bunzip2 failure

[Rob Landley]

On Saturday 28 June 2008 13:18:22 Denys Vlasenko wrote:
> BTW, is Firmware Linux capable of producing a bootable system for blackfin?
> If not, do you want me to try fixing that?

It is not, and feel free to bang on it if you like.

I poked at blackfin a bit last year, but ran into two problems:

1) There's no blackfin emulator (certainly not in qemu),

2) gcc 4.1.2 didn't have all the blackfin patches merged at the time.  (They 
kept saying it was a todo item, and telling me to download a blackfin version 
of gcc.  Since half the point of the project is to build as many different 
architectures as possible from the same source and get them to work the same 
way, that would be a "no".)

They've probably fixed it in 4.3.  It's a todo item for when I upgrade 
gcc/binutils.

I've stayed at 4.1.2 as long as I have because I haven't gotten arm soft-float 
to work with --disable-shared (or static linking) with anything newer.  
Unfortunately, gcc 4.x only puts the soft float code into libgcc_s.so, and 
not in libgcc.a.  Combining libgcc_s.so with cross compiling is brittle and 
easily broken, and with static linking is _insane_, so I 
just --disable-shared which says use libgcc.a for everything on the cross 
compiler.

I have a working patch to fix it for gcc 4.1.2, but I gave up on my last 
attempt at upgrading (moving to gcc 4.2.2) after a _week_ of trying to get it 
to work.

According to my blog ( http://landley.net/notes-2007.html#12-08-2007 ) I got 
farther telling gcc to build bfin-elf instead of bfin-linux, but I vaguely 
recall that disabled something in the headers which some other package needed 
to build itself.  (It's been long enough I've forgotten the details.  If 
you're honestly interested I can give it another try and see what breaks...)

Really, "it's not in qemu" is what's kept me from paying more attention to it.  
I have m68k, sh4, and alpha pending with at least partial qemu support if I 
feel like poking at other architectures.  Plus arm big endian, fixing that 
one bug in sparc, 64 bit powerpc...

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.