[OE-core] [PATCH] autotools: add default for CACHED_CONFIGUREVARS

[Ross Burton]

Ensure that this variable has a default value so that we don't get debug
messages that the variable couldn't be expanded.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/classes/autotools.bbclass | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index 22880cc..c92ca78 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -77,6 +77,8 @@ CONFIGUREOPTS = " --build=${BUILD_SYS} \
 		  ${@append_libtool_sysroot(d)}"
 CONFIGUREOPT_DEPTRACK ?= "--disable-dependency-tracking"
 
+CACHED_CONFIGUREVARS ?= ""
+
 AUTOTOOLS_SCRIPT_PATH ?= "${S}"
 CONFIGURE_SCRIPT ?= "${AUTOTOOLS_SCRIPT_PATH}/configure"
 
-- 
2.8.0.rc3