After I install the oneAPI, it looks like there are two folders that contain the tbb.h file. The one is 'TBBROOT/VERSION/oneapi/' and another one is 'TBBROOT/VERSION/tbb/'. What's the difference between them?
Are they link to same lib files?
I also found the two version of tbb.h in $VERSION/include/oneapi and $VERSION/include/tbb
Looking at the 2nd location you find inside the tbb.h file (only non comment line):
It looks as if this tbb.h file is just for backward compatibility and it points to the new oneapi location. Other include files in this location also point to their oneapi version.