patch for adding/fixing RISC-V multiarch support

easybuild/easyconfigs/g/GCCcore/GCCcore-12.x_riscv_multiarch_support.patch

@@ -0,0 +1,33 @@
+https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=47f95bc4be4eb14730ab3eaaaf8f6e71fda47690
+https://gcc.gnu.org/PR106271
+
+From 47f95bc4be4eb14730ab3eaaaf8f6e71fda47690 Mon Sep 17 00:00:00 2001
+From: Raphael Moreira Zinsly <[email protected]>
+Date: Tue, 22 Aug 2023 11:37:04 -0600
+Subject: [PATCH] RISC-V: Add multiarch support on riscv-linux-gnu
+
+This adds multiarch support to the RISC-V port so that bootstraps work with
+Debian out-of-the-box.  Without this patch the stage1 compiler is unable to
+find headers/libraries when building the stage1 runtime.
+
+This is functionally (and possibly textually) equivalent to Debian's fix for
+the same problem.
+
+gcc/
+	* config/riscv/t-linux: Add MULTIARCH_DIRNAME.
+---
+ gcc/config/riscv/t-linux | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/gcc/config/riscv/t-linux b/gcc/config/riscv/t-linux
+index 216d2776a18..a6f64f88d25 100644
+--- a/gcc/config/riscv/t-linux
++++ b/gcc/config/riscv/t-linux
+@@ -1,3 +1,5 @@
+ # Only XLEN and ABI affect Linux multilib dir names, e.g. /lib32/ilp32d/
+ MULTILIB_DIRNAMES := $(patsubst rv32%,lib32,$(patsubst rv64%,lib64,$(MULTILIB_DIRNAMES)))
+ MULTILIB_OSDIRNAMES := $(patsubst lib%,../lib%,$(MULTILIB_DIRNAMES))
++
++MULTIARCH_DIRNAME := $(call if_multiarch,$(firstword $(subst -, ,$(target)))-linux-gnu)
+-- 
+2.39.3