From 6b465e150d1a1a2001430af684a7e2f28eebc683 Mon Sep 17 00:00:00 2001
From: spaun2002 <spaun2002mobile@gmail.com>
Date: Fri, 30 Apr 2021 19:54:23 -0700
Subject: [PATCH] Remove m1 from multilibs for GCC11 on SH arch.

GCC11 somehow has different set of multilibs on SH arch than what GCC10 had.
In particular:

$ gcc10 -print-multi-lib | sed -r -e 's/@/ -/g;'
.;
mb; -mb
m2; -m2
m2e; -m2e
m4; -m4
m4-single; -m4-single
m4-single-only; -m4-single-only
mb/m2; -mb -m2
mb/m2e; -mb -m2e
mb/m4; -mb -m4
mb/m4-single; -mb -m4-single
mb/m4-single-only; -mb -m4-single-only
mb/m2a; -mb -m2a
mb/m2a-single; -mb -m2a-single

$ gcc11 -print-multi-lib | sed -r -e 's/@/ -/g;'
.;
mb; -mb
m2; -m2
m2e; -m2e
m4; -m4
m4-single; -m4-single
m4-single-only; -m4-single-only
mb/m1; -mb -m1
mb/m2; -mb -m2
mb/m2e; -mb -m2e
mb/m4; -mb -m4
mb/m4-single; -mb -m4-single
mb/m4-single-only; -mb -m4-single-only
mb/m2a; -mb -m2a
mb/m2a-single; -mb -m2a-single

mb/m1 fails to build libgcc as libgcc uses opcodes that were not
available in SH-1: libgcc/config/sh/lib1funcs.S uses 'bt/s' and 'dt'
instructions that, according to https://antime.kapsi.fi/sega/files/h12p0.pdf become available in the SH-2 only.

So I removed mb/m1 from the multilibs fog GCC11 and SH arch.
Another option would be to try not to build libgcc for this combination
of the gcc version and archichecture, but I thought this fix would be
more robust.

Signed-off-by: Nik Konyuchenko <spaun2002mobile@gmail.com>
---
 config/cc/gcc.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/config/cc/gcc.in b/config/cc/gcc.in
index c3918e8a..01d72536 100644
--- a/config/cc/gcc.in
+++ b/config/cc/gcc.in
@@ -84,6 +84,7 @@ config CC_GCC_EXTRA_CONFIG_ARRAY
 config CC_GCC_MULTILIB_LIST
     string "List of multilib variants"
     depends on MULTILIB
+    default "m2,m2e,m4,m4-single,m4-single-only,m2a,m2a-single" if GCC_V_11 && ARCH_SH
     help
       Architecture-specific option of expanding or restricting the list of
       the multilib variants to be built. Refer to GCC installation manual