Trouble building mkfs.jffs2

Trouble building mkfs.jffs2

[John Messenger]

Hi,

Building mkfs.jffs2 after copying the content of the mtd distribution into
my kernel build tree, I get:

cd util
make
...
compr_zlib.c:15:2: #error "The userspace support got too messy and was
removed.  Update your mkfs.jffs2".

Has this been fixed?  Any suggestions?

Related question: how do you build your initial JFFS2 images?  I am also
trying to loopback mount a JFFS2 for a PPC machine on an i386 Red Hat 7.3
after loading JFFS2 modules, but no luck so far.

Help greatfully received.
	-- John

--
John Messenger, R&D Software Manager, ADVA Optical Networking Ltd.
Tel: +44-(1904) 699309
Fax: +44-(1904) 699378
Email: JMessenger@advaoptical.com
www.advaoptical.com
"Mind like parachute - only works when open." -- Charlie Chan  

Re: Trouble building mkfs.jffs2

[David Woodhouse]

JMessenger@advaoptical.com said:
> cd util
> make 
> ...
> compr_zlib.c:15:2: #error "The userspace support got too messy and was removed.  Update your mkfs.jffs2".

> Has this been fixed?  Any suggestions? 

rm compr_zlib. ; cvs up compr_zlib.c ; make

>  Related question: how do you build your initial JFFS2 images?  I am
> also trying to loopback mount a JFFS2 for a PPC machine on an i386 Red
> Hat 7.3 after loading JFFS2 modules, but no luck so far. 

mkfs.jffs2 will build a _populated_ image for you, containing all the files
in the directory you specify. It's more like mkisofs/mkcramfs than
mkfs.ext2, and should probably be renamed accordingly.

If you really want to mount the image on your PC, you need to be using the 
latest code which can handle byteswapping (see the #define in jffs2.h) and 
load an 'mtdram' module on the PC with size and erasesize matching your 
hardware. Then see http://www.handhelds.org/z/wiki/LoopBack

Don't forget the '-b' option to mkfs.jffs2.

--
dwmw2