Suppress GNU make jobserver magic in runtest.rb

Fixes https://github.com/google/kati/issues/60

Change-Id: I2f539f5c41f96a302a73f8cc5c44332b4f4cd7d3

1 files changed, 4 insertions, 0 deletions

diff --git a/runtest.rb b/runtest.rb
index 330c8b1..9ad9193 100755
--- a/runtest.rb
+++ b/runtest.rb
@@ -16,6 +16,10 @@
 
 require 'fileutils'
 
+# suppress GNU make jobserver magic when calling "make"
+ENV.delete('MAKEFLAGS')
+ENV.delete('MAKELEVEL')
+
 while true
   if ARGV[0] == '-s'
     test_serialization = true