Re: how gcc -I works?

[Darryl Miles <darryl-mailinglists at netbauds dot net>]

xu zhou wrote:
>   I want to include header files from /usr/src/linux/include because
> I want to compile a module. I use the gcc -I option. It include header
> files from the correct path but the header files alse include header
> files , and those header files are included from /usr/include which is
> my common include path.  I don't know how to fix it , can anyone help
> me ?


I dont think you are meant to use kernel header files directly so this 
is the rule you are breaking here.  But if you insist then the following 
may help you.


Try using:

gcc -v -Iyourdir blah... blah...

To see where files are being included from and in what order.


Check out the options:

-nostdinc -nostdinc++


Then maybe reintroduce header files in the specific order you want.



Alternatively maybe the simplest trick is to add a symlink:

/usr/src/linux/kinclude -> include


To add -I/usr/src/linux


Then use:

#include <kinclude/linux/foobar.h>
#include <kinclude/asm/foobar.h>


You shove the verbatim linux kernel header files down the include file 
hierarchy one level with a new unique subdirectory name "kinclude" which 
doesn't clash with anything else.


Darryl