[OE-core] Reproducible build problem with BB_NUMBER_THREADS=8

[Richard Purdie]

On Tue, 2011-11-15 at 21:19 +0100, Henning Heinold wrote:
> On Tue, Nov 15, 2011 at 12:03:45PM +0100, Eric Bénard wrote:
> > Hi,
> > 
> > I often meet a problem related to C++ headers which are not found
> > (despite existing)n often when bitbake starts compiling mysql &
> > directfb.
> > I tested on 2 build hosts (both with Core i7, one i686 ubuntu, one
> > x64_64 Fedora) and manage to reproduce the problem easily with
> > BB_NUMBER_THREADS=8 in both cases.
> > 
> > The configuration is quite simple :
> > angstrom setup script + beagleboard machine + bitbake qt4e-demo-image
> > with
> > PARALLEL_MAKE     = "-j6"
> > BB_NUMBER_THREADS = "8"
> 
> Hi Eric,
> 
> I found another problem with the crosscompiler setup and c++,
> while compile llvm with cmake.
> 
> In recipes-devtools/gcc/gcc-configure-cross.inc we set
> 
> EXTRA_OECONF_PATHS = "--with-local-prefix=${STAGING_DIR_TARGET}${target_exec_prefix} \
>                       --with-gxx-include-dir=${target_includedir}/c++ \
>                        --with-sysroot=${STAGING_DIR_TARGET} \
>                        --with-build-sysroot=${STAGING_DIR_TARGET}"
> 
> 
> which results in a headersearch path for c++
> 
>  .../usr/usr/include/c++
> 
> unfornatly I do not have the time to test it some more. But this little patch plus INC bumping
> sovled it for my setup:
> 
> -EXTRA_OECONF_PATHS = "--with-local-prefix=${STAGING_DIR_TARGET}${target_exec_prefix} \
> +EXTRA_OECONF_PATHS = "--with-local-prefix=${STAGING_DIR_TARGET} \

How does that cause something which sometimes works and sometimes does
not? Either it would work or wouldn't if this were the problem but not
"sometimes"?

Cheers,

Richard