[OE-core] [PATCH 1/4] populate_sdk_ext.bbclass: use weak assignment for TOOLCHAINEXT_OUTPUTNAME

[Robert Yang]

The TOOLCHAINEXT_OUTPUTNAME is different from TOOLCHAIN_OUTPUTNAME, it
is used for eSDK only, so that it doesn't mix with SDK, use "?=" for it
so that other conf file can define it.

If we don't use "?=" here, then we need use forcevariable to redfine it:
TOOLCHAINEXT_OUTPUTNAME_forcevariable = "foo"

Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
 meta/classes/populate_sdk_ext.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/populate_sdk_ext.bbclass b/meta/classes/populate_sdk_ext.bbclass
index a0856d4..2c9def6 100644
--- a/meta/classes/populate_sdk_ext.bbclass
+++ b/meta/classes/populate_sdk_ext.bbclass
@@ -77,7 +77,7 @@ COREBASE_FILES ?= " \
 
 SDK_DIR_task-populate-sdk-ext = "${WORKDIR}/sdk-ext"
 B_task-populate-sdk-ext = "${SDK_DIR}"
-TOOLCHAINEXT_OUTPUTNAME = "${SDK_NAME}-toolchain-ext-${SDK_VERSION}"
+TOOLCHAINEXT_OUTPUTNAME ?= "${SDK_NAME}-toolchain-ext-${SDK_VERSION}"
 TOOLCHAIN_OUTPUTNAME_task-populate-sdk-ext = "${TOOLCHAINEXT_OUTPUTNAME}"
 
 SDK_EXT_TARGET_MANIFEST = "${SDK_DEPLOY}/${TOOLCHAINEXT_OUTPUTNAME}.target.manifest"
-- 
2.10.2