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

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

details:   https://anonhg.NetBSD.org/src/rev/eb5aae180a21
branches:  trunk
changeset: 937626:eb5aae180a21
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sat Aug 22 16:51:25 2020 +0000

description:
make(1): add test for deferred variable expansion in dependencies

diffstat:

 distrib/sets/lists/tests/mi         |   6 +++++-
 usr.bin/make/unit-tests/Makefile    |   3 ++-
 usr.bin/make/unit-tests/dep-var.exp |   2 ++
 usr.bin/make/unit-tests/dep-var.mk  |  33 +++++++++++++++++++++++++++++++++
 4 files changed, 42 insertions(+), 2 deletions(-)

diffs (80 lines):

diff -r 2c9ab1438f90 -r eb5aae180a21 distrib/sets/lists/tests/mi
--- a/distrib/sets/lists/tests/mi       Sat Aug 22 16:00:52 2020 +0000
+++ b/distrib/sets/lists/tests/mi       Sat Aug 22 16:51:25 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.898 2020/08/22 11:27:02 rillig Exp $
+# $NetBSD: mi,v 1.899 2020/08/22 16:51:25 rillig Exp $
 #
 # Note: don't delete entries from here - mark them as "obsolete" instead.
 #
@@ -4593,6 +4593,10 @@
 ./usr/tests/usr.bin/make/unit-tests/dep-double-colon.mk        tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/make/unit-tests/dep-exclam.exp     tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/make/unit-tests/dep-exclam.mk      tests-usr.bin-tests     compattestfile,atf
+./usr/tests/usr.bin/make/unit-tests/dep-none.exp       tests-usr.bin-tests     compattestfile,atf
+./usr/tests/usr.bin/make/unit-tests/dep-none.mk        tests-usr.bin-tests     compattestfile,atf
+./usr/tests/usr.bin/make/unit-tests/dep-var.exp        tests-usr.bin-tests     compattestfile,atf
+./usr/tests/usr.bin/make/unit-tests/dep-var.mk tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/make/unit-tests/dep-wildcards.exp  tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/make/unit-tests/dep-wildcards.mk   tests-usr.bin-tests     compattestfile,atf
 ./usr/tests/usr.bin/make/unit-tests/dep.exp    tests-usr.bin-tests     compattestfile,atf
diff -r 2c9ab1438f90 -r eb5aae180a21 usr.bin/make/unit-tests/Makefile
--- a/usr.bin/make/unit-tests/Makefile  Sat Aug 22 16:00:52 2020 +0000
+++ b/usr.bin/make/unit-tests/Makefile  Sat Aug 22 16:51:25 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.108 2020/08/22 15:25:50 sjg Exp $
+# $NetBSD: Makefile,v 1.109 2020/08/22 16:51:26 rillig Exp $
 #
 # Unit tests for make(1)
 #
@@ -66,6 +66,7 @@
 TESTS+=                dep-double-colon
 TESTS+=                dep-exclam
 TESTS+=                dep-none
+TESTS+=                dep-var
 TESTS+=                dep-wildcards
 TESTS+=                depsrc
 TESTS+=                depsrc-exec
diff -r 2c9ab1438f90 -r eb5aae180a21 usr.bin/make/unit-tests/dep-var.exp
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/usr.bin/make/unit-tests/dep-var.exp       Sat Aug 22 16:51:25 2020 +0000
@@ -0,0 +1,2 @@
+def2
+exit status 0
diff -r 2c9ab1438f90 -r eb5aae180a21 usr.bin/make/unit-tests/dep-var.mk
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/usr.bin/make/unit-tests/dep-var.mk        Sat Aug 22 16:51:25 2020 +0000
@@ -0,0 +1,33 @@
+# $NetBSD: dep-var.mk,v 1.1 2020/08/22 16:51:26 rillig Exp $
+#
+# Tests for variable references in dependency declarations.
+#
+# Uh oh, this feels so strange that probably nobody uses it. But it seems to
+# be the only way to reach the lower half of SuffExpandChildren.
+
+# XXX: The -dv log says:
+#      Var_Parse: ${UNDEF1} with VARE_UNDEFERR|VARE_WANTRES
+# but no error message is generated for this line.
+# The variable expression ${UNDEF1} simply expands to an empty string.
+all: ${UNDEF1}
+
+# Using a double dollar in order to circumvent immediate variable expansion
+# feels like unintended behavior.  At least the manual page says nothing at
+# all about defined or undefined variables in dependency lines.
+#
+# At the point where the expression ${DEF2} is expanded, the variable DEF2
+# is defined, so everything's fine.
+all: $${DEF2}
+
+# This variable is not defined at all.
+# XXX: The -dv log says:
+#      Var_Parse: ${UNDEF3} with VARE_UNDEFERR|VARE_WANTRES
+# but no error message is generated for this line, just like for UNDEF1.
+# The variable expression ${UNDEF3} simply expands to an empty string.
+all: $${UNDEF3}
+
+UNDEF1=        undef1
+DEF2=  def2
+
+undef1 def2:
+       @echo ${.TARGET}