From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 977493858012; Sun,  6 Dec 2020 23:35:45 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 977493858012
From: "bero at lindev dot ch" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug build/26360] glibc 2.32 fails to crosscompile to
 ppc64le-linux-gnu using gcc 10.2.0
Date: Sun, 06 Dec 2020 23:35:45 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: build
X-Bugzilla-Version: 2.32
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: bero at lindev dot ch
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: security-
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-26360-131-teTjmT544S@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-26360-131@http.sourceware.org/bugzilla/>
References: <bug-26360-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: glibc-bugs@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Glibc-bugs mailing list <glibc-bugs.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/glibc-bugs/>
List-Help: <mailto:glibc-bugs-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/glibc-bugs>,
 <mailto:glibc-bugs-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Sun, 06 Dec 2020 23:35:45 -0000

https://sourceware.org/bugzilla/show_bug.cgi?id=3D26360

--- Comment #4 from Bernhard Rosenkr=C3=A4nzer <bero at lindev dot ch> ---
I finally got around to debugging this.

The problem is that if you build a first stage gcc crosscompiler (without g=
libc
headers available at the point), it defaults to 64-bit long doubles, whereas
glibc assumes 128-bit long doubles.

Probably the best fix is to teach gcc to assume 128-bit long doubles when
targeting ppc64le glibc targets even if the headers aren't there yet [either
that, or add support for 64-bit long doubles to glibc] -- until then the
workaround is to add --with-long-double-128 to ./configure in the gcc boots=
trap
compiler.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=