Re: gcc-4.7.4: libgcc2.h:157: error: unable to emulate 'TF'

["Gábor Boskovits" <boskovits@gmail.com>]

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U.Mutlu <um@mutluit.com> ezt írta (időpont: 2018. júl. 10., K, 5:53):

> Jan Nieuwenhuizen wrote on 07/09/2018 09:40 PM:
> > U.Mutlu writes:
> >
> >> What do you get if you grep for "error: " in the xxx/libgcc/config.log
> >> under the builddir?
> >
> > janneke@guix-x86 /tmp/guix-build-gcc-mesboot-4.7.4.drv-0/gcc-4.7.4$
> grep 'error: ' i386-unknown-linux/libgcc/config.log
> > conftest.c:9:28: error: ac_nonexistent.h: No such file or directory
> > conftest.c:13: error: size of array 'test_array' is negative
> > conftest.c:13: error: size of array 'test_array' is negative
> > conftest.c:13: error: size of array 'test_array' is negative
> > conftest.c:13: error: size of array 'test_array' is negative
> > conftest.c:14: error: size of array 'test_array' is negative
> > conftest.c:14: error: size of array 'test_array' is negative
> > conftest.c:14: error: size of array 'test_array' is negative
> > conftest.c:14: error: size of array 'test_array' is negative
> > conftest.c:14: error: size of array 'test_array' is negative
> > conftest.c:11: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before 'x'
> > conftest.c:11: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before '_Fract'
> >
> >> It would also be helpful if you could post also your libiberty/config.h
> >
> > Sure, attached.
> >
> > janneke
>
>
> You have attached config.h of 2 targets.
> Is just one of them failing, or both?
> And of course: are they both using the same target arch, just differing in
> 64bit/32bit?
>
> The difference in them is:
> diff /tmp/build-i686-pc-linux-gnu--libiberty--config.h
> /tmp/host-i386-unknown-linux--libiberty--config.h |  less -Sn
> 171c171
> < #define HAVE_MMAP 1
> ---
>  > /* #undef HAVE_MMAP */
> 444c444
> < #define STACK_DIRECTION -1
> ---
>  > #define STACK_DIRECTION 0
>
> If they both are the same arch then I would suggest to get the one fixed
> first
> where the STACK_DIRECTION is seemingly detected wrongly.
>
>
> And don't use -Werror when compiling, ie. don't treat warnings as error.
>
>
> And try to find out the reason for the above configure-error:
>
>  > conftest.c:11: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before 'x'
>  > conftest.c:11: error: expected '=', ',', ';', 'asm' or '__attribute__'
> before '_Fract'
>
>
> I forgot to ask: please post also the "error: "'s in libiberty/config.log,
> ie.
> the grep-output like above.
>
>
>
>
It seems that the errors you were getting are related to 128 bit floating
point support. It also seems that 128 bit floating point support is enabled
on 64 bits. I'm not sure about the 32 bit case though, do you get the same
error there?

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