[Buildroot] Make C and CXX compiler cache in toolchainfile.cmake.in

[Yann E. MORIN <yann.morin.1998@free.fr>]

Arnout, All,

On 2018-03-30 21:57 +0200, Arnout Vandecappelle spake thusly:
> On 25-03-18 12:36, Michael Dick wrote:
> > My suggestion ist o use this patch. Is there any reason why the compilers are
> > not cached?
> 
>  Sounds to me like a good idea.
> 
>  Let's add Yann, Samuel and Luca in Cc as CMake experts :-P

I wonder at what time I gained this expertise level in a tool I rarely
use... ;-)

> For their
> convenience, here is the patch inline:
> 
> > --- /tmp/toolchainfile.cmake.in.orig    2018-03-25 12:32:03.353000419 +0200
> > +++ /tmp/toolchainfile.cmake.in 2018-03-25 12:32:52.647000419 +0200
> > @@ -58,8 +58,8 @@
> >  set(ENV{PKG_CONFIG_SYSROOT_DIR} "${RELOCATED_HOST_DIR}/@@STAGING_SUBDIR@@")
> >  
> >  # This toolchain file can be used both inside and outside Buildroot.
> > -set(CMAKE_C_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CC@@")
> > -set(CMAKE_CXX_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CXX@@")
> > +set(CMAKE_C_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CC@@" CACHE STRING "C Compiler")
> > +set(CMAKE_CXX_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CXX@@" CACHE STRING "CXX Compiler")

I have absolutely no clue what this means...

Regards,
Yann E. MORIN.

> >  if(@@TOOLCHAIN_HAS_FORTRAN@@)
> >    set(CMAKE_Fortran_FLAGS_DEBUG "" CACHE STRING "Debug Fortran FLAGS")
> >    set(CMAKE_Fortran_FLAGS_RELEASE " -DNDEBUG" CACHE STRING "Release Fortran FLAGS")
> 
> 
>  Michael, could you resubmit as a proper patch with commit log and
> Signed-off-by? See [1].
> 
>  Regards,
>  Arnout
> 
> [1] https://buildroot.org/downloads/manual/manual.html#submitting-patches
> 
> -- 
> Arnout Vandecappelle                          arnout at mind be
> Senior Embedded Software Architect            +32-16-286500
> Essensium/Mind                                http://www.mind.be
> G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
> LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
> GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

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