Re: Detect unused header files?

[Sam Ravnborg <sam@ravnborg.org>]

On Thu, Jul 30, 2009 at 03:55:46AM -0700, Christopher Li wrote:
> Hi Sam,
> 
> I create a branch "unused-include-files" for some experiment patch.
> Some thing quick and dirty to find out what works and what doesn't.
> No where near submitting quality.
> 
> http://git.kernel.org/?p=devel/sparse/chrisl/sparse.git;a=shortlog;h=unused-include-files
> 
> Currently it just report all unused stream.
> 
> for your example foo.h:
> 
> #include <linux/types.h>
> #include <linux/string.h>
> 
> struct foo {
>        __u32 bar;
>        __u32 baz;
> };
> 
> 
> $ ./sparse foo.h
> unused stream preprocessor(1)
> unused stream foo.h(2)
> unused stream preprocessor(3)
> unused stream /usr/include/linux/stddef.h(6)
> unused stream /usr/include/asm/posix_types.h(7)
> unused stream /usr/include/asm/types.h(9)
> unused stream /usr/include/linux/string.h(11)
> unused stream /usr/include/string.h(12)
> unused stream /usr/include/features.h(13)
> unused stream /usr/include/sys/cdefs.h(14)
> unused stream /usr/include/bits/wordsize.h(15)
> unused stream /usr/include/gnu/stubs.h(16)
> unused stream /usr/include/bits/wordsize.h(17)
> unused stream /usr/include/gnu/stubs-32.h(18)
> unused stream /usr/lib/gcc/x86_64-redhat-linux/4.3.0//include/stddef.h(19)
> 
> Just as I expected. Lost of noise :-)
> 
> BTW, use "-vstream" to show the actual symbol usage detail.
> 
> Comments?
Thanks for hacking this up!

I will try it out during the weekend as work permits. Busy...

	Sam