Rogelio Serrano schrieb:
> How does apple do it?
>
> With Mach-o?
Yes. There can be several binary "streams" in a single file and they
are filtered by the processor architecture when e.g. calling the linker
tool ld or nm.
> Can it be be done with elf too? Or is it enough to compile and cross
I don't know.
> compile and just put them all together in an application bundle?
I don't know how regular GNUstep is solving this (if at all).
mySTEP does it in the following way:
Application.app/Contents
/MacOS
Application <- this is the Mach-O universal binary
/Linux-ARM
Application <- this is the ARM-ELF binary
/Resources
/Info.plist
and the runtime system (i.e. NSBundle and NSWorkspace) of mySTEP knows
to look for an -executablePath at Contents/Linux-ARM and not in /MacOS
The same is doen for .bundle and .framework (with a slightly different
structure). Therfore, mySTEP allows cross-platform universal binaries
that also run on MacOS X.
-- hns
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