Commands to figure where gcc is looking for system headers:
For C++: `gcc -print-prog-name=cc1plus` -v
For C: `gcc -print-prog-name=cc1` -v
Commands to figure where gcc is looking for system headers:
For C++: `gcc -print-prog-name=cc1plus` -v
For C: `gcc -print-prog-name=cc1` -v