Re: PPC64: gcc currently compiles for power4 by default, causing glibc's sqrtf to fail on e6500
On 02/06/2018 07:29 PM, Bas Vermeulen wrote:
> I get that. But configure in the gcc sources doesn't actually process those. So while they are in rules2, it doesn't actually change anything.
>
> See https://github.com/gcc-mirror/gcc/blob/da8dff89fa9398f04b107e388cb706517ced9505/configure and search for with-cpu (which would catch both --with-cpu-32 and
> --with-cpu-64), and you won't find it there.
I really don't think that Matthias Klose had put those there without testing.
"--with-cpu-*" is a common configure switch supported by gcc across all
architectures. We use it on sparc64 as well, for example to set the
default CPU to UltraSPARC for 32-bit sparc.
Also, you're looking at the wrong file. It's in gcc/gcc/config.gcc:
> https://github.com/gcc-mirror/gcc/blob/master/gcc/config.gcc
Adrian
--
.''`. John Paul Adrian Glaubitz
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`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
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