Clang with CLion: Cannot get compiler information [closed]

Question

I tried to switch from gcc to clang in CLion by changing the Toolchains preference:

But now the cmake fails with the following:

Cannot get compiler information:
Compiler exited with error code 1: /usr/bin/clang++ -xc++ -DENABLE_EXTRAS ...
clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0

If I manually run CMake in a terminal using -DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++ then it will work, only in CLion it doesn't.

Answer 1

Using clang 6.0 solves the problem:

-DCMAKE_C_COMPILER=/usr/bin/clang-6.0
-DCMAKE_CXX_COMPILER=/usr/bin/clang++-6.0

in CMake Options and go to File -> Invalidate Caches / Restart. Everything works normal.