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Re: how to distinguish armel and armhf at runtime?

On 09/22/2017 03:57 PM, Uwe Kleine-König wrote:
> for the package sparse I have to distinguish armel and armhf. The reason
> is that sparse parses system headers and so has to know which cpp
> symbols to define. Usually it uses uname -m to distinguish platforms but
> that isn't suitable to tell armel and armhf apart.
> For armhf I need to define __ARM_PCS_VFP but that must be absent on armel.
> For upstreaming a fix it would be great if the test would not be Debian
> specific.

Inspect what platform the system shell was compiled for by running:

 readelf --arch-specific /bin/sh

then look for Tag_ABI_HardFP_use or Tag_ABI_VFP_args in the returned list.

Build time detection is pretty much covered since "all versions of gcc
since 4.6 have supported __ARM_PCS_VFP" flag [0].

[0] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45886#c6


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