[PATCH] crossvars.bbclass: use d.appendVar instead of d.setVar for SDK_TOOLCHAIN variable

[Srinuvasan Arjunan <srinuvasan_a@mentor.com>]

From: Srinuvasan A <srinuvasan.a@siemens.com>

In downstream layer we may override the sdk_toolchain, but this not works as
expected in latest ISAR, the reason behind this as they moved toolchain
selection into python Anonymous function.

Anonymous Python functions always run at the end of parsing, regardless of where they are defined
even when we do override in our recipe, always wins the Anonymous Python
functions variable settings, hence change to d.appendVar instead of
d.setVar in sdk toolchain selection, so downstream layer they can modify the
SDK_TOOLCHAIN list if needed (append/remove).

Signed-off-by: Srinuvasan A <srinuvasan.a@siemens.com>
---
 meta/classes/crossvars.bbclass | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta/classes/crossvars.bbclass b/meta/classes/crossvars.bbclass
index 201d460..5a3edc4 100644
--- a/meta/classes/crossvars.bbclass
+++ b/meta/classes/crossvars.bbclass
@@ -17,7 +17,7 @@ python __anonymous() {
         sbuild_dep = "sbuild-chroot-target:do_build"
         buildchroot_dir = d.getVar('BUILDCHROOT_TARGET_DIR', False)
         buildchroot_dep = "buildchroot-target:do_build"
-        sdk_toolchain = "build-essential"
+        sdk_toolchain = " build-essential"
     else:
         d.setVar('BUILD_HOST_ARCH', d.getVar('HOST_ARCH'))
         schroot_dir = d.getVar('SCHROOT_HOST_DIR', False)
@@ -31,5 +31,5 @@ python __anonymous() {
     d.setVar('BUILDCHROOT_DEP', buildchroot_dep)
     if isar_can_build_compat(d):
         sdk_toolchain += " crossbuild-essential-" + d.getVar('COMPAT_DISTRO_ARCH')
-    d.setVar('SDK_TOOLCHAIN', sdk_toolchain)
+    d.appendVar('SDK_TOOLCHAIN', sdk_toolchain)
 }
-- 
2.34.1