[Buildroot] [PATCH] dependencies/cmake: blacklist cmake 3.7

[Yann E. MORIN]

Jörg, All,

On 2017-02-27 18:25 +0100, Yann E. MORIN spake thusly:
> On 2017-02-27 18:12 +0100, Jörg Krause spake thusly:
> > On Sun, 2017-02-26 at 23:42 +0100, Yann E. MORIN wrote:
> > > cmake-3.7 has a bug in how it handles rpath, linking with libraries
> > > from
> > > the host.
> > > 
> > > Until we completely understand the issue, just blacklist cmake-3.7.
> > > 
> > > The issue has been reported upstream:
> > >     http://public.kitware.com/pipermail/cmake/2017-February/064970.ht
> > > ml
> > 
> > Brad King from Kitware replied today [1]. In short, Brad does not think
> > there anything wrong about handling the rpath and supposes to load a
> > custom platform cmake file instead of the Linux one.
> > 
> > [1] http://public.kitware.com/pipermail/cmake/2017-February/065063.html
> 
> OK, so what we would have to do (basically):
> 
>   - copy Modules/Platform/Linux.cmake to Modules/Platform/Buildroot.cmake
> 
>   - tweak that file so that the two settings (lib32 and lib64) are now
>     FALSE in that file
> 
>   - tweak our support/misc/toolchain.cmake to set(CMAKE_SYSTEM_NAME Buildroot)
> 
> and we'd be all good?
> 
> Or alternatively:
> 
>   - add Modules/Platform/Buildroot.cmake, which:
>     - includes Modules/Platform/Linux.cmake
>     - sets the the two settings (lib32 and lib64) to FALSE
> 
>   - tweak our support/misc/toolchain.cmake to set(CMAKE_SYSTEM_NAME Buildroot)

So I tested that last solution, and it indeed fixes the build. Woot!

Of course, this is only for when we build out own cmake, not when we use
the host pre-installed one. I'll try to see tonight if we can do similar
for it, too.

Thanks for the hints! :-)

Regards,
Yann E. MORIN.

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