[yocto] problems with cmake finding the c++ includes

[Paul Eggleton]

Hi Stefan,

On Wed, 27 Apr 2016 08:35:51 S.Jaritz at esa-grimma.de wrote:
> Thank you for taking time to check my problem. I fixed that. Maybe not how
> you will do it.
> My main problem still exists - the compiling problem when the std. c++
> includes needed to be compiled. Maybee you have an idea how to tell the
> cmake class where to search it's header files.

The problem is Build.cmake in the g3log sources is setting CMAKE_CXX_FLAGS 
outright instead of adding to it, with the result that the default arguments 
set by OE (most importantly --sysroot) aren't being supplied to the compiler, 
so it can't find the standard headers. Really that file needs to be patched - 
I've attached a patch to fix it which you can put in a "files" or "g3log" 
directory alongside the recipe and add a file:// pointer to in SRC_URI, see 
other recipes for examples).

Also attached is a patch to fix the fact that the libg3log.so library produced 
wasn't versioned, which our build system expects and if it's not the case you 
will get a QA error. It is possible to disable that check but this is a little 
neater.

(I wouldn't normally go this far, but I was in a curious mood this afternoon.)

Cheers,
Paul

PS if you could please retain the mailing list on replies (unless they need to 
be private) that would be great.

-- 

Paul Eggleton
Intel Open Source Technology Centre
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