我想安装opencv。因此，我使用pip做到了。然后，我使用.zip文件从他们的官方网站安装了Cmake。
现在对于我正在处理的某些项目，我需要安装dlib。安装dlib时出现以下错误。
error while installing dlib package
我根本不理解该错误，因此我重新安装了Cmake，但使用了官方网站提供的Windows安装程序，并将其添加到所有用户的系统PATH中。
仍然我收到相同的错误。我注意到我正在使用缓存副本安装dlib，所以我使用了--no-cache-dir选项。还是一样的错误。
最后我将pip升级到了最新版本19.1.1
而且我得到了相同的错误，所有红色如下所示：
error while installing dlib using latest pip version
这是我尝试使用--no-cache-dir安装dlib时收到的信息
C:\Users\BB>pip install --no-cache-dir dlib
Collecting dlib
Downloading https://files.pythonhosted.org/packages/05/57/e8a8caa3c89a27f80bc78da39c423e2553f482a3705adc619176a3a24b36/dlib-19.17.0.tar.gz (3.4MB)
|████████████████████████████████| 3.4MB 384kB/s
Installing collected packages: dlib
Running setup.py install for dlib ... error
ERROR: Complete output from command 'c:\users\bb\appdata\local\programs\python\python37\python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\\Users\\BB\\AppData\\Local\\Temp\\pip-install-ku42qonb\\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 'C:\Users\BB\AppData\Local\Temp\pip-record-8iqzmg63\install-record.txt' --single-version-externally-managed --compile:
ERROR: running install
running build
running build_py
package init file 'dlib\__init__.py' not found (or not a regular file)
running build_ext
Building extension for Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 22:22:05) [MSC v.1916 64 bit (AMD64)]
Invoking CMake setup: 'cmake C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\tools\python -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\build\lib.win-amd64-3.7 -DPYTHON_EXECUTABLE=c:\users\bb\appdata\local\programs\python\python37\python.exe -DCMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE=C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\build\lib.win-amd64-3.7 -A x64'
-- Building for: NMake Makefiles
CMake Error in CMakeLists.txt:
Generator
NMake Makefiles
does not support platform specification, but platform
x64
was specified.
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
See also "C:/Users/BB/AppData/Local/Temp/pip-install-ku42qonb/dlib/build/temp.win-amd64-3.7/Release/CMakeFiles/CMakeOutput.log".
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\setup.py", line 261, in <module>
'Topic :: Software Development',
File "c:\users\bb\appdata\local\programs\python\python37\lib\site-packages\setuptools\__init__.py", line 145, in setup
return distutils.core.setup(**attrs)
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\core.py", line 148, in setup
dist.run_commands()
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\dist.py", line 966, in run_commands
self.run_command(cmd)
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\dist.py", line 985, in run_command
cmd_obj.run()
File "c:\users\bb\appdata\local\programs\python\python37\lib\site-packages\setuptools\command\install.py", line 61, in run
return orig.install.run(self)
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\command\install.py", line 545, in run
self.run_command('build')
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\dist.py", line 985, in run_command
cmd_obj.run()
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\command\build.py", line 135, in run
self.run_command(cmd_name)
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "c:\users\bb\appdata\local\programs\python\python37\lib\distutils\dist.py", line 985, in run_command
cmd_obj.run()
File "C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\setup.py", line 135, in run
self.build_extension(ext)
File "C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\setup.py", line 172, in build_extension
subprocess.check_call(cmake_setup, cwd=build_folder)
File "c:\users\bb\appdata\local\programs\python\python37\lib\subprocess.py", line 347, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['cmake', 'C:\\Users\\BB\\AppData\\Local\\Temp\\pip-install-ku42qonb\\dlib\\tools\\python', '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=C:\\Users\\BB\\AppData\\Local\\Temp\\pip-install-ku42qonb\\dlib\\build\\lib.win-amd64-3.7', '-DPYTHON_EXECUTABLE=c:\\users\\bb\\appdata\\local\\programs\\python\\python37\\python.exe', '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE=C:\\Users\\BB\\AppData\\Local\\Temp\\pip-install-ku42qonb\\dlib\\build\\lib.win-amd64-3.7', '-A', 'x64']' returned non-zero exit status 1.
----------------------------------------
ERROR: Command "'c:\users\bb\appdata\local\programs\python\python37\python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\\Users\\BB\\AppData\\Local\\Temp\\pip-install-ku42qonb\\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 'C:\Users\BB\AppData\Local\Temp\pip-record-8iqzmg63\install-record.txt' --single-version-externally-managed --compile" failed with error code 1 in C:\Users\BB\AppData\Local\Temp\pip-install-ku42qonb\dlib\