I also get this warning from lint for every file that includes stdlib.h:
c:\projects\nburn\O2/Packet.hpp 10 warning 451: header file 'stdlib.h'
repeatedly included but has no header guard
#include <stdlib.h>
I searched through the GCC include path and found 6 stdlib.h files. Everyone has a header guard except for one. I added a guard but it made no difference. I still get the warnings. Here are the first few lines of the file I modified: