How to make g++ search for header files in a specific directory?

Question

I have a project (a library) that is subdivided into a few directories with code in them. I\'d like to to have g++ search for header files in the project\'s root directory,

Answer 1

Headers included with #include <> will be searched in all default directories , but you can also add your own location in the search path with -I command line arg.

I saw your edit you could install your headers in default locations usually

 /usr/local/include
 libdir/gcc/target/version/include
 /usr/target/include
 /usr/include

Confirm with compiler docs though.