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[Automake-NG] [FYI] [ng] coverage: iteration variable in $(foreach ...)
From: |
Stefano Lattarini |
Subject: |
[Automake-NG] [FYI] [ng] coverage: iteration variable in $(foreach ...) is temporary |
Date: |
Tue, 24 Jul 2012 15:12:06 +0200 |
* t/spy-foreach.sh: New test. Check that, after a "$(foreach x,...)"
loop, the make variable $(x) is:
- restored to the original variable it had before the 'foreach'
loop, if it was already set; and
- is re-unset otherwise.
Signed-off-by: Stefano Lattarini <address@hidden>
---
t/spy-foreach.sh | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100755 t/spy-foreach.sh
diff --git a/t/spy-foreach.sh b/t/spy-foreach.sh
new file mode 100755
index 0000000..e71bd81
--- /dev/null
+++ b/t/spy-foreach.sh
@@ -0,0 +1,39 @@
+#! /bin/sh
+# Copyright (C) 2012 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Verify that iterating variable used in a $(foreach ...) builtin is
+# only temporary, and restored to its previous variable if it was already
+# set.
+
+am_create_testdir=empty
+. ./defs || exit 1
+
+cat > Makefile <<'END'
+$(foreach x,1 2,$(warning foo-$(x))$(eval y:=$$(x)))
+$(foreach u,oops ko,$(warning bar-$(u))$(eval v=$(u)))
+test:
+ test .'$(x)' = .
+ test .'$(origin x)' = .'undefined'
+ test .'$(y)' = .2
+ test .'$(v)' = .ko
+ test .'$(u)' = .ok
+ test .'$(origin u)' = .'command line'
+END
+
+x= y= u= v=; unset x y u v
+$MAKE test u=ok
+
+:
--
1.7.12.rc0
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