nios2: build multilib toolchain

This how we had it in the old SDK.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

configs/nios2.config

@@ -23,3 +23,4 @@ CT_CC_LANG_CXX=y
 CT_DEBUG_GDB=y
 CT_ISL_V_0_18=y
 CT_LIBICONV_NEEDED=y
+CT_MULTILIB=y

patches/gcc/8.2.0/0002-nios2-add-multilib-support.patch

@@ -0,0 +1,30 @@
+From a59a1adfbf64ab86f0f1025d6ae3fd3961946626 Mon Sep 17 00:00:00 2001
+From: Anas Nashif <[email protected]>
+Date: Mon, 18 Feb 2019 14:32:06 -0500
+Subject: [PATCH 2/2] nios2: add multilib support
+
+Signed-off-by: Anas Nashif <[email protected]>
+---
+ gcc/config/nios2/t-nios2 | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/gcc/config/nios2/t-nios2 b/gcc/config/nios2/t-nios2
+index ca2f46d..311e46b 100644
+--- a/gcc/config/nios2/t-nios2
++++ b/gcc/config/nios2/t-nios2
+@@ -18,9 +18,9 @@
+ # along with GCC; see the file COPYING3.  If not see
+ # <http://www.gnu.org/licenses/>.
+ 
+-# MULTILIB_OPTIONS = mno-hw-mul/mhw-mulx mcustom-fpu-cfg=60-1/mcustom-fpu-cfg=60-2
+-# MULTILIB_DIRNAMES = nomul mulx fpu-60-1 fpu-60-2
+-# MULTILIB_EXCEPTIONS = 
++MULTILIB_OPTIONS = mno-hw-mul/mhw-mulx mcustom-fpu-cfg=60-1/mcustom-fpu-cfg=60-2
++MULTILIB_DIRNAMES = nomul mulx fpu-60-1 fpu-60-2
++MULTILIB_EXCEPTIONS = 
+ 
+ # MULTILIB_OPTIONS += mel/meb
+ # MULTILIB_DIRNAMES += le be
+-- 
+2.19.1
+