[dpdk-dev] [PATCH v2 01/10] build: add an option to enable LTO build

[Bruce Richardson]

On Thu, Sep 19, 2019 at 02:28:04PM +0100, Ray Kinsella wrote:
> 
> 
> On 19/09/2019 13:35, Andrzej Ostruszka wrote:
> > On 9/18/19 3:32 PM, Ray Kinsella wrote:
> ...>
> > Compilation time is much longer.  In a normal hack|fix/compile/repeat
> > cycle with "compile" part being simple "make" the link time might be a
> > bit annoying.  So I imagine keeping LTO off for the most part of the dev
> > cycle and then at the end when doing release/cleanup turn LTO on - to
> > either get release build ready or to get some set of warnings that you
> > address before yet another attempt to release build.  
> 
> Well look, I would say a few things.
> 
> 1. I see build times going down dramatically with Meson/Ninja in any case.

In the general case yes, but mainly it helps if you have a large number of
cores. For anyone building in a CI with only a couple of cores, meson+ninja
isn't going to help much.

/Bruce