Pip install dlib installation failed

https://github.com/matthewear. needs to install dlib, to run this, but the installation reported an error. 

Collecting dlib
  Using cached https://files.pythonhosted.org/packages/54/ff/5781a11bdc0d1c90a813f3f66d460abf628e5114856a842d18d43f709a7a/dlib-19.10.0.tar.gz
Building wheels for collected packages: dlib
  Running setup.py bdist_wheel for dlib ... error
  Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__="/tmp/pip-install-ZA44JR/dlib/setup.py";f=getattr(tokenize, "open", open)(__file__);code=f.read().replace("\r\n", "\n");f.close();exec(compile(code, __file__, "exec"))" bdist_wheel -d /tmp/pip-wheel-9SSCJL --python-tag cp27:
  running bdist_wheel
  running build
  running build_py
  package init file "dlib/__init__.py" not found (or not a regular file)
  running build_ext
  Invoking CMake setup: "cmake /tmp/pip-install-ZA44JR/dlib/tools/python -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=/tmp/pip-install-ZA44JR/dlib/build/lib.linux-i686-2.7 -DPYTHON_EXECUTABLE=/usr/bin/python -DCMAKE_BUILD_TYPE=Release"
  -- The C compiler identification is GNU 4.4.7
  -- The CXX compiler identification is GNU 4.4.7
  -- Check for working C compiler: /usr/bin/cc
  -- Check for working C compiler: /usr/bin/cc -- works
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working CXX compiler: /usr/bin/cPP
  -- Check for working CXX compiler: /usr/bin/cPP -- works
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  -- Found PythonInterp: /usr/bin/python (found version "2.7.14")
  -- Found PythonLibs: /usr/local/python27/lib/libpython2.7.so
  -- Performing Test HAS_CPP14_FLAG
  -- Performing Test HAS_CPP14_FLAG - Failed
  -- Performing Test HAS_CPP11_FLAG
  -- Performing Test HAS_CPP11_FLAG - Failed
  CMake Error at /tmp/pip-install-ZA44JR/dlib/dlib/external/pybind11/tools/pybind11Tools.cmake:32 (message):
    Unsupported compiler -- pybind11 requires CPP11 support!
  Call Stack (most recent call first):
    /tmp/pip-install-ZA44JR/dlib/dlib/external/pybind11/CMakeLists.txt:33 (include)
  
  
  -- Configuring incomplete, errors occurred!
  See also "/tmp/pip-install-ZA44JR/dlib/build/temp.linux-i686-2.7/CMakeFiles/CMakeOutput.log".
  See also "/tmp/pip-install-ZA44JR/dlib/build/temp.linux-i686-2.7/CMakeFiles/CMakeError.log".
  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "/tmp/pip-install-ZA44JR/dlib/setup.py", line 249, in <module>
      "Topic :: Software Development",
    File "/usr/local/python27/lib/python2.7/site-packages/setuptools/__init__.py", line 129, in setup
      return distutils.core.setup(**attrs)
    File "/usr/local/python27/lib/python2.7/distutils/core.py", line 151, in setup
      dist.run_commands()
    File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 953, in run_commands
      self.run_command(cmd)
    File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/usr/local/python27/lib/python2.7/site-packages/wheel/bdist_wheel.py", line 204, in run
      self.run_command("build")
    File "/usr/local/python27/lib/python2.7/distutils/cmd.py", line 326, in run_command
      self.distribution.run_command(command)
    File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/usr/local/python27/lib/python2.7/distutils/command/build.py", line 127, in run
      self.run_command(cmd_name)
    File "/usr/local/python27/lib/python2.7/distutils/cmd.py", line 326, in run_command
      self.distribution.run_command(command)
    File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/tmp/pip-install-ZA44JR/dlib/setup.py", line 129, in run
      self.build_extension(ext)
    File "/tmp/pip-install-ZA44JR/dlib/setup.py", line 163, in build_extension
      subprocess.check_call(cmake_setup, cwd=build_folder)
    File "/usr/local/python27/lib/python2.7/subprocess.py", line 186, in check_call
      raise CalledProcessError(retcode, cmd)
  subprocess.CalledProcessError: Command "["cmake", "/tmp/pip-install-ZA44JR/dlib/tools/python", "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=/tmp/pip-install-ZA44JR/dlib/build/lib.linux-i686-2.7", "-DPYTHON_EXECUTABLE=/usr/bin/python", "-DCMAKE_BUILD_TYPE=Release"]" returned non-zero exit status 1
  
  ----------------------------------------
  Failed building wheel for dlib
  Running setup.py clean for dlib
Failed to build dlib
Installing collected packages: dlib
  Running setup.py install for dlib ... error
    Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__="/tmp/pip-install-ZA44JR/dlib/setup.py";f=getattr(tokenize, "open", open)(__file__);code=f.read().replace("\r\n", "\n");f.close();exec(compile(code, __file__, "exec"))" install --record /tmp/pip-record-EBLzit/install-record.txt --single-version-externally-managed --compile:
    running install
    running build
    running build_py
    package init file "dlib/__init__.py" not found (or not a regular file)
    running build_ext
    Invoking CMake setup: "cmake /tmp/pip-install-ZA44JR/dlib/tools/python -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=/tmp/pip-install-ZA44JR/dlib/build/lib.linux-i686-2.7 -DPYTHON_EXECUTABLE=/usr/bin/python -DCMAKE_BUILD_TYPE=Release"
    -- The C compiler identification is GNU 4.4.7
    -- The CXX compiler identification is GNU 4.4.7
    -- Check for working C compiler: /usr/bin/cc
    -- Check for working C compiler: /usr/bin/cc -- works
    -- Detecting C compiler ABI info
    -- Detecting C compiler ABI info - done
    -- Check for working CXX compiler: /usr/bin/cPP
    -- Check for working CXX compiler: /usr/bin/cPP -- works
    -- Detecting CXX compiler ABI info
    -- Detecting CXX compiler ABI info - done
    -- Found PythonInterp: /usr/bin/python (found version "2.7.14")
    -- Found PythonLibs: /usr/local/python27/lib/libpython2.7.so
    -- Performing Test HAS_CPP14_FLAG
    -- Performing Test HAS_CPP14_FLAG - Failed
    -- Performing Test HAS_CPP11_FLAG
    -- Performing Test HAS_CPP11_FLAG - Failed
    CMake Error at /tmp/pip-install-ZA44JR/dlib/dlib/external/pybind11/tools/pybind11Tools.cmake:32 (message):
      Unsupported compiler -- pybind11 requires CPP11 support!
    Call Stack (most recent call first):
    -- Performing Test HAS_CPP14_FLAG
    -- Performing Test HAS_CPP14_FLAG - Failed
    -- Performing Test HAS_CPP11_FLAG
    -- Performing Test HAS_CPP11_FLAG - Failed
    CMake Error at /tmp/pip-install-ZA44JR/dlib/dlib/external/pybind11/tools/pybind11Tools.cmake:32 (message):
      Unsupported compiler -- pybind11 requires CPP11 support!
    Call Stack (most recent call first):
      /tmp/pip-install-ZA44JR/dlib/dlib/external/pybind11/CMakeLists.txt:33 (include)


    -- Configuring incomplete, errors occurred!
    See also "/tmp/pip-install-ZA44JR/dlib/build/temp.linux-i686-2.7/CMakeFiles/CMakeOutput.log".
    See also "/tmp/pip-install-ZA44JR/dlib/build/temp.linux-i686-2.7/CMakeFiles/CMakeError.log".
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-ZA44JR/dlib/setup.py", line 249, in <module>
        "Topic :: Software Development",
      File "/usr/local/python27/lib/python2.7/site-packages/setuptools/__init__.py", line 129, in setup
        return distutils.core.setup(**attrs)
      File "/usr/local/python27/lib/python2.7/distutils/core.py", line 151, in setup
        dist.run_commands()
      File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 953, in run_commands
        self.run_command(cmd)
      File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "/usr/local/python27/lib/python2.7/site-packages/setuptools/command/install.py", line 61, in run
        return orig.install.run(self)
      File "/usr/local/python27/lib/python2.7/distutils/command/install.py", line 563, in run
        self.run_command("build")
      File "/usr/local/python27/lib/python2.7/distutils/cmd.py", line 326, in run_command
        self.distribution.run_command(command)
      File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "/usr/local/python27/lib/python2.7/distutils/command/build.py", line 127, in run
        self.run_command(cmd_name)
      File "/usr/local/python27/lib/python2.7/distutils/cmd.py", line 326, in run_command
        self.distribution.run_command(command)
      File "/usr/local/python27/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "/tmp/pip-install-ZA44JR/dlib/setup.py", line 129, in run
        self.build_extension(ext)
      File "/tmp/pip-install-ZA44JR/dlib/setup.py", line 163, in build_extension
        subprocess.check_call(cmake_setup, cwd=build_folder)
      File "/usr/local/python27/lib/python2.7/subprocess.py", line 186, in check_call
        raise CalledProcessError(retcode, cmd)
    subprocess.CalledProcessError: Command "["cmake", "/tmp/pip-install-ZA44JR/dlib/tools/python", "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=/tmp/pip-install-ZA44JR/dlib/build/lib.linux-i686-2.7", "-DPYTHON_EXECUTABLE=/usr/bin/python", "-DCMAKE_BUILD_TYPE=Release"]" returned non-zero exit status 1

    ----------------------------------------
Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__="/tmp/pip-install-ZA44JR/dlib/setup.py";f=getattr(tokenize, "open", open)(__file__);code=f.read().replace("\r\n", "\n");f.close();exec(compile(code, __file__, "exec"))" install --record /tmp/pip-record-EBLzit/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-install-ZA44JR/dlib/
Python linux
Mar.04,2021

Unsupported compiler-- pybind11 requires CPP11 support!

upgrade your gcc

have you solved it? I have encountered the same problem

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