Eclipse CDT "Symbol NULL could not be resolved"
NULL is usually defined in stddef.h. This file is also usually included with stdlib.h and stdio.h.
And, you could always do this:
#ifndef NULL#define NULL ((void *) 0)#endif
As Bob mentioned, i fix the bug just by rebuilt the index
- right your project
- choose "Index"
- choose "Rebuild"
I had the same problem: my makefile was running fine but I was getting errors like yours from the Eclipse CDT view.
I closed the current project, I opened a new "Makefile project with existing code" , specifying the right location source location of my project. After this, I checked that:right click project / C++ general / Paths and symbols / Gnu C++ / include directories is not empty and includes the correct paths of my project.
Then, I rebuilt the index (right click / index / rebuild).
Also, I use Eclipse CDT 7 and not Eclipse CDT 8 because CDT8 sometimes gives me compile errors from the GUI that I could not solve, eventhough the makefile was fine.