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From: Jonathan Wakely <jwakely.gcc@gmail.com>
Date: Fri, 13 May 2022 17:43:50 +0100
Message-ID: <CAH6eHdS3pQ+1pbh013KtPyT_Jh42VeTDhm_2xsnr4fi7W+4Bgg@mail.gmail.com>
Subject: Re: bootstrap fails on Debian ppc64 with fatal error:
 bits/libc-header-start.h: No such file or directory
To: Xi Ruoyao <xry111@xry111.site>
Cc: Dennis Clarke <dclarke@blastwave.org>, gcc-help <gcc-help@gcc.gnu.org>
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On Fri, 13 May 2022 at 17:21, Xi Ruoyao via Gcc-help
<gcc-help@gcc.gnu.org> wrote:
>
> On Fri, 2022-05-13 at 12:15 -0400, Dennis Clarke via Gcc-help wrote:
> >
> > > There has to be some other configure option in the salad to mix in.
>
> No, not "has to be".  It depends on what you want.
>
> If you don't need multilib (i. e. the ability to compile "Hello world"
> program for 32-bit PPC), then --disable-multilib.
>
> If you need it, you really need to RTFM to get how to install 32-bit
> libraries with headers on Debian, as it's OT with gcc-help.
>
> > Other than just RTFM.

Yeah, the point is that unless you use --disable-multilib you need both:

/usr/include/powerpc64-linux-gnu
*and*
/usr/include/powerpc-linux-gnu

i.e. the 64-bit libc headers *and* the 32-bit libc headers.