classes/populate_sdk_ext: fail if SDK_ARCH != BUILD_ARCH

The extensible SDK relies upon uninative, and with the way that
uninative works, the build system architecture must be the same as the
SDK architecture or the extensible SDK won't be usable. At some point in
future hopefully we can remove this limitation, but until then it's
disingenuous to allow this to build, so add a check to ensure
SDK_ARCH == BUILD_ARCH and fail if it isn't.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/meta/classes/populate_sdk_ext.bbclass b/meta/classes/populate_sdk_ext.bbclass
index 736f17f489..dc052612c7 100644
--- a/meta/classes/populate_sdk_ext.bbclass
+++ b/meta/classes/populate_sdk_ext.bbclass
@@ -261,6 +261,11 @@ SDK_POST_INSTALL_COMMAND_task-populate-sdk-ext = "${sdk_ext_postinst}"
 SDK_POSTPROCESS_COMMAND_prepend_task-populate-sdk-ext = "copy_buildsystem; install_tools; "
 
 fakeroot python do_populate_sdk_ext() {
+    # FIXME hopefully we can remove this restriction at some point, but uninative
+    # currently forces this upon us
+    if d.getVar('SDK_ARCH', True) != d.getVar('BUILD_ARCH', True):
+        bb.fatal('The extensible SDK can currently only be built for the same architecture as the machine being built on - SDK_ARCH is set to %s (likely via setting SDKMACHINE) which is different from the architecture of the build machine (%s). Unable to continue.' % (d.getVar('SDK_ARCH', True), d.getVar('BUILD_ARCH', True)))
+
     bb.build.exec_func("do_populate_sdk", d)
 }