Re: [CFT]: ClangBSD is selfhosting, we need testers now

Ulrich Spörlein schrieb am 2010-04-22:
> On Wed, 21.04.2010 at 23:30:15 +0200, Alexander Best wrote:
> > Roman Divacky schrieb am 2010-04-21:
> > > On Wed, Apr 21, 2010 at 09:44:45PM +0200, Alexander Best wrote:
> > > > Roman Divacky schrieb am 2010-04-21:

> > > > [snip]

> > > > > 1) cd modules/sound/sound && make CC=gcc

> > > > after this step these are the sizes of sound.ko* in
> > > > modules/sound/sound:

> > > > -rw-r--r--  1 root  wheel   449120 Apr 21 21:36 sound.ko
> > > > -rw-r--r--  1 root  wheel  2284757 Apr 21 21:36 sound.ko.debug
> > > > -rw-r--r--  1 root  wheel  2055512 Apr 21 21:36
> > > > sound.ko.symbols

> > > > > 2) make -V SRCS | tr " " "\n" | grep -v \.h | sort | grep
> > > > >    "^[a-m].*"
> > > > >    | xargs touch

> > > this line is wrong.. it creates empty files which are used
> > > instead
> > > of touching the existing ones...  it needs to be adjusted so it
> > > touches the files (thus forcing them to be rebuilt with the
> > > second
> > > make invocation)

> > i'm now 100% sure that buffer.c is causing the problem. what i did
> > to verify
> > this was:

> > cd sys/modules/sound/sound && make CC=clang && touch
> > ../../../dev/sound/pcm/buffer.c && make CC=gcc && make install

> > this gives me working sound!

> Great stuff to have narrowed it down so much. Next logical step would
> be
> to do the bisect on function-level scope.

> Copy one half of buffer.c to buffer-clang.c, the other half to
> buffer-gcc.c,
> adjust the Makefile to use buffer-{gcc,clang}.c instead of buffer.c
> and
> compile them accordingly. Redo your tests till we know the single
> function(s)
> where clang produces bad code.

thanks for the hint. i'll try and see if i can pinpoint the exact function in
buffer.c causing the problem.

> Hang in there, the hard part is almost done!
> Uli

-- 
Alexander Best