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-rw-r--r--unit-tests/opt-warnings-as-errors.mk4
1 files changed, 3 insertions, 1 deletions
diff --git a/unit-tests/opt-warnings-as-errors.mk b/unit-tests/opt-warnings-as-errors.mk
index 905753410db0..2302dd4794b5 100644
--- a/unit-tests/opt-warnings-as-errors.mk
+++ b/unit-tests/opt-warnings-as-errors.mk
@@ -1,7 +1,9 @@
-# $NetBSD: opt-warnings-as-errors.mk,v 1.3 2020/08/23 14:28:04 rillig Exp $
+# $NetBSD: opt-warnings-as-errors.mk,v 1.4 2020/11/09 20:50:56 rillig Exp $
#
# Tests for the -W command line option, which turns warnings into errors.
+.MAKEFLAGS: -W
+
.warning message 1
.warning message 2