Re: Help compiling glibc 2.31 wih System V abi for powerpc

[Manolo Padron Martinez <manolopm@gmail.com>]

First, Thanks for the answer Florian!

I still have the same problem. libc_pic.a keeps telling me that
gettimeofday and time its using GNU ABI, and when it links libc.so it
becomes GNU ABI.
The reason that I need it in System V its I have an old powerpc with and
old linux distro, when I try to cross compile something for this machine I
get problems because it has an on libc, so I need libc and If I try to use
it with GNU ABI the program said "wrong ABI format" .


On Sat, Apr 16, 2022 at 12:16 PM Florian Weimer <fweimer@redhat.com> wrote:

> * Manolo Padron Martinez via Libc-help:
>
> > I'm trying to compile glibc for a device with a powerpc processor that
> have
> > an old distro.
> > I'm using debian and crosscompiling it.
> > It seems to compile but when I use readelf to check the abi of libc.so I
> > get UNIX - GNU.
> > I take a look to all .a files and I have seen that everything is compiled
> > with UNIX - System V except the entries related to gettimeofday and time
> in
> > libc_pic.a.
> >
> > I think I've tried everything but still get that part with UNIX - GNU.
> > The configure options I'm trying are this:
> >
> > --host=powerpc-linux-gnu --enable-oldest-abi  --prefix=/tmp/binglibc
> > --disable-werror CFLAGS='-D_GLIBCXX_USE_CXX11_ABI=0 -mcall-sysv-noeabi
> -O2
> > -U HAVE_ELFV2_ABI
>
> I'm not sure if -mcall-sysv-noeabi is safe.  -U HAVE_ELFV2_ABI won't
> have any effect for powerpc (32-bit).
>
> > Any idea what I could try?
>
> The GNU ABI probably comes from IFUNC usage, so you could try
> configuring with --disable-multi-arch.  But it would have to be a
> strange configuration where the ABI field would matter because your
> cross-toolchain is apparently compatible with it, and glibc is as well.
>
> Thanks,
> Florian
>
>