How to tell where a header file is included from?
c, c++, g++, gcc, include
Solution
This will give make dependencies which list absolute paths of include files:
gcc -M showtime.c
If you don't want the system includes (i.e. `#include <something.h>`) then use:
gcc -MM showtime.c
Problem
How can I tell where g++ was able to find an include file? Basically if I ``` #include <foo.h> ``` g++ will scan the search path, using any include options to add or alter the path. But, at the end of days, is there a way I can tell the absolute path of foo.h that g++ chose to compile? Especially relevant if there is more than one foo.h in the myriad of search paths. Short of a way of accomplishing that... is there a way to get g++ to tell me what its final search path is after including defaults and all include options?