[src/trunk]: src/usr.bin/make/unit-tests make(1): add test for recursion dete...

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

details:   https://anonhg.NetBSD.org/src/rev/fb3e69f814d5
branches:  trunk
changeset: 1015745:fb3e69f814d5
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Oct 31 13:45:00 2020 +0000

description:
make(1): add test for recursion detection with short variable names

diffstat:

 usr.bin/make/unit-tests/var-recursive.exp |   3 +++
 usr.bin/make/unit-tests/var-recursive.mk  |  12 ++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diffs (41 lines):

diff -r 6c3adae5d40d -r fb3e69f814d5 usr.bin/make/unit-tests/var-recursive.exp
--- a/usr.bin/make/unit-tests/var-recursive.exp Sat Oct 31 13:28:22 2020 +0000
+++ b/usr.bin/make/unit-tests/var-recursive.exp Sat Oct 31 13:45:00 2020 +0000
@@ -6,4 +6,7 @@
 
 make: stopped in unit-tests
 make: "var-recursive.mk" line 35: ok
+Variable V is recursive.
+
+make: stopped in unit-tests
 exit status 0
diff -r 6c3adae5d40d -r fb3e69f814d5 usr.bin/make/unit-tests/var-recursive.mk
--- a/usr.bin/make/unit-tests/var-recursive.mk  Sat Oct 31 13:28:22 2020 +0000
+++ b/usr.bin/make/unit-tests/var-recursive.mk  Sat Oct 31 13:45:00 2020 +0000
@@ -1,9 +1,9 @@
-# $NetBSD: var-recursive.mk,v 1.1 2020/10/31 11:30:57 rillig Exp $
+# $NetBSD: var-recursive.mk,v 1.2 2020/10/31 13:45:00 rillig Exp $
 #
 # Tests for variable expressions that refer to themselves and thus
 # cannot be evaluated.
 
-TESTS= direct indirect conditional
+TESTS= direct indirect conditional short
 
 # Since make exits immediately when it detects a recursive expression,
 # the actual tests are run in sub-makes.
@@ -34,6 +34,14 @@
 CONDITIONAL=   ${1:?ok:${CONDITIONAL}}
 .  info ${CONDITIONAL}
 
+.elif ${TEST} == short
+
+# Short variable names can be expanded using the short-hand $V notation,
+# which takes a different code path in Var_Parse for parsing the variable
+# name.  Ensure that these are checked as well.
+V=     $V
+.  info $V
+
 .else
 .  error Unknown test "${TEST}"
 .endif