Re: armhf: neon instruction ?
Hi Lennart !
On Mon, Jan 10, 2022 at 4:21 PM Lennart Sorensen
<lsorense@csclub.uwaterloo.ca> wrote:
>
> On Mon, Jan 10, 2022 at 03:49:56PM +0100, Mathieu Malaterre wrote:
> > Dear arm porters,
> >
> > Could someone please clarify if I can build a package using gcc flags such as:
> >
> > -march=armv7-a -mfpu=neon-vfpv4 -mfloat-abi=hard -mfp16-format=ieee
> >
> > Ref:
> >
> > * https://salsa.debian.org/debian-phototools-team/highway/-/blob/master/CMakeLists.txt#L182-185
>
> Well the debian armhf specification does NOT require neon support,
> so packages should not require neon unless it is optional and provided
> as runtime detected code or an alternate library to load or whatever
> method works.
Please check:
https://packages.qa.debian.org/f/fftw3.html
Search for `-mfpu=neon` at:
* https://buildd.debian.org/status/fetch.php?pkg=fftw3&arch=armhf&ver=3.3.8-2&stamp=1536684083&raw=0
I believe my issue (as explained by Arnd) is indeed the vfpv4 features.
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