File riscv.patch of Package ghc-double-conversion

From 8316ed5bf405835558a476e528d8e1d0adf69dd9 Mon Sep 17 00:00:00 2001
From: Stefan O'Rear <stefanor@cox.net>
Date: Thu, 17 Nov 2016 09:54:33 -0800
Subject: [PATCH] Add support for RISC-V

Index: double-conversion-2.0.2.0/double-conversion/src/utils.h
===================================================================
--- double-conversion-2.0.2.0.orig/double-conversion/src/utils.h
+++ double-conversion-2.0.2.0/double-conversion/src/utils.h
@@ -62,7 +62,8 @@
     defined(__sparc__) || defined(__sparc) || defined(__s390__) || \
     defined(__SH4__) || defined(__alpha__) || \
     defined(_MIPS_ARCH_MIPS32R2) || \
-    defined(__AARCH64EL__) || defined(__aarch64__)
+    defined(__AARCH64EL__) || defined(__aarch64__) || \
+    defined(__riscv)
 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #elif defined(__mc68000__)
 #undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS