Hello,
I observed some weird results about the dependency generation.
Suppose the source code structure is as follows:
root
|-- c
| |-- c.cpp
| |-- c.h
'c.cpp' includes the header file 'c.h' by
#include "c/c.h"
Now I try to generate the dependencies for c/c.cpp.
(A) If I'm now in 'root' folder and run command
g++ -MM -MT c/c.o c/c.cpp
the compiler outputs
c/c.o : c/c.cpp # which is wrong because it lacks c/c.h
(B) If I'm in folder 'c' and run command
g++ -MM -MT c.o c.cpp
the compiler can ouput the correct results
c.o : c.cpp c.h
(C) If I'm in the parent folder of folder 'root' and run command
g++ -I./root -MM -MT root/c/c.o root/c/c.cpp
the results is also correct:
root/c/c,o : root/c/c.cpp root/c/c.h
(D) Now, if I'm in folder 'root' again and include the head file 'c.h'
for 'c.cpp' by
#include "c.h" instead of #include "c/c.h"
the result is also correct.
I'm wondering why (A) cannot give a correct dependency output but (B),
(C) and (D) can.
Thanks,
