[FFmpeg-devel] Compiling with Sun cc

[Diego Biurrun]

On Sun, Oct 12, 2008 at 01:52:54PM -0200, Ramiro Polla wrote:
> On Sun, Oct 12, 2008 at 1:25 PM, Diego Biurrun <diego at biurrun.de> wrote:
> > On Sun, Oct 12, 2008 at 12:40:59PM +0100, M?ns Rullg?rd wrote:
> >> Diego Biurrun <diego at biurrun.de> writes:
> >>
> >> > On Sat, Oct 11, 2008 at 07:42:12PM -0700, Roman V. Shaposhnik wrote:
> >> >>
> >> >> On Mon, 2008-10-06 at 07:25 +0200, Diego Biurrun wrote:
> >> >> > On Sun, Oct 05, 2008 at 09:47:10PM -0700, Roman V. Shaposhnik wrote:
> >> >> > > On Fri, 2008-10-03 at 20:18 +0200, Diego Biurrun wrote:
> >> >> > > >
> >> >> > > > Roman, a feature request for you: Please provide us with a
> >> >> > > > suncc option that does not cut off the file path when
> >> >> > > > outputting dependency information for inclusion in Makefiles.
> >> >> > > > It's clear you will have to provide an
> >> >> > > > ass-backwards-compatibility mode, but you can surely improve
> >> >> > > > upon that...
> >> >> > >
> >> >> > > I guess I have to know more. If all you need is a FQPN, than cd'ing to /
> >> >> > > would do the trick. IOW:
> >> >> > >    (cd / ; gcc ...  -MM -MG ~/src/ffmpeg/libavcodec/dv.c)
> >> >> > > results in:
> >> >> > > dv.o: /home/roman/src/ffmpeg/libavcodec/dv.c \
> >> >> > >       /home/roman/src/ffmpeg/libavcodec/avcodec.h \
> >> >> > >       /home/roman/src/ffmpeg/libavutil/avutil.h \
> >> >> > >
> >> >> > > Am I missing something?
> >> >> >
> >> >> > Yes.  The above is what gcc emits and it is only useful if you use
> >> >> > braindamaged recursive make.  What we need is the full relative path,
> >> >> > of the object file, i.e.
> >> >> >
> >> >> > libavcodec/dv.o: libavcodec/dv.c libavcodec/avcodec.h libavutil/avutil.h
> >> >> >
> >> >> > instead of
> >> >> >
> >> >> > dv.o: libavcodec/dv.c libavcodec/avcodec.h libavutil/avutil.h
> >> >> >
> >> >> > Does that clarify things?
> >> >>
> >> >> It sure does and it makes sense. As long as you don't ask for
> >> >> full path names, but instead require full *relative* path names
> >> >> (IOW: a string that, if given to open(2), will open the same
> >> >> file that compiler did in the first place when it was run from
> >> >> the same CWD) it makes a very logical request. I'll see what I
> >> >> can do on our end.
> >> >
> >> > Great, this has been Mans' and mine pet peeve when dealing with
> >> > dependency generation for FFmpeg/MPlayer.
> 
> Is this something that cannot be achieved with -MT?

Ummm, so I came up with all this sed trickery completely in vain?
Brilliant idea, so simple, so obvious, thanks a bundle...

> >> Sadly, getting suncc fixed still leaves gcc in a mess, and we have to
> >> support that.
> >
> > There is always hope that gcc might eventually mimic the features of the
> > competition.
> 
> What about suggesting this to them, or - better yet - sending a patch?

Probably a good idea, but the gcc team has a spotty history when it
comes to reacting to bug reports, etc...

Diego