Re: [microblaze-uclinux] bridge-utils conversion to flat binary

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Paul,

Paul Hartke wrote:
> I am working on getting bridge-utils up and running in Microblaze uclinux
> but somehow the compilation isn't working properly:
>
> # brctl
> BINFMT_FLAT: bad magic/rev (0x1020100, need 0x4)
> BINFMT_FLAT: bad magic/rev (0x1020100, need 0x4)
>  ELF   : not found

It's an ELF binary, elf2flt hasn't run on it yet.

> I've used
> http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux/wiki/index.php/OutOfTreeCompile
> before but there is nothing specific in there about explicitly linking
> against the uClinux libraries and converting to a flat binary.

I've just tweaked that Wiki page to add the line 
PATH=$(PATH):${ROOTDIR)/tools

to the out of tree Makefile.  It's necessary to pick up the ucfront tool 
that is now part of the build process.

but, that's not the problem you are seeing...

> user/bridge-utils/brctl/Makefile has Microblaze options in the CFLAGS var so
> it knows about Microblaze uclinux.  I'm not sure where to look next...

The LDFLAGS build variable (with -W,elf2flt) isn't getting passed into 
the GNU autoconfigure Makefiles.  Try the attached patch.

Regards,

John

Index: user/bridge-utils/makefile
===================================================================
--- user/bridge-utils/makefile	(revision 282)
+++ user/bridge-utils/makefile	(working copy)
@@ -4,7 +4,7 @@
 	$(MAKE) -f Makefile
 
 Makefile:
-	./configure --host=$(CROSS_COMPILE:-=) $(CONFOPTS)
+	CC="$(CC) $(CFLAGS) $(LDFLAGS)" ./configure --host=$(CROSS_COMPILE:-=) $(CONFOPTS)
 
 clean:
 	$(MAKE) -f Makefile clean