From 1ca8df632c4a6be88f3e84f037bd65399bfcd1b4 Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Mon, 8 Apr 2019 14:53:54 +0200
Subject: [PATCH] Add detection of RISC-V from __riscv

---
 include/boost/predef/architecture.h       |  1 +
 include/boost/predef/architecture/riscv.h | 41 +++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 include/boost/predef/architecture/riscv.h

diff --git a/boost/predef/architecture.h b/boost/predef/architecture.h
index 120d557..732d6f0 100644
--- a/boost/predef/architecture.h
+++ b/boost/predef/architecture.h
@@ -21,6 +21,7 @@ Distributed under the Boost Software License, Version 1.0.
 #include <boost/predef/architecture/ppc.h>
 #include <boost/predef/architecture/ptx.h>
 #include <boost/predef/architecture/pyramid.h>
+#include <boost/predef/architecture/riscv.h>
 #include <boost/predef/architecture/rs6k.h>
 #include <boost/predef/architecture/sparc.h>
 #include <boost/predef/architecture/superh.h>
diff --git a/boost/predef/architecture/riscv.h b/boost/predef/architecture/riscv.h
new file mode 100644
index 0000000..5ff2c3b
--- /dev/null
+++ b/boost/predef/architecture/riscv.h
@@ -0,0 +1,41 @@
+/*
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE_1_0.txt or copy at
+http://www.boost.org/LICENSE_1_0.txt)
+*/
+
+#ifndef BOOST_PREDEF_ARCHITECTURE_RISCV_H
+#define BOOST_PREDEF_ARCHITECTURE_RISCV_H
+
+#include <boost/predef/version_number.h>
+#include <boost/predef/make.h>
+
+/*`
+[heading `BOOST_ARCH_RISCV`]
+
+[@http://en.wikipedia.org/wiki/RISC-V] architecture.
+
+[table
+    [[__predef_symbol__] [__predef_version__]]
+
+    [[`__riscv`] [__predef_detection__]]
+    ]
+ */
+
+#define BOOST_ARCH_RISCV BOOST_VERSION_NUMBER_NOT_AVAILABLE
+
+#if defined(__riscv)
+#   undef BOOST_ARCH_RISCV
+#   define BOOST_ARCH_RISCV BOOST_VERSION_NUMBER_AVAILABLE
+#endif
+
+#if BOOST_ARCH_RISCV
+#   define BOOST_ARCH_RISCV_AVAILABLE
+#endif
+
+#define BOOST_ARCH_RISCV_NAME "RISC-V"
+
+#endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_ARCH_RISCV,BOOST_ARCH_RISCV_NAME)