#4624: Defects found through ICA
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Reporter: pierre.labastie | Owner: pierre.labastie
Type: enhancement | Status: assigned
Priority: normal | Milestone: 9.2
Component: Book | Version: SVN
Severity: normal | Resolution:
Keywords: |
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Comment (by pierre.labastie):
Replying to [comment:17 xry111]:
> Replying to [comment:9 pierre.labastie]:
> > '''gcc compilers (c++, gcc, cc1, cc1plus, ...) differ between first
and second build'''
> >
> > Using ''objdump -d'', it is found that the assembly code differ
between first and second build (different use of register, use of
different opcodes, ...). I suspect it has something to do with LTO, which
would be applied on second pass and not on first, but its highly
speculative.
> >
> > '''Solution'''
> > None yet... (any idea welcome!)
>
> '''Possible solution'''
>
> Do a 3-stage bootstrap for GCC. (removing `--disable-bootstrap`).
Or build BLFS GCC as soon as possible (with or without bootstrap). But I
think we'd rather avoid bootstrapping. Building gcc three times is already
rather time consuming. Thinking more about this: if nothing else, try a
2-stage bootstrap. Maybe it is enough. Those are just random thoughts
though. I'm building a 2-stage ICA saving build directories of gcc.
Hopefully, something should emerge from the comparison of the build
directories.
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Ticket URL: <http://wiki.linuxfromscratch.org/lfs/ticket/4624#comment:19>
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