[darwinbuild] "darwinbuild xnu" fails: /dev/null: No such file or directory

[Dustin Lang]

Hi,

I'll provide an answer to my own question.

It appears that the "as" command invoked by the build script was deleting 
/dev/null.  Cheeky monkey!  I fixed it by changing the following line in 
darwinbuild (around line 620):
         echo "    cctools version: \$(as -v -o /dev/null < /dev/null 2>&1 
| cut -c 22- 2>/dev/null)"

to:

 	echo "    cctools version: \$(as -v -o /ignore-me < /dev/null 2>&1 
| cut -c 22- 2>/dev/null)"

I found this problem by adding an "ls -l /dev/null" after that line and 
finding that /dev/null no longer existed.

After this change, xnu is (so far) happily building...

By the way, this was on a MacOS 10.3.9 system:
> sw_vers
ProductName:    Mac OS X
ProductVersion: 10.3.9
BuildVersion:   7W98

Cheers,
dstn.

>
> Hi,
>
> I spent yesterday trying to get various darwin components build, using what I 
> thought was darwinbuild 0.7.2.  It turned out that I had in fact installed an 
> older version to /usr/local/darwinbuild and modified my path to point to that 
> one, while the new one was installed in /usr/local. Argh - that sort of thing 
> makes me feel pretty dumb.  If darwinbuild had a "-version" option I might 
> have caught my mistake sooner - feature request?
>
> Anyway, I've now straightened myself out but am rather quickly hitting a 
> wall.  I run "darwinbuild -init 7W98", then "darwinbuild xnu", which produces 
> the log file attached.
>
> I tried doing "mount -t devfs devfs BuildRoot/dev/" before running 
> darwinbuild, with almost the same effect (it reports "devfs appears to 
> exist").
>
> I added a couple of lines to darwinbuild to do an "ls -l /dev/null" at the 
> start of the build script, with this result:
>
> Checking /dev/null:
> crw-rw-rw-  1 root  wheel    3,   2  9 Jan 09:22 /dev/null
>
> so it looks to me like /dev/null exists in the chrooted environment.
>
> What's going on?  Any suggestions of what I should do?
>
> Thanks,
> dustin.
>