https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65828
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |trippels at gcc dot gnu.org
--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Vittorio Zecca from comment #6)
> (In reply to Steven Noonan from comment #1)
> > If you want a nice tarball with a ready-to-go repro case, I've put it here:
> >
> > https://www.uplinklabs.net/files/lto-65828.tar.xz
> >
> > Should just be able to run something like:
> >
> > $ /usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.2/lto1 -quiet -dumpdir .libs/
> > -dumpbase libglib-2.0.so.0.4400.0.wpa -mtune=generic -march=x86-64
> > -mtune=generic -march=x86-64 -auxbase libglib_2_0_la-gallocator -O2 -O2
> > -version -fno-trapv -fPIC
> > -fltrans-output-list=libglib-2.0.so.0.4400.0.ltrans.out -fwpa
> > -fresolution=libglib-2.0.so.res @ccWGeoup.args
> >
> > from inside the extracted directory and see the issue.
>
> I just run it with gcc-5.2.0 and I got the following error:
>
> ./repro.sh
> +
> /home/vitti/local/gcc-5.2.0/libexec/gcc/x86_64-unknown-linux-gnu/5.2.0/lto1
> -quiet -dumpdir .libs/ -dumpbase libglib-2.0.so.0.4400.0.wpa -mtune=generic
> -march=x86-64 -mtune=generic -march=x86-64 -auxbase
> libglib_2_0_la-gallocator -O2 -O2 -version -fno-trapv -fPIC
> -fltrans-output-list=libglib-2.0.so.0.4400.0.ltrans.out -fwpa
> -fresolution=libglib-2.0.so.res @ccWGeoup.args
> GNU GIMPLE (GCC) version 5.2.0 (x86_64-unknown-linux-gnu)
> compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version 3.1.2,
> MPC
> version 1.0.2
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> GNU GIMPLE (GCC) version 5.2.0 (x86_64-unknown-linux-gnu)
> compiled by GNU C version 5.2.0, GMP version 6.0.0, MPFR version 3.1.2,
> MPC
> version 1.0.2
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> lto1: fatal error: bytecode stream generated with LTO version 3.0 instead of
> the expected 4.0
> compilation terminated.
That is expected. Using lto files from older compilers is not supported.
