From 9cb80b6cc56cd775e54119371a317384693430de Mon Sep 17 00:00:00 2001
From: r-a-sattarov <51679282+r-a-sattarov@users.noreply.github.com>
Date: Tue, 12 Sep 2023 00:09:48 +0300
Subject: [PATCH] Added e2k support (MCST Elbrus 2000) (#5222)

- Add e2k target to config.guess
- Update config-ix.cmake to support e2k

E2K - this is VLIW/EPIC architecture, like Intel Itanium (IA-64)
architecture.

Ref:
1) https://en.wikipedia.org/wiki/Elbrus_2000
2)
https://lists.gnu.org/archive/html/config-patches/2015-03/msg00000.html
---
 autoconf/config.guess | 3 +++
 cmake/config-ix.cmake | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/autoconf/config.guess b/autoconf/config.guess
index 411b8419de..cf0541d1f1 100755
--- a/autoconf/config.guess
+++ b/autoconf/config.guess
@@ -909,6 +909,9 @@ EOF
     crisv32:Linux:*:*)
 	echo crisv32-axis-linux-gnu
 	exit ;;
+    e2k:Linux:*:*)
+	echo ${UNAME_MACHINE}-unknown-linux-gnu
+	exit ;;
     frv:Linux:*:*)
 	echo frv-unknown-linux-gnu
 	exit ;;
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 677ad7ff58..01b30568a9 100644
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -367,6 +367,8 @@ elseif (LLVM_NATIVE_ARCH MATCHES "wasm64")
   set(LLVM_NATIVE_ARCH WebAssembly)
 elseif (LLVM_NATIVE_ARCH MATCHES "riscv64")
   set(LLVM_NATIVE_ARCH RISCV)
+elseif (LLVM_NATIVE_ARCH MATCHES "e2k")
+  set(LLVM_NATIVE_ARCH E2K)
 else ()
   message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
 endif ()