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

[Florian Weimer <fweimer@redhat.com>]

* 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