1 files changed, 22 insertions, 0 deletions
diff --git a/unit-tests/suff-main.mk b/unit-tests/suff-main.mk
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+++ b/unit-tests/suff-main.mk
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+# $NetBSD: suff-main.mk,v 1.1 2020/10/18 16:33:18 rillig Exp $
+#
+# Demonstrate that an inference rule is considered the main target if its
+# suffixes are not known at the point of declaration.
+
+.1.2:
+	: Making ${.TARGET} from ${.IMPSRC}.
+
+# At this point, the target '.1.2' is a normal target.
+# Since it is the first target in the first dependency declaration,
+# it becomes the main target.
+
+next-main:
+	: Making ${.TARGET}
+
+# At this point, 'next-main' is effectively ignored.
+
+# Declaring both '.1' and '.2' as suffixes turns the '.1.2' target into an
+# inference rule (OP_TRANSFORM).  As a side effect, this target is no longer
+# a candidate for the main target.  Therefore the next target is selected as
+# the main target, which in this case is 'next-main'.
+.SUFFIXES: .1 .2