vendor/NetBSD/bmake/20201101

1 files changed, 25 insertions, 2 deletions

diff --git a/unit-tests/var-class-local.mk b/unit-tests/var-class-local.mk
index e75f08ba75a32..68696ea854af8 100644
--- a/unit-tests/var-class-local.mk
+++ b/unit-tests/var-class-local.mk
@@ -1,8 +1,31 @@
-# $NetBSD: var-class-local.mk,v 1.2 2020/08/16 14:25:16 rillig Exp $
+# $NetBSD: var-class-local.mk,v 1.4 2020/10/25 09:46:25 rillig Exp $
 #
 # Tests for target-local variables, such as ${.TARGET} or $@.
 
 # TODO: Implementation
 
+# Ensure that the name of the variable is exactly the given one.
+# The variable "@" is an alias for ".TARGET", so the implementation might
+# canonicalize these aliases at some point, and that might be surprising.
+# This aliasing happens for single-character variable names like $@ or $<
+# (see VarFind, CanonicalVarname), but not for braced or parenthesized
+# expressions like ${@}, ${.TARGET} ${VAR:Mpattern} (see Var_Parse,
+# ParseVarname).
+.if ${@:L} != "@"
+.  error
+.endif
+.if ${.TARGET:L} != ".TARGET"
+.  error
+.endif
+.if ${@F:L} != "@F"
+.  error
+.endif
+.if ${@D:L} != "@D"
+.  error
+.endif
+
 all:
-	@:;
+	# The ::= modifier overwrites the .TARGET variable in the node
+	# 'all', not in the global scope.  This can be seen with the -dv
+	# option, looking for "all:@ = overwritten".
+	: ${.TARGET} ${.TARGET::=overwritten}${.TARGET}