ccache: Separate out into its own class

Currently, ccache is used if it is present. When building from scratch it gives
no performance improvement and creates a ton of empty directories even when its
not in use.

This change moves ccache support to a bbclass file which the user can choose to
enable. This should make builds more determinstic and make it easier/clearer
to the end user when its being used and when it is not.

(From OE-Core rev: 2acf8da4f13c175ea818b9514677b7059de1e3e2)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 79685f7e7d..9219170a30 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -271,7 +271,7 @@ python base_eventhandler() {
 }
 
 addtask configure after do_patch
-do_configure[dirs] = "${CCACHE_DIR} ${S} ${B}"
+do_configure[dirs] = "${S} ${B}"
 do_configure[deptask] = "do_populate_sysroot"
 base_do_configure() {
         :