Cannot install in macOS 10.15.2

[Tekl]

This is the error message:

brew install projectm_musikcube                                                                                                                                    ✔  5s    19:27:58   
==> Installing projectm_musikcube from clangen/projectm_musikcube
==> Downloading https://github.com/clangen/projectM-musikcube/archive/0.5.2.tar.gz
Already downloaded: /Users/***/Library/Caches/Homebrew/downloads/2c7406293d11007b2303f07f90db3e343e31a70ae66efd35738e4282df78b6d2--projectM-musikcube-0.5.2.tar.gz
==> cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local/Cellar/projectm_musikcube/0.5.2 .
==> make
Last 15 lines from /Users/Wolfgang/Library/Logs/Homebrew/projectm_musikcube/02.make:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
/bin/sh: -std=c++11: command not found
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [src/libprojectM/CMakeFiles/projectM.dir/Preset.cpp.o] Error 127
/bin/sh: -std=c++11: command not found
make[2]: *** [src/libprojectM/CMakeFiles/projectM.dir/fftsg.cpp.o] Error 127
make[1]: *** [src/libprojectM/CMakeFiles/projectM.dir/all] Error 2
make: *** [all] Error 2