[src/trunk]: src/usr.bin/make/unit-tests tests/make: demonstrate recursive va...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/071653d40af3
branches:  trunk
changeset: 359877:071653d40af3
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Jan 29 10:09:37 2022 +0000

description:
tests/make: demonstrate recursive variable in target

diffstat:

 usr.bin/make/unit-tests/var-recursive.exp |   4 ++++
 usr.bin/make/unit-tests/var-recursive.mk  |  16 ++++++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diffs (46 lines):

diff -r 6f816710a11a -r 071653d40af3 usr.bin/make/unit-tests/var-recursive.exp
--- a/usr.bin/make/unit-tests/var-recursive.exp Sat Jan 29 09:38:26 2022 +0000
+++ b/usr.bin/make/unit-tests/var-recursive.exp Sat Jan 29 10:09:37 2022 +0000
@@ -12,4 +12,8 @@
        in var-recursive.mk:43
 
 make: stopped in unit-tests
+: OK
+Variable VAR is recursive.
+
+make: stopped in unit-tests
 exit status 0
diff -r 6f816710a11a -r 071653d40af3 usr.bin/make/unit-tests/var-recursive.mk
--- a/usr.bin/make/unit-tests/var-recursive.mk  Sat Jan 29 09:38:26 2022 +0000
+++ b/usr.bin/make/unit-tests/var-recursive.mk  Sat Jan 29 10:09:37 2022 +0000
@@ -1,9 +1,9 @@
-# $NetBSD: var-recursive.mk,v 1.2 2020/10/31 13:45:00 rillig Exp $
+# $NetBSD: var-recursive.mk,v 1.3 2022/01/29 10:09:37 rillig Exp $
 #
 # Tests for variable expressions that refer to themselves and thus
 # cannot be evaluated.
 
-TESTS= direct indirect conditional short
+TESTS= direct indirect conditional short target
 
 # Since make exits immediately when it detects a recursive expression,
 # the actual tests are run in sub-makes.
@@ -42,6 +42,18 @@
 V=     $V
 .  info $V
 
+.elif ${TEST} == target
+
+# If a recursive variable is accessed in a command of a target, the makefiles
+# are not parsed anymore, so there is no location information from the
+# .includes and .for directives.  TODO: In such a case, use the target
+# definition to provide at least a hint to the location.
+VAR=   ${VAR}
+target:
+       : OK
+       : ${VAR}
+       : OK
+
 .else
 .  error Unknown test "${TEST}"
 .endif