> make clean
-## Change the compiler to Clang++
+## Change the compilers
- > cmake -DCMAKE_CXX_COMPILER=/usr/bin/clang++
+ > cmake -DCMAKE_CXX_COMPILER=/usr/bin/g++ -DCMAKE_C_COMPILER=/usr/bin/gcc
+ or
+ > cmake -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DCMAKE_C_COMPILER=/usr/bin/clang
## Some basic ubuntu requirements