE_MKL               : ON
--   USE_MKLDNN            : ON
--   USE_MKLDNN_CBLAS      : OFF
--   USE_NCCL              : OFF
--   USE_NNPACK            : ON
--   USE_NUMPY             : ON
--   USE_OBSERVERS         : ON
--   USE_OPENCL            : OFF
--   USE_OPENCV            : OFF
--   USE_OPENMP            : ON
--   USE_TBB               : OFF
--   USE_VULKAN            : OFF
--   USE_PROF              : OFF
--   USE_QNNPACK           : ON
--   USE_PYTORCH_QNNPACK   : ON
--   USE_REDIS             : OFF
--   USE_ROCKSDB           : OFF
--   USE_ZMQ               : OFF
--   USE_DISTRIBUTED       : ON
--     USE_MPI             : OFF
--     USE_GLOO            : ON
--     USE_TENSORPIPE      : ON
--   USE_DEPLOY           : OFF
--   Public Dependencies  : Threads::Threads;caffe2::mkl;caffe2::mkldnn
--   Private Dependencies : pthreadpool;cpuinfo;qnnpack;pytorch_qnnpack;nnpack;XNNPACK;fbgemm;fp16;gloo;tensorpipe;aten_op_header_gen;foxi_loader;rt;fmt::fmt-header-only;kineto;gcc_s;gcc;dl

OS:
Operating System: CentOS Linux 7 (Core)
Kernel: Linux 3.10.0-514.6.2.el7.x86_64
Architecture: x86-64

GCC version:
gcc (GCC) 9.3.1 20200408 (Red Hat 9.3.1-2)

Python version:
Python 3.8.5

CMake version:
cmake version 3.18.2

Conda version:
conda 4.10.1

Error:
-- Generating done
-- Build files have been written to: /home/USER/pytorch/build
cmake --build . --target install --config Release -- -j 8
[2248/5425] Building CXX object third_party/tensorpipe/tensorpipe/CMakeFiles/tensorpipe.dir/common/shm_segment.cc.o
FAILED: third_party/tensorpipe/tensorpipe/CMakeFiles/tensorpipe.dir/common/shm_segment.cc.o 
/opt/rh/devtoolset-9/root/usr/bin/c++ -DTH_BLAS_MKL -I../cmake/../third_party/benchmark/include -I../third_party/tensorpipe -Ithird_party/tensorpipe -I../third_party/tensorpipe/third_party/libnop/include -I../third_party/tensorpipe/third_party/libuv/include -isystem third_party/gloo -isystem ../cmake/../third_party/gloo -isystem ../cmake/../third_party/googletest/googlemock/include -isystem ../cmake/../third_party/googletest/googletest/include -isystem ../third_party/protobuf/src -isystem /home/USER/anaconda3/include -isystem ../third_party/gemmlowp -isystem ../third_party/neon2sse -isystem ../third_party/XNNPACK/include -isystem ../third_party -isystem ../cmake/../third_party/eigen -isystem /home/USER/anaconda3/include/python3.8 -isystem /home/USER/anaconda3/lib/python3.8/site-packages/numpy/core/include -isystem ../cmake/../third_party/pybind11/include -Wno-deprecated -fvisibility-inlines-hidden -DUSE_PTHREADPOOL -fopenmp -O3 -DNDEBUG -fPIC -DCAFFE2_USE_GLOO -std=gnu++14 -MD -MT third_party/tensorpipe/tensorpipe/CMakeFiles/tensorpipe.dir/common/shm_segment.cc.o -MF third_party/tensorpipe/tensorpipe/CMakeFiles/tensorpipe.dir/common/shm_segment.cc.o.d -o third_party/tensorpipe/tensorpipe/CMakeFiles/tensorpipe.dir/common/shm_segment.cc.o -c ../third_party/tensorpipe/tensorpipe/common/shm_segment.cc
../third_party/tensorpipe/tensorpipe/common/shm_segment.cc: In function ‘std::tuple<tensorpipe::Error, tensorpipe::Fd> tensorpipe::{anonymous}::openTmpfileInDevShm()’:
../third_party/tensorpipe/tensorpipe/common/shm_segment.cc:79:15: error: ‘O_TMPFILE’ was not declared in this scope
   79 |   int flags = O_TMPFILE | O_EXCL | O_RDWR | O_CLOEXEC;
      |               ^~~~~~~~~
[2255/5425] Building CXX object third_party/fbgemm/CMakeFiles/fbgemm_avx2.dir/src/FbgemmI8Depthwise3DAvx2.cc.o
ninja: build stopped: subcommand failed.