how to build the cpp example?

[l1t1]

I did not install the ninja, so I run following command as readme file told,
it hanged at the step of corrosion

/par/vortex-develop/vortex-cxx# cmake -Bbuild
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Sccache not found
^C

/par/vortex-develop/vortex-cxx# ls build/_deps
corrosion-build  corrosion-src  corrosion-subbuild

thanks