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-rw-r--r--ext/tk/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/tk/extconf.rb b/ext/tk/extconf.rb
index 7c35e63626..d269957aec 100644
--- a/ext/tk/extconf.rb
+++ b/ext/tk/extconf.rb
@@ -127,7 +127,7 @@ def maybe_64bit?
/64|universal|s390x/ =~ RUBY_PLATFORM
end
-if defined?(Logging.quiet) and Logging.quiet
+if defined?(Logging.quiet) and Logging.quiet and /--jobserver-fds=/ !~ ENV["MAKEFLAGS"]
def progress(s)
print(s)
end