bitbake.conf: use TUNE_PKGARCH instead of TARGET_ARCH in SDK_NAME

* also use weak assignment for SDK_NAME_PREFIX as suggested by khem
* TUNE_PKGARCH is not 100% right too, because such SDK image usually has few
  machine specific packages included (e.g. base-files, securetty, opkg configs)
  but those are not important for SDK users so it's better to have one SDK for
  whole e.g. armv7a-vfp-neon then 6 SDK for each machine which would work the
  same.
  You can see diff between crespo and om-gta04 SDK here:
  http://build.shr-project.org/shr-core/sdk/oecore-i686-armv7a-vfp-neon-toolchain-efl-crespo-om-gta04.diff

(From OE-Core rev: 5a1f172d35be610688842a8a9a84f24edb9aeb51)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 56e3e4de45..91fe070718 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -366,8 +366,8 @@ PKGDATA_DIR = "${TMPDIR}/pkgdata/${MULTIMACH_TARGET_SYS}"
 # SDK variables, 
 ##################################################################
 
-SDK_NAME_PREFIX = "oecore"
-SDK_NAME = "${SDK_NAME_PREFIX}-${SDK_ARCH}-${TARGET_ARCH}"
+SDK_NAME_PREFIX ?= "oecore"
+SDK_NAME = "${SDK_NAME_PREFIX}-${SDK_ARCH}-${TUNE_PKGARCH}"
 SDKPATH = "/usr/local/${SDK_NAME_PREFIX}-${SDK_ARCH}"
 SDKPATHNATIVE = "${SDKPATH}/sysroots/${SDK_SYS}"