[OE-core] [PATCH] kernel.bbclass: Allow ${S} to be overridden

[Paul Barker]

For kernel recipes which fetch sources from an archive instead of git, it's
necessary to point ${S} at the extracted sources. In kernel.bbclass there is
already logic in base_do_unpack_append() to link ${KERNEL_STAGING_DIR} to ${S}
if these aren't the same, so we just need to be able to override ${S}.

Signed-off-by: Paul Barker <paul at paulbarker.me.uk>
---
 meta/classes/kernel.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 25a153c..a7d467b 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -3,7 +3,7 @@ inherit linux-kernel-base kernel-module-split
 PROVIDES += "virtual/kernel"
 DEPENDS += "virtual/${TARGET_PREFIX}binutils virtual/${TARGET_PREFIX}gcc kmod-native depmodwrapper-cross bc-native lzop-native"
 
-S = "${STAGING_KERNEL_DIR}"
+S ?= "${STAGING_KERNEL_DIR}"
 B = "${WORKDIR}/build"
 KBUILD_OUTPUT = "${B}"
 OE_TERMINAL_EXPORTS += "KBUILD_OUTPUT"
-- 
2.1.4