[cfe-dev] [libunwind] __ELF__ macro for arm-none-eabi

[Zhao, Weiming via cfe-dev]

Hi,

I'm building libunwind for ARM baremetal using clang.
I notice that __ELF__ is used in libunwind and the macro is only defined 
for Linux target on ARM.
Should we also predefine that for arm-none-eabi target?
I have the patch in draft but not sure if this is the right way to do.

Thanks,
Weiming

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