Sometimes, I find .d
files for a given source file.
For instance, if I compile test.c
, I've got
test.d, test.o
I understand that test.o
is the object file but have no idea what is test.d
for.
Could you give any hints or pointers?
Many build systems add automatically detected make
dependencies into the .d
file. In particular, for C/C++ source files they determine what #include
files are required and automatically generate that information into the .d
file.
The .d
files are then included by the makefile
so make
is aware of that information. If you look at the contents of those files they'll be make prerequisite statements, like:
foo.o : foo.h bar.h biz.h
etc.