ccache: allow CCACHE_DIR to be overriden

Use weaker assignment for CCACHE_DIR to allow users to override it
if desired.

Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

diff --git a/meta/classes/ccache.bbclass b/meta/classes/ccache.bbclass
index cd06a4bfdc8bf182ef0c0ce0f669562e4318f027..ca3ca43164648f36ba70f8a80652b2fe74bc85d7 100644 (file)
--- a/meta/classes/ccache.bbclass
+++ b/meta/classes/ccache.bbclass
@@ -1,5 +1,5 @@
 CCACHE = "${@bb.which(d.getVar('PATH', True), 'ccache') and 'ccache '}"
-export CCACHE_DIR = "${TMPDIR}/ccache/${MULTIMACH_HOST_SYS}/${PN}"
+export CCACHE_DIR ?= "${TMPDIR}/ccache/${MULTIMACH_HOST_SYS}/${PN}"
 CCACHE_DISABLE[unexport] = "1"
 
 do_configure[dirs] =+ "${CCACHE_DIR}"