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Hi Seth, Simon,

Could you link (eg github mirror, or launchpad) the commit where it was introduced?

I don't remember, from my side, anything against use SIMD, I prefer to use it if it brings speed.
All I remember was long time ago someone complain that the KiCad source code was not building on non x86 platforms (eg: ARM, RaspberyPI.. etc) and the 3D viewer was one of the causes because of the use of SIMD..

I am not sure about how much compatibility of old machines KiCad need to support but I guess you can also set (try) some flags for GLM that limit the intrinsic usage.. but that may cause you issues again. :/

Mario Luzeiro

From: Kicad-developers <kicad-developers-bounces+mrluzeiro=ua.pt@xxxxxxxxxxxxxxxxxxx> on behalf of Seth Hillbrand <seth@xxxxxxxxxxxxx>
Sent: 29 April 2019 03:21
To: Simon Richter
Cc: KiCad Developers
Subject: Re: [Kicad-developers] GLM and GLM_FORCE_PURE

Am 2019-04-28 17:47, schrieb Simon Richter:
> Hi,
> it appears we can avoid running into the "constexpr" problem with GLM
> by either
>  - deleting "#define GLM_FORCE_PURE" from
> include/plugins/3dapi/xv3d_types.h
> or
>  - switching to C++14 mode
> Do we actually need the GLM_FORCE_PURE? The commit where it was
> introduced doesn't explain why, and inhibiting SIMD intrinsics on AMD64
> which always has at least SSE2 does't really make sense.

I think Mario is still on the list.  Perhaps he can shed some insight


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