Re: [ECOS] Synthetic target on linux x86_64 host

[Ross Younger <wry at ecoscentric dot com>]

Tarmo Kuuse wrote:
> Can synthetic target even be built with native x86_64 tools?

As Andrew has said it's not a supported environment - synth predates x86_64 
by some years - and I suspect would require a proper porting effort in due 
course.

However, I did find myself poking at the synth target on my workstation a 
few weeks ago (Ubuntu 8.10, 64-bit) and was able to get it going, after a 
fashion, without very much trouble (and without having to know much about 
x86/x86_64 guts!) in order to play with some new code I was writing.

I was using the eCos i386-elf toolchain; the syscalls and so on all seemed 
to just work thanks to x86_64's backwards compatibility (and I have various 
32-bit compatibility libs installed, which may or may not have helped).

I manually configured my ecos.ecc to use i386-elf, and once I had built eCos 
I had to edit target.ld by hand and remove the mention of libgcc_eh.a in 
order for my test applications to link. For debugging, the native gdb (not 
i386-elf-gcc!) just worked.

Obviously, running synth cross-architecture in this way is not tested at all 
- it seemed to work for my limited purposes, and might for you, but if it 
breaks you get to keep both pieces :-)


Ross

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