[OE-core] [PATCH] cmake: add CMAKE_SYSROOT to generated toolchain file

[Mikko.Rapeli at bmw.de]

On Fri, Aug 24, 2018 at 08:51:42AM -0700, Khem Raj wrote:
> On Fri, Aug 24, 2018 at 8:48 AM <Mikko.Rapeli at bmw.de> wrote:
> > So to me it looks like using SYSTEM with target_include_directories()
> > is no longer possible with CMake and gcc > 6:
> >
> >
> > https://cmake.org/cmake/help/v3.10/command/target_include_directories.html?highlight=target_include_directories
> >
> 
> That’s right there is a patch I did  in WebKitgtk recipe in Oe Core you
> might want to include similar fixes for this package the patch actually it
> a workaround but then I also think using isystem in apps is a bad idea

Yes, I tend to agree, but developers have used this to silence compiler
warnings from system header files.

In a few cases I saw that there were no longer any warnings coming from the
headers but in some others there were.

Any other ideas how to suppress compiler wanings from system headers?

-Mikko