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From: "unlvsur at live dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/110017] Crossback Compilation for multilib fails on
 latest ubuntu due to -mx32 being disabled by the linux kernel
Date: Sun, 28 May 2023 22:41:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110017

--- Comment #1 from cqwrteur <unlvsur at live dot com> ---
(In reply to cqwrteur from comment #0)
> I attempted crossback compilation for GCC, where the compiler is built on
> Linux, runs on Windows, and is targeted for Linux again. However, the bui=
ld
> system of libgcc includes a sanity test to detect the functionality of the
> compiler, which prevents the build for the -mx32 option and disables m32.
>=20
> Moreover, during crossback compilation, GCC specifically looks for the "c=
c"
> command instead of just "gcc," even in cases where it doesn't exist.
>=20
> Is there a way to remove or bypass the sanity test restriction for crossb=
ack
> compilation in this scenario?

Not the functionality. It detects whether -mx32 program could run but of co=
urse
it cannot because linux kernel disabled that.=