[FFmpeg-devel] Compiling with Sun cc

[Ramiro Polla]

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?

>> 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?

Ramiro Polla