Eclipse C++ multiple projects common files

Question

In Eclipse/CDT, I wish to have several C++ projects (projA, projB, projC, etc.) that will all include some .c, .cpp and/or .h files from a common directory. Here is my existing file structure:

Workspace -> projA -> src
          -> common ->src : a.c a.h  b.cpp  c.cpp  d.c  etc.
          -> projB -> src
          -< projC -> src

When I attempt to add a source file in ../common/src to projA, the Add a Source File tool complains that the file must be in the project.

So, how do I include, say ../common/src/a.c into ../projA -> src?

Answer 1

Eclipse has an option called add new source folder and an option in that dialogue to link to existing directory. You can link the "common" folder as a source folder in all of the projects pointing to the same directory.

Right click on project -> New -> Folder -> Advanced -> Link to alternate location

Once folder has been added,

Right click on Folder -> Buld Path -> Use as source folder