From 1d0b1138c479b5b414362bbce43aebe70ac4eeb5 Mon Sep 17 00:00:00 2001
From: Jiuyang Liu
Date: Sat, 7 Nov 2020 08:42:51 +0000
Subject: -full64 is required to detect VCS. (#1930)

---
 src/main/scala/firrtl/FileUtils.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/main/scala/firrtl/FileUtils.scala b/src/main/scala/firrtl/FileUtils.scala
index ff997168..2cc2961e 100644
--- a/src/main/scala/firrtl/FileUtils.scala
+++ b/src/main/scala/firrtl/FileUtils.scala
@@ -91,7 +91,8 @@ object FileUtils {
     * Instead we try to run the executable itself (with innocuous arguments) and interpret any errors/exceptions
     *  as an indication that the executable is unavailable.
     */
-  lazy val isVCSAvailable: Boolean = isCommandAvailable(Seq("vcs", "-platform"))
+  lazy val isVCSAvailable: Boolean =
+    isCommandAvailable(Seq("vcs", "-platform")) || isCommandAvailable(Seq("vcs", "-full64", "-platform"))
 
   /** Read a text file and return it as a Seq of strings
     * Closes the file after read to avoid dangling file handles
-- 
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