1 files changed, 45 insertions, 3 deletions
diff --git a/contrib/bmake/unit-tests/directive-export-gmake.mk b/contrib/bmake/unit-tests/directive-export-gmake.mk
index d94cd9debf64..de79470bf305 100644
--- a/contrib/bmake/unit-tests/directive-export-gmake.mk
+++ b/contrib/bmake/unit-tests/directive-export-gmake.mk
@@ -1,4 +1,4 @@
-# $NetBSD: directive-export-gmake.mk,v 1.3 2020/11/17 20:16:44 rillig Exp $
+# $NetBSD: directive-export-gmake.mk,v 1.9 2023/12/17 09:44:00 rillig Exp $
 #
 # Tests for the export directive (without leading dot), as in GNU make.
 
@@ -60,5 +60,47 @@ export VAR=an ${UNDEF} variable
 .  error
 .endif
 
-all:
-	@:;
+
+# The body of the .for loop expands to 'export VAR=${:U1}', and the 'export'
+# directive is only recognized if the line does not contain a ':', to allow
+# 'export' to be a regular target.
+.for value in 1
+# XXX: The ':' in this line is inside an expression and should thus not be
+# interpreted as a dependency operator.
+# expect+1: Invalid line 'export VAR=${:U1}', expanded to 'export VAR=1'
+export VAR=${value}
+.endfor
+
+
+# The 'export' directive expands expressions, but the expressions must not
+# contain a ':', due to the overly strict parser.  The indirect expressions
+# may contain a ':', though.
+#
+# As a side effect, this test demonstrates that the 'export' directive exports
+# the environment variable immediately, other than the '.export' directive,
+# which defers that action if the variable value contains a '$'.
+INDIRECT_TZ=	${:UAmerica/Los_Angeles}
+export TZ=${INDIRECT_TZ}
+# expect+1: 16:00:00
+.info ${%T:L:localtime=86400}
+
+
+# The '=' must be present in the unexpanded line, it cannot be generated by
+# an expression.
+EQ=	=
+# expect+1: Variable/Value missing from "export"
+export EQ_VAR${EQ}eq-value
+.if ${:!env!:MEQ_VAR=*}
+.  error
+.endif
+
+
+# The variable name must be given directly, it is not expanded.  The name of
+# the exported variable thus starts with a '$', and that name may be filtered
+# out by the platform.
+INDIRECT_NAME=	I_NAME
+INDIRECT_VALUE=	indirect value
+export ${INDIRECT_NAME}=${INDIRECT_VALUE}
+.if ${:!env!:MI_NAME=*}
+.  error
+.endif