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-rw-r--r--usr.bin/make/unit-tests/var-readonly.mk8
1 files changed, 7 insertions, 1 deletions
diff --git a/usr.bin/make/unit-tests/var-readonly.mk b/usr.bin/make/unit-tests/var-readonly.mk
index 67e6c0cb828..050b44d1b4e 100644
--- a/usr.bin/make/unit-tests/var-readonly.mk
+++ b/usr.bin/make/unit-tests/var-readonly.mk
@@ -1,4 +1,4 @@
-# $NetBSD: var-readonly.mk,v 1.2 2023/06/01 20:56:35 rillig Exp $
+# $NetBSD: var-readonly.mk,v 1.3 2023/06/19 15:37:48 sjg Exp $
# the answer
N = 42
@@ -9,6 +9,12 @@ N = 666
.error N ($N) should be 42
.endif
+# undef should fail
+.undef N
+.ifndef N
+.error N should not be undef'd
+.endif
+
.NOREADONLY: N
# now we can change it
N = 69