[OE-core] [PATCH V2 1/4] bitbake.conf: add VOLATILE_LOG_DIR variable

[Chen Qi]

The default value is "yes" which results in the /var/log being a link
pointing to /var/volatile/log which is on tmpfs.

The user could override this value to "no" which causes /var/log to be
a directory on persistent storage.

[YOCTO #6132]

Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
---
 meta/conf/bitbake.conf | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 1472e8f..794f422 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -83,6 +83,9 @@ USRBINPATH_class-nativesdk = "/usr/bin"
 # Root home directory
 ROOT_HOME ??= "/home/root"
 
+# If set to "yes", /var/log links to /var/volatile/log; otherwise, /var/log is on persistent storage.
+VOLATILE_LOG_DIR ?= "yes"
+
 ##################################################################
 # Architecture-dependent build variables.
 ##################################################################
-- 
1.9.1