[llvm-dev] (Thin)LTO llvm build

[Carsten Mattner via llvm-dev]

On Sun, Oct 2, 2016 at 6:41 AM, Teresa Johnson <tejohnson at google.com> wrote:
>
> On Sat, Oct 1, 2016 at 11:43 AM, Carsten Mattner <carstenmattner at gmail.com> wrote:
> >
> > On Sat, Oct 1, 2016 at 4:40 PM, Teresa Johnson <tejohnson at google.com> wrote:
> >
> > > I completely forgot to add -Wl,--gc-sections. The *-sections
> > > options enables gc-sections to work effectively. (edit: oh wait,
> > > it looks like you already have that one on your link command, so
> > > you should be set there!)
> > >
> > > Unfortunately, I just can't reproduce the DSO link error you are
> > > getting. I've tried building head bits with a 3.9 compiler, and
> > > 3.9 bits with the 3.9 compiler, to no avail.
> >
> > Thanks for looking into this. I'm chasing a more urgent bug this
> > weekend, so may not get around to another test for a day or two.
>
> Oh sure.

The chase ended successfully yesterday with a correction now in wider
testing. No urgent matter this Sunday.

> > > Can you zip up all of the inputs to your link and make it available to me?
> >
> > With my upload bandwidth it would be very impractical, sorry.
> > How about I share my scripts I use to checkout, configure and build?
>
>
> Ok

Will try to get to get today.

> > Should I try building trunk in ThinLTO mode using 3.9? I mean, is
> > trunk considered stable enough for building and later use as
> > occasional CC/CXX? I might try the build regardles, just to
> > check...
>
> I use trunk, but it depends on how close to the bleeding edge you
> are comfortable with. But like I said, I also tried bootstrapping
> with 3.9 (both trunk as well as 3.9 sources) and couldn't reproduce.

Hmm, so you're saying neither fails for you, right?