From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id A70F13858418; Wed, 31 May 2023 15:17:59 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A70F13858418
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1685546279;
	bh=CfKPTda72F5QpKS+/Nh3nt6DzbsG/ClOSajKIvIUab0=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=EuTRyZQ5ms1tEmeNXs0Qtpsdo1h8bZCOBlaJ17KuYwZMT4xlF70txvUkWz87H2g8O
	 T92QXc9AuvKYtM8Ou4/qJYuDRuPJtAuljOmMbGm/rqn9ISDo8/JyVXT6re7XuCzkl0
	 tkUKEzGgwvdk+ib5/ElSXbmSWQaY3oAYgQgtGd90=
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 15:17:59 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: build
X-Bugzilla-Severity: normal
X-Bugzilla-Who: tschwinge at gcc dot gnu.org
X-Bugzilla-Status: WAITING
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-106271-4-lqyMQfG1d8@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-106271-4@http.gcc.gnu.org/bugzilla/>
References: <bug-106271-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106271

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |doko at gcc dot gnu.org

--- Comment #4 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
..., and then I wondered: but how, then, are Debian/Ubuntu building GCC?

Per <https://packages.debian.org/experimental/gcc-13>,
<http://deb.debian.org/debian/pool/main/g/gcc-13/gcc-13_13.1.0-3.debian.tar=
.xz>,
there is a 'debian/patches/gcc-multiarch.diff' file, which contains "Remain=
ing
multiarch patches, not yet submitted upstream", which (amongst others)
includes:

    --- a/src/gcc/config/riscv/t-linux
    +++ b/src/gcc/config/riscv/t-linux
    @@ -1,3 +1,5 @@
     # Only XLEN and ABI affect Linux multilib dir names, e.g. /lib32/ilp32=
d/
     MULTILIB_DIRNAMES :=3D $(patsubst rv32%,lib32,$(patsubst
rv64%,lib64,$(MULTILIB_DIRNAMES)))
     MULTILIB_OSDIRNAMES :=3D $(patsubst lib%,../lib%,$(MULTILIB_DIRNAMES))
    +
    +MULTIARCH_DIRNAME :=3D $(call if_multiarch,$(firstword $(subst -,
,$(target)))-linux-gnu)=