linux-kernel - Re: [Regression] Build failure in current mainline

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Date:	Sat, 3 Jan 2009 21:54:37 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Regression] Build failure in current mainline - firmware related

On Sat, Jan 03, 2009 at 09:49:48PM +0100, Sam Ravnborg wrote:
> On Sat, Jan 03, 2009 at 12:47:14PM +0100, Rafael J. Wysocki wrote:
> > Hi,
> > 
> > I get the following error from 'make modules_install' on my test boxes:
> > 
> >   HOSTCC  firmware/ihex2fw                                                             
> > /home/rafael/src/linux-2.6/firmware/ihex2fw.c:268: fatal error: opening dependency file firmware/.ihex2fw.d: Read-only file system                                            
> > compilation terminated.                                                                
> > make[3]: *** [firmware/ihex2fw] Error 1                                                
> > make[2]: *** [_modinst_post] Error 2                                                   
> > make[1]: *** [sub-make] Error 2                                                        
> > make: *** [all] Error 2
> > 
> > where the configuration is that the kernel is compiled on a build box
> > with 'make O=<destdir> -j5' and then <destdir> is mounted over NFS read-only by
> > each test box (full path to this directory is the same on the build box and on
> > the test boxes).  Then, I cd into <destdir>, run 'make modules_install' and get
> > the error above.
> > 
> > 2.6.28 didn't have this problem.
> 
> 
> Strange...
> 1) The string "opening dependency file" does not occur in my freshly pulled kernel
> 2) Line 268 is last line of ihex2fw.c
> 
> Could you try to do a "make modules_install V=1" to see the exact arguments supplied ti ihex2fw.c
> 
> I gave up on all the firmware stuff long time ago and has
> never properly reviewed the implementation so I really
> have no clue what is actually happening.
> 
> Walking through the 179 lines Makefile has not yet benn on my
> "fun to do" list - and it most likely take a while before it hits it.

Took a quick peek. The Makefile uses "order only" in three spots.
This alone demand make version 3.80 IIRC and Documetnation/Changes
says 3.79.1...

The "order only" is so rare that Paul Smith once said that
coming up with a good example of usage was not easy.

For the headers_* stuff I recall when I reworked it I could
kill the usage of "order only" there but now it crept
back - sigh!

	Sam
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