Clion doesn't compile on MACOS Mojave 10.14

Could you please reload CMake project? We suppose that `Tools | CMake | Reset Cache` and reload project should help in this case.

@Trmasha2015, please do "xcode-select --install" in the terminal. What result do you get?

Please provide a screenshot of Preferences | Build, Execution, Deployment | Toolchains after doing "xcode-select --install".

@Trmasha2015, as you can see, CLion can't detect compilers from the command line tools. Have you performed "xcode-select --install" in the terminal? Have you tried reinstalling the command line tools?

Do you have /Library/Developer/CommandLineTools/usr/bin/c++ and /Library/Developer/CommandLineTools/usr/bin/cc?

As an experiment, please do the following:

1. Create a new default "C++ Executable" project in CLion.

2. Go to Preferences | Build, Execution, Deployment | Toolchains and specify /Library/Developer/CommandLineTools/usr/bin/cc and /Library/Developer/CommandLineTools/usr/bin/c++ as C and C++ compilers.

3. Do `Tools | CMake | Reset Cache and Reload Project`.

Does CLion build this project successfully after that?

I tried, but it didn't work. 

It finally works. Just remove the command line tools by 

sudo rm -rf /Library/Developer/CommandLineTools

I did all. But, I got a new problem.

Yes I tried. But, nothing changed

Yes I have.

Yes. Thank you very much=)

Hello, none of the regular cpp library like #include <cmath> is being included properly 

I've tried everything mentioned above. ran 'sudo -rf  /Library/Developer/CommandLineTools' and 'xcode-select --install'

,reload CMake project and changed my C and Cpp compilers as indicated. 

nevermind, I got it working by restarting clion again

Having the same issue after xcode removed from my system. and resting cmake cache works, thanks to Anna Filippova

Anna Filippova I'm raising this issue again. 

CLion 2020.1
Build #CL-201.6668.126, built on April 9, 2020
Runtime version: 11.0.6+8-b765.25 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.15.4
GC: ParNew, ConcurrentMarkSweep
Memory: 1987M
Cores: 8
Registry: run.processes.with.pty=TRUE

I re-installed the Xcode Toolchain and reset CMake cache but still nothing helps. What I consider suspicious is that in Toolchains I manually set path to C and C++ compilers as `/Library/Developer/CommandLineTools/usr/bin/cc` and `/Library/Developer/CommandLineTools/usr/bin/c++` appropriately, but in the error output I see like `/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_endian.h` making me guess that my manual setting is not important. Can you suggest something, please?

In general, I see errors like:

error: unknown type name '__builtin_constant_p'
short ntohs(const short word);