Am 04.10.2010 18:00, schrieb Khem Raj: > On Mon, Oct 4, 2010 at 1:08 AM, Thilo Fromm <[email protected]> wrote: >> Hello Frans, >> >>>>> I tracked it down - libunwind publishes unwind.h, and gcc uses an >>>>> internal >>>>> file of the same name while being built. >>>> >>>> Yes gcc has its own version of libunwind which it used unless >>>> configured with --with-system-libunwind >>>> IIUC the problem happens with target gcc not with cross-gcc. target >>>> gcc is built using cross-gcc and >>>> <sysroot>/use/include could be preferred over the location of >>>> libunwind.h which is in gcc sources >>>> If thats the case then we need to fix gcc build to not look into >>>> standard sysroot/usr/include but prefer >>>> the local unwind.h when its using internal libunwind. The problem >>>> would not show up if the libunwind versions >>>> were matching but that may not be the case always and I dont know of >>>> hand how we can fix the gcc configury/build >>>> to ignore installed unwind.h >>>> >>>> You workaround would only work if build sequence was followed if some >>>> one just cleaned gcc and rebuild it >>>> the problem will resurface. >>>> >>> Thanks for the analysis Khem. >>> This is indeed more or less what I had expected. >>> >>> For me this patch gets a NAK as it does only masks the problvem in >>> some cases but not really solves it. >> >> You're right with this analysis; however, the patch enables Openembedded to >> be built *at all*. If you care less about whether you're able to actually >> build and if you have the time to wait until someone ventures deep into the >> gcc build and fixes the cause, then this is the way to go. >> >> For us, however, this patch is a valid workaround. It will make Openembedded >> work for us until the original issue is fixed. > > I think we should try to fix it in right way.
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