Mac 中CMake编译错误无法正确读取系统信息

在准备一个验证0..1000中有多少个”7”时，就随手下了个CLion。之前一直是在实验室的电脑用CLion写C++来着，用着很舒服。对CLion进行配置之后进行编译时出现以下错误：

> /Applications/CMake.app/Contents/bin/cmake -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - Unix Makefiles" /Users/changeset/CLionProjects/untitled
> -- The C compiler identification is AppleClang 8.1.0.8020038
> -- The CXX compiler identification is AppleClang 8.1.0.8020038 CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeSystemSpecificInformation.cmake:26
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> CMakeLists.txt:2 (PROJECT)
> 
> 
> System is unknown to cmake, create: Platform/sysname:Darwin 
> nodename:Fez.local  release:16.5.0  version:Darwin Kernel Version
> 16.5.0: Fri Mar  3 16:52:33 PST 2017; root:xnu-3789.51.2~3/RELEASE_X86_64  machine:x86_64 to use this
> system, please send your config file to [email protected] so it can
> be added to cmake Your CMakeCache.txt file was copied to
> CopyOfCMakeCache.txt. Please send that file to [email protected].
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:38
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> CMakeLists.txt:2 (PROJECT)
> 
> 
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:41
> (include):   include called with invalid argument:
> root:xnu-3789.51.2~3_RELEASE_X86_64
> 
>    machine:x86_64 Call Stack (most recent call first):  
> CMakeLists.txt:2 (PROJECT)
> 
> 
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:48
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> CMakeLists.txt:2 (PROJECT)
> 
> 
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:52
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> CMakeLists.txt:2 (PROJECT)
> 
> 
> -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeSystemSpecificInformation.cmake:26
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> /Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeTmp/CMakeLists.txt:2
> (project)
> 
> 
> System is unknown to cmake, create: Platform/sysname:Darwin 
> nodename:Fez.local  release:16.5.0  version:Darwin Kernel Version
> 16.5.0: Fri Mar  3 16:52:33 PST 2017; root:xnu-3789.51.2~3/RELEASE_X86_64  machine:x86_64 to use this
> system, please send your config file to [email protected] so it can
> be added to cmake CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:38
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> /Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeTmp/CMakeLists.txt:2
> (project)
> 
> 
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:41
> (include):   include called with invalid argument:
> root:xnu-3789.51.2~3_RELEASE_X86_64
> 
>    machine:x86_64 Call Stack (most recent call first):  
> /Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeTmp/CMakeLists.txt:2
> (project)
> 
> 
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:48
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> /Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeTmp/CMakeLists.txt:2
> (project)
> 
> 
> CMake Error at
> /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeCInformation.cmake:52
> (include):   include called with wrong number of arguments.  include()
> only takes one   file. Call Stack (most recent call first):  
> /Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeTmp/CMakeLists.txt:2
> (project)
> 
> 
> CMake Error: Internal CMake error, TryCompile configure of cmake
> failed
> -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
> -- broken CMake Error at /Applications/CMake.app/Contents/share/cmake-3.7/Modules/CMakeTestCCompiler.cmake:51
> (message):   The C compiler  
> "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc"
> is not able to compile a simple test program.
> 
>   It fails with the following output:
> 
>    
> 
>   
> 
>   CMake will not be able to correctly generate this project. Call
> Stack (most recent call first):   CMakeLists.txt:2 (PROJECT)
> 
> 
> -- Configuring incomplete, errors occurred! See also "/Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeOutput.log".
> See also
> "/Users/changeset/CLionProjects/untitled/cmake-build-debug/CMakeFiles/CMakeError.log".

熬夜到3点都没查出来CMake是怎么读取系统文件的。

Finally, I solved my problems here. It seems to be unusual.

The errors listed about CMake were caused by incorrectly invokinguname.

I checked out the CMake manual, and I found that my mac produced the wrong CMAKE_HOST_SYSTEM_NAME results. And after test uname on my terminal, I found that maybe the kernel used wrong command. And then I echo $PATH found that my $PATH changed by cocos2d-x installed yesterday. The new $PATH include my uname programmed for study, and it overrided the kernel uname. After I delete my uname, clean CMake, restart CLion, everything is just going fine. Done.

这个uname是去年做毕设时余留的产物，所以覆盖了kernel中的uname。

最后附上那个0..1000中有多少个”7”的验证程序。其实更简单的算法是把1-999中的个位、十位、百位中7做组合也就是每一位为7的数有10 * 10 = 100个，总共就是100 * 3 = 300个。

#include <iostream>
using namespace::std;
int main() {
    int m, n;
    int temp, count = 0;
    cin >> m >> n;
    for (int i = m; i < n; i++){
        temp = i;
        while (temp) {
            if ((temp % 10) == 7){
                count ++;
            }
            temp /= 10;
        }
    }
    cout << "numbers of 7: " << count << endl;
    return 0;
}

你能从这里找到我：

我的微博

我的知乎

我也很忙，就先这样。