How To Get g++ to list paths to all #included files
c, c++, g++, gcc, include-path
Solution
You need to invoke g++ with the `-M` option.
From the manual:
Instead of outputting the result of preprocessing, output a rule suitable for make describing the dependencies of the main source file. The preprocessor outputs one make rule containing the object file name for that source file, a colon, and the names of all the included files, including those coming from -include or -imacros command line options.
It's worth reading the manual to consider the other `-M` sub options (`-MM` and `-MF` in particular may be of use).
Problem
I would like to have g++/gcc tell me the paths to everything non-system it is #include-ing in C++ build. Turns out, that is a tough search as Google mus-interprets it about ten different ways. I want these filenames and paths so I can add them to the search path for Exuberant CTAGS. We have a huge project and if I use ctags on the whole thing it takes about half an hour to generate the tags file and nearly as long for the editor to do a look-up. We use CMakeLisats to do the compiling. If there is a directive I can paste into the CMakeLists.txt, that would be extra wonderfulness. I don't really need the default paths and filenames, Johnathan Wakely gave a good tool for that here. I think that pretty much covers the fact that this is a cross compile job. I don't need the cross-system files either.