From d19876e0e451d7531566583d2f25c5c9381f64f1 Mon Sep 17 00:00:00 2001
From: "W. J. van der Laan" <laanwj@protonmail.com>
Date: Sat, 3 Apr 2021 21:26:03 +0000
Subject: [PATCH] mes: Add RISC-V architecture detection.

* src/mes.c: Add ifdefs to detect when compiled on riscv32 or riscv64
architectures.
---
 src/mes.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mes.c b/src/mes.c
index 86699ba5..d0b507a1 100644
--- a/src/mes.c
+++ b/src/mes.c
@@ -1,6 +1,7 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
  * Copyright © 2016,2017,2018,2019,2020,2021 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
  *
  * This file is part of GNU Mes.
  *
@@ -59,6 +60,14 @@ mes_environment (int argc, char **argv)
   arch = "arm";
 #elif __x86_64__
   arch = "x86_64";
+#elif __riscv
+  #if __riscv_xlen == 32
+  arch = "riscv32";
+  #elif __riscv_xlen == 64
+  arch = "riscv64";
+  #else
+  #error riscv xlen not supported
+  #endif
 #else
 #error arch not supported
 #endif