How can I tell where g++ was able to find an include file? Basically if I
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?
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
g++ -H ...
will also print the full path of include files in a format which shows which header includes which
g++ -E -dI ... (whatever the original command arguments were)
If you use
-MM or one of the related options (
-M, etc), you get just the list of headers that are included without having all the other preprocessor output (which you seem to get with the suggested
g++ -E -dI solution).