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[Qemu-trivial] [PATCH] configure: Support empty target list (--target-li
From: |
Stefan Weil |
Subject: |
[Qemu-trivial] [PATCH] configure: Support empty target list (--target-list=) |
Date: |
Wed, 26 Sep 2012 22:04:38 +0200 |
Specifying an empty target list with --target-list= is shorter
than specifying --disable-user --disable-system.
Both variants should give the same result: no targets at all.
This modification implements that feature.
It uses a trick which works with POSIX compliant shells to test whether
target_list is undefined (=> default targets) or empty (=> no targets).
Signed-off-by: Stefan Weil <address@hidden>
---
configure | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/configure b/configure
index 8f99b7b..769ec1a 100755
--- a/configure
+++ b/configure
@@ -125,7 +125,8 @@ cc_i386=i386-pc-linux-gnu-gcc
libs_qga=""
debug_info="yes"
-target_list=""
+# Don't accept a target_list environment variable.
+unset target_list
# Default value for a variable defining feature "foo".
# * foo="no" feature will only be used if --enable-foo arg is given
@@ -1281,7 +1282,7 @@ if ! "$python" -c 'import sys; sys.exit(sys.version_info
< (2,4) or sys.version_
exit 1
fi
-if test -z "$target_list" ; then
+if test -z "${target_list+xxx}" ; then
target_list="$default_target_list"
else
target_list=`echo "$target_list" | sed -e 's/,/ /g'`
--
1.7.10
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