Re: [microblaze-uclinux] Building microblaze toolchain

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Scott,

Scott Thibault wrote:

> In my continued quest to build microblaze uClinux executables on
> Windows, I'm trying to build the tool chain with MinGW.  I tried using
> the EDK 6.3 cross-compiler, but I get a bad magic error when trying to
> load them under uClinux.  I'm guessing here that there are some version
> differences between the uClinux and the EDK toolchain.

Nothing so serious - to build uClinux executables you have to use a 
special little tool called elf2flt - it converts elf binaries into so 
called "flat binaries" with relocation information.

Here's what to do - in your edk6.3 toolchain, rename mb-ld to 
mb-ld.real, and copy the mb-ld file from a linux toolchain.  It's 
actually a script, so it should run just fine under some sort of *n*x 
emulation.

This script is a wrapper that runs elft2flt if necessary, and passes 
files on to the real linker (mb-ld.real).

Then grab the elf2flt sources from cvs.uclinux.org - configure and build 
it, put it in your toolchain bin directory renamed as mb-elf2flt

The configuration is a little tricky, you have to point it at various 
BFD and libiberty headers and libs that are produced when you build the 
binutils.  ./configure --help will tell you the options you need to provide.

> In any case, the Web site references a build_toolchain script file, but
> I can't find it anywhere.  Where do I get this file?

I'll have a look - I got all enthusiastic about putting up toolchain 
build instructions a while ago, but it sort of died...

> I just tried ./configure; make in the binutils directory and everything
> when okay (after a few trials), but I get something with the host and
> target = i686-pc-mingw32.

You'll need to specify target=microblaze...

John
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