Checklist:
yes

Bug report:
Hello I want to run existing test suites, so I run command:
pip3 install -e .
python3 -m pytest -v test/single/test_run.py

However, it occur errors, Actually, I am weird that why I run "pip3 install -e .", it does not install TensorFlow or other packages?

Collecting cloudpickle
Using cached cloudpickle-2.0.0-py3-none-any.whl (25 kB)
Collecting psutil
Using cached psutil-5.8.0-cp37-cp37m-manylinux2010_x86_64.whl (296 kB)
Collecting pyyaml
Using cached PyYAML-6.0-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (596 kB)
Collecting cffi>=1.4.0
Using cached cffi-1.15.0-cp37-cp37m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (427 kB)
Collecting pycparser
Using cached pycparser-2.21-py2.py3-none-any.whl (118 kB)
Installing collected packages: cloudpickle, psutil, pyyaml, pycparser, cffi, horovod
Running setup.py develop for horovod
ERROR: Command errored out with exit status 1:
command: /mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/mnt/zejun/smp/data/python_star_2000repo/horovod/setup.py'"'"'; file='"'"'/mnt/zejun/smp/data/python_star_2000repo/horovod/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' develop --no-deps
cwd: /mnt/zejun/smp/data/python_star_2000repo/horovod/
Complete output (97 lines):
running develop
running egg_info
creating horovod.egg-info
writing horovod.egg-info/PKG-INFO
writing dependency_links to horovod.egg-info/dependency_links.txt
writing entry points to horovod.egg-info/entry_points.txt
writing requirements to horovod.egg-info/requires.txt
writing top-level names to horovod.egg-info/top_level.txt
writing manifest file 'horovod.egg-info/SOURCES.txt'
reading manifest file 'horovod.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching '.hpp' under directory ''
no previously-included directories found matching '.eggs'
warning: no directories found matching 'third_party/eigen/Eigen'
warning: no previously-included files found matching 'third_party/eigen/Eigen/Eigen'
warning: no previously-included files found matching 'third_party/eigen/Eigen/IterativeLinearSolvers'
warning: no previously-included files found matching 'third_party/eigen/Eigen/MetisSupport'
warning: no previously-included files found matching 'third_party/eigen/Eigen/Sparse'
warning: no previously-included files found matching 'third_party/eigen/Eigen/SparseCholesky'
warning: no previously-included files found matching 'third_party/eigen/Eigen/SparseLU'
warning: no previously-included files found matching 'third_party/eigen/Eigen/src/IterativeSolvers/'
warning: no previously-included files found matching 'third_party/eigen/Eigen/src/OrderingMethods/Amd.h'
warning: no previously-included files found matching 'third_party/eigen/Eigen/src/SparseCholesky/'
warning: no previously-included files found matching 'third_party/eigen/unsupported/test/mpreal/mpreal.h'
warning: no previously-included files found matching 'third_party/eigen/unsupported/Eigen/FFT'
warning: no previously-included files found matching 'third_party/eigen/unsupported/Eigen/MPRealSupport'
warning: no previously-included files found matching 'third_party/eigen/doc/PreprocessorDirectives.dox'
warning: no previously-included files found matching 'third_party/eigen/doc/UsingIntelMKL.dox'
warning: no previously-included files found matching 'third_party/eigen/doc/SparseLinearSystems.dox'
warning: no previously-included files found matching 'third_party/eigen/COPYING.GPL'
warning: no previously-included files found matching 'third_party/eigen/COPYING.LGPL'
warning: no previously-included files found matching 'third_party/eigen/COPYING.README'
warning: no directories found matching 'third_party/gloo/cmake'
warning: no files found matching 'CMakeLists.txt' under directory 'third_party/gloo'
warning: no files found matching '*.in' under directory 'third_party/gloo'
writing manifest file 'horovod.egg-info/SOURCES.txt'
running build_ext
-- Could not find CCache. Consider installing CCache to speed up compilation.
-- The CXX compiler identification is GNU 7.5.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Build architecture flags: -mf16c -mavx -mfma
-- Using command /mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7
-- Could NOT find MPI_CXX (missing: MPI_CXX_LIB_NAMES MPI_CXX_HEADER_DIR MPI_CXX_WORKS)
-- Could NOT find MPI (missing: MPI_CXX_FOUND)
-- Could NOT find NVTX (missing: NVTX_INCLUDE_DIR)
CMake Error at CMakeLists.txt:265 (add_subdirectory):
The source directory

    /mnt/zejun/smp/data/python_star_2000repo/horovod/third_party/gloo

  does not contain a CMakeLists.txt file.


CMake Error at CMakeLists.txt:267 (target_compile_definitions):
  Cannot specify compile definitions for target "gloo" which is not built by
  this project.


-- Could NOT find Tensorflow (missing: Tensorflow_LIBRARIES) (Required is at least version "1.15.0")
-- Could NOT find Pytorch: Found unsuitable version "", but required is at least "1.2.0" (found )
-- Could NOT find Mxnet (missing: Mxnet_LIBRARIES) (Required is at least version "1.4.0")
-- Configuring incomplete, errors occurred!
See also "/mnt/zejun/smp/data/python_star_2000repo/horovod/build/temp.linux-x86_64-3.7/RelWithDebInfo/CMakeFiles/CMakeOutput.log".
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/mnt/zejun/smp/data/python_star_2000repo/horovod/setup.py", line 213, in <module>
    'horovodrun = horovod.runner.launch:run_commandline'
  File "/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/lib/python3.7/site-packages/setuptools/__init__.py", line 144, in setup
    return distutils.core.setup(**attrs)
  File "/usr/lib/python3.7/distutils/core.py", line 148, in setup
    dist.run_commands()
  File "/usr/lib/python3.7/distutils/dist.py", line 966, in run_commands
    self.run_command(cmd)
  File "/usr/lib/python3.7/distutils/dist.py", line 985, in run_command
    cmd_obj.run()
  File "/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/lib/python3.7/site-packages/setuptools/command/develop.py", line 38, in run
    self.install_for_development()
  File "/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/lib/python3.7/site-packages/setuptools/command/develop.py", line 140, in install_for_development
    self.run_command('build_ext')
  File "/usr/lib/python3.7/distutils/cmd.py", line 313, in run_command
    self.distribution.run_command(command)
  File "/usr/lib/python3.7/distutils/dist.py", line 985, in run_command
    cmd_obj.run()
  File "/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/lib/python3.7/site-packages/setuptools/command/build_ext.py", line 87, in run
    _build_ext.run(self)
  File "/usr/lib/python3.7/distutils/command/build_ext.py", line 340, in run
    self.build_extensions()
  File "/mnt/zejun/smp/data/python_star_2000repo/horovod/setup.py", line 101, in build_extensions
    cwd=cmake_build_dir)
  File "/usr/lib/python3.7/subprocess.py", line 363, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['cmake', '/mnt/zejun/smp/data/python_star_2000repo/horovod', '-DCMAKE_BUILD_TYPE=RelWithDebInfo', '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_RELWITHDEBINFO=/mnt/zejun/smp/data/python_star_2000repo/horovod/build/lib.linux-x86_64-3.7', '-DPYTHON_EXECUTABLE:FILEPATH=/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7']' returned non-zero exit status 1.
----------------------------------------

ERROR: Command errored out with exit status 1: /mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/mnt/zejun/smp/data/python_star_2000repo/horovod/setup.py'"'"'; file='"'"'/mnt/zejun/smp/data/python_star_2000repo/horovod/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' develop --no-deps Check the logs for full command output.
WARNING: You are using pip version 20.1.1; however, version 21.3.1 is available.
You should consider upgrading via the '/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7 -m pip install --upgrade pip' command.
Collecting pytest
Using cached pytest-6.2.5-py3-none-any.whl (280 kB)
Collecting pytest-mock
Using cached pytest_mock-3.6.1-py3-none-any.whl (12 kB)
Collecting pytest-cov
Using cached pytest_cov-3.0.0-py3-none-any.whl (20 kB)
Collecting pluggy<2.0,>=0.12
Using cached pluggy-1.0.0-py2.py3-none-any.whl (13 kB)
Collecting iniconfig
Using cached iniconfig-1.1.1-py2.py3-none-any.whl (5.0 kB)
Collecting importlib-metadata>=0.12; python_version < "3.8"
Using cached importlib_metadata-4.10.0-py3-none-any.whl (17 kB)
Collecting toml
Using cached toml-0.10.2-py2.py3-none-any.whl (16 kB)
Collecting packaging
Using cached packaging-21.3-py3-none-any.whl (40 kB)
Collecting attrs>=19.2.0
Using cached attrs-21.2.0-py2.py3-none-any.whl (53 kB)
Collecting py>=1.8.2
Using cached py-1.11.0-py2.py3-none-any.whl (98 kB)
Collecting coverage[toml]>=5.2.1
Using cached coverage-6.2-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl (213 kB)
Collecting typing-extensions>=3.6.4; python_version < "3.8"
Using cached typing_extensions-4.0.1-py3-none-any.whl (22 kB)
Collecting zipp>=0.5
Using cached zipp-3.6.0-py3-none-any.whl (5.3 kB)
Collecting pyparsing!=3.0.5,>=2.0.2
Using cached pyparsing-3.0.6-py3-none-any.whl (97 kB)
Collecting tomli; extra == "toml"
Using cached tomli-2.0.0-py3-none-any.whl (12 kB)
Installing collected packages: typing-extensions, zipp, importlib-metadata, pluggy, iniconfig, toml, pyparsing, packaging, attrs, py, pytest, pytest-mock, tomli, coverage, pytest-cov
Successfully installed attrs-21.2.0 coverage-6.2 importlib-metadata-4.10.0 iniconfig-1.1.1 packaging-21.3 pluggy-1.0.0 py-1.11.0 pyparsing-3.0.6 pytest-6.2.5 pytest-cov-3.0.0 pytest-mock-3.6.1 toml-0.10.2 tomli-2.0.0 typing-extensions-4.0.1 zipp-3.6.0
WARNING: You are using pip version 20.1.1; however, version 21.3.1 is available.
You should consider upgrading via the '/mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7 -m pip install --upgrade pip' command.
install
test
============================= test session starts ==============================
platform linux -- Python 3.7.12, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 -- /mnt/zejun/smp/data/python_star_2000repo/horovod/venv_test_7/bin/python3.7
cachedir: .pytest_cache
rootdir: /mnt/zejun/smp/data/python_star_2000repo/horovod, configfile: setup.cfg
plugins: cov-3.0.0, mock-3.6.1
collecting ... collected 0 items / 1 error

==================================== ERRORS ====================================
___________________ ERROR collecting test/single/test_run.py ___________________
ImportError while importing test module '/mnt/zejun/smp/data/python_star_2000repo/horovod/test/single/test_run.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/lib/python3.7/importlib/init.py:127: in import_module
return _bootstrap._gcd_import(name[level:], package, level)
test/single/test_run.py:29: in
import mock
E ModuleNotFoundError: No module named 'mock'
=========================== short test summary info ============================
ERROR test/single/test_run.py
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!