[英]CMake on Windows
I am trying to run CMake on Windows, and I get the following error:我正在尝试在 Windows 上运行 CMake,但出现以下错误:
-- The C compiler identification is unknown
CMake Error at CMakeLists.txt:3 (PROJECT):
The CMAKE_C_COMPILER:
cl
is not a full path and was not found in the PATH.
To use the NMake generator with Visual C++, cmake must be run from a shell
that can use the compiler cl from the command line. This environment is
unable to invoke the cl compiler. To fix this problem, run cmake from the
Visual Studio Command Prompt (vcvarsall.bat).
Tell CMake where to find the compiler by setting either the environment
variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
the compiler, or to the compiler name if it is in the PATH.
However my "CC" environment variable is set!但是我的“CC”环境变量已设置!
>>echo %CC%
C:\Anaconda2\MinGW\x86_64-w64-mingw32\bin\gcc.exe
Because CMake's error message is misleading here, I think it warrants a little more detailed answer.因为 CMake 的错误消息在这里具有误导性,我认为它需要更详细的答案。
In short, you ran into a chicken-and-egg kind of a problem.简而言之,您遇到了鸡与蛋的问题。
CMake's compiler detection is mighty, but since - during the first try - CMake 的编译器检测功能强大,但由于 - 在第一次尝试期间 -
-G
-G
一起使用的显式生成器PATH
environmentPATH
环境中找不到任何 C/C++ 编译器CC
environment variable defined with the full path to a compilerCC
环境变量It was defaulting to nmake
.它默认为
nmake
。
Now here comes the problem: it does remember your implicit generator/compiler choice in it's variable cache (see CMAKE_GENERATOR
in CMakeCache.txt
).现在问题来了:它确实记住了您在变量缓存中的隐式生成器/编译器选择(请参阅
CMAKE_GENERATOR
中的CMakeCache.txt
)。 What is a very useful feature, if you have multiple compilers installed.如果您安装了多个编译器,这是一个非常有用的功能。
But if you then declare the CC
environment variable - as the error message suggests - it's too late since your generator's choice was remembered in the first try.但是,如果您随后声明
CC
环境变量 - 正如错误消息所暗示的那样 - 为时已晚,因为在第一次尝试时记住了您的生成器的选择。
I see two possible ways out of this:我看到了两种可能的方法:
cmake.exe -G "MinGW Makefiles" ..
(as the answer linked by @Guillaume suggests)cmake.exe -G "MinGW Makefiles" ..
(如@Guillaume 链接的答案所建议的) 给出正确的选项来cmake.exe -G "MinGW Makefiles" ..
生成器的选择CMakeCache.txt
) and do cmake.exe ..
after you added your compiler's bin
folder to your PATH
environment.CMakeCache.txt
)并在将编译器的bin
文件夹添加到PATH
环境后执行cmake.exe ..
。 References参考
I use cmake -G "MinGW Makefiles" .
我使用
cmake -G "MinGW Makefiles" .
instead of cmake .
而不是
cmake .
It worked!有效!
I came across the same problem and what worked for me was:我遇到了同样的问题,对我有用的是:
pip install dlib
part and the rest.pip install dlib
部分和其余部分。C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.29.30037\\bin\\Hostx64\\x64
. The method of adding paths to the environment variable can also be found in the above tutorial.)C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\BuildTools\\VC\\Tools\\MSVC\\14.29.30037\\bin\\Hostx64\\x64
添加了这个路径。添加环境变量路径的方法也可以在上面的教程中找到。) How was your cmake installed? 你的cmake是如何安装的? If you installed it using cygwin, now try the latest windows version from cmake official site and set the PATH variable to make sure the right cmake version is used.
如果您使用cygwin安装它,现在尝试cmake官方站点的最新Windows版本并设置PATH变量以确保使用正确的cmake版本。 It worked for me, hope it help you too.
它对我有用,希望它对你也有帮助。
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