From 91c52da3af8eb4e522253a19fdd0abefd850eda1 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Thu, 12 Sep 2019 16:12:11 +0200
Subject: Fix cerl script for SunOS

syntax error at line 318: `taskset1=$' unexpected

A real Bourne Shell does not parse arithmetic (( syntax.

And expr command does not support << bit shift.
---
 erts/etc/unix/cerl.src | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/erts/etc/unix/cerl.src b/erts/etc/unix/cerl.src
index 59de9bdec8..d85a36acd4 100644
--- a/erts/etc/unix/cerl.src
+++ b/erts/etc/unix/cerl.src
@@ -315,8 +315,13 @@ if [ "x$GDB" = "x" ]; then
 	    ncpu=`cat /proc/cpuinfo | grep -w processor | wc -l`
             # Choose a random core in order to not collide with any other valgrind
             # run on the same machine.
-            taskset1=$((1 << (`shuf -i 1-$ncpu -n 1` - 1) ))
-	    taskset1="taskset $taskset1"
+	    cpu=`shuf -i 1-$ncpu -n 1`
+	    mask=1
+	    while [ $cpu -gt 1 ]; do
+		mask=`expr $mask \* 2`
+		cpu=`expr $cpu - 1`
+	    done
+	    taskset1="taskset $mask"
 	    sched_arg="-S$ncpu:$ncpu"
 	else
 	    taskset1=
-- 
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