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From: "sumbera at volny dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/100559] build failure of 32-bit Ada runtime after local
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Date: Thu, 13 May 2021 08:47:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100559

--- Comment #14 from Petr Sumbera <sumbera at volny dot cz> ---
(In reply to Eric Botcazou from comment #13)
> > $ cat gcc-11.1.0/gcc/config/sparc/t-sol2
> > MULTILIB_OPTIONS =3D m32/m64
> > MULTILIB_DIRNAMES =3D 32 sparcv9
> > MULTILIB_MATCHES =3D
> > MULTILIB_OSDIRNAMES =3D . sparcv9
>=20
> So you have a local modification after all, here is the pristine file:
>=20
> eric@fomalhaut:~/tmp/gcc-11.1.0> cat gcc/config/sparc/t-sol2
> MULTILIB_OPTIONS =3D m32/m64
> MULTILIB_DIRNAMES =3D sparcv8plus sparcv9
> MULTILIB_MATCHES =3D
> MULTILIB_OSDIRNAMES =3D . sparcv9
>=20
> You need to do s/sparcv8plus/32/ on $(srcdir)/gcc/ada/Makefile.rtl as wel=
l.

Thank you very much! I'm trying it now.

I don't know the history of the change:

https://github.com/oracle/solaris-userland/blob/master/components/gcc10/pat=
ches/001-multilib-sparc.patch

It has following comment:

#  We want sparc/i386 to match locations for their 32 bit support when buil=
ding
#  multilib.  For now use the more generic /32.  This has not been filed
#  upstream.

I wonder whether it makes sense to have it in upstream?=