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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/106271] Bootstrap on RISC-V on Ubuntu 22.04 LTS:
 bits/libc-header-start.h: No such file or directory
Date: Wed, 31 May 2023 15:12:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106271

Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tschwinge at gcc dot gnu.o=
rg

--- Comment #3 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Gah, I ran into the same issue on gcc92.

I 'configure'd '--with-arch=3Drv64imafdc --with-abi=3Dlp64d --enable-multil=
ib'.

(In reply to Andrew Pinski from comment #1)
> OR multi-arch support is not in the riscv backend yet.

That seems to be the case indeed; at least I'm not seeing any 'if_multiarch'
etc. in 'gcc/config/riscv/'.


    $ find /usr/include/ -name libc-header-start.h
    /usr/include/riscv64-linux-gnu/bits/libc-header-start.h

Also, do potentially further distribution packages have to be installed, for
additional multilibs?  Like I have on an Ubuntu x86_64 GN/Linux system:

    $ find /usr/include/ -name libc-header-start.h
    /usr/include/i386-linux-gnu/bits/libc-header-start.h
    /usr/include/x86_64-linux-gnu/bits/libc-header-start.h
    $ dpkg -S /usr/include/i386-linux-gnu/bits/libc-header-start.h
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h
    libc6-dev:i386: /usr/include/i386-linux-gnu/bits/libc-header-start.h
    libc6-dev:amd64: /usr/include/x86_64-linux-gnu/bits/libc-header-start.h=