Re: icc dependency generation

[Ralf Wildenhues]

* Akim Demaille wrote on Thu, Jun 26, 2003 at 02:47:24PM CEST:
>  > On Thu, Jun 26, 2003 at 11:23:04AM +0200, Ralf Wildenhues wrote:
>  >> Intel compiler icc version 7.1 handles the -MF option inconsistently.
>  > [...]
>  >> Subsequently, the depcomp 'icc' mode will not be detected correctly
>  >> during the ./configure run, since it uses '-MD -MF'.
> 
>  > This sucks.  If -MF cannot work with -MD, depcomp will have to call icc
>  > twice: one time to get dependency information, and another time to do
>  > the actual compilation.  This will be slower.

ACK.

>  > Or we could use -MD alone, but as ICC does respect subdirectories (at
>  > least with ICC 7.0, compiling foo/bar.c with -MD would create ./bar.d
>  > instead of foo/bar.d -- could you check this with 7.1?) we'd need to
>  > implement some locking scheme in depcomp so that compiling foo/bar.c
>  > and baz/bar.c in parallel do not write the same bar.d.

Just so I don't misunderstand you:
| $ ls -R
| .:
| foo
|  
| ./foo:
| bar.c  bar.h
| $ icc -MD -c foo/bar.c ; ls -R
| .:
| bar.d  bar.o  foo
|  
| ./foo:
| bar.c  bar.h
| $ more bar.d
| bar.o: foo/bar.c /usr/include/assert.h /usr/include/features.h \
| [...]
|  foo/bar.h

Similar behaviour with -MMD.

>  >> Any suggestions?
>  > Complain to Intel, if not already done.

Will do so and report back for news.  Could take some time, though.

> Err, maybe my message went unnoticed, but you might find additional
> information here too.

All but the last of your messages (which I read after sending mine)
looked to me like they are different issues.

Regards,
Ralf