bitbake.conf: Add SDK_PACKAGE_ARCHS

Add SDK_PACKAGE_ARCHS to avoid the sed operations we were previously doing
inside of the variouns populate_sdk functions and related items.

Also add documentation to populate_sdk to explain when the various functions
are expected to be doing.

Finally fix a bug in populate_sdk_rpm where the wrong value was being set,
noticed while working on this change.

(From OE-Core rev: 587c1d5bac71fa6faa65ee3a271391cbf931e8f7)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/meta/classes/populate_sdk.bbclass b/meta/classes/populate_sdk.bbclass
index 089ed9ab35..0f3591b9d5 100644
--- a/meta/classes/populate_sdk.bbclass
+++ b/meta/classes/populate_sdk.bbclass
@@ -22,6 +22,15 @@ fakeroot do_populate_sdk() {
         rm -rf ${SDK_OUTPUT}
         mkdir -p ${SDK_OUTPUT}
 
+        # populate_sdk_<image> is required to construct two images:
+        #  SDK_ARCH-nativesdk - contains the cross compiler and associated tooling
+        #  target - contains a target rootfs configured for the SDK usage
+        #
+        # the output of populate_sdk_<image> should end up in ${SDK_OUTPUT} it is made
+        # up of:
+        #  ${SDK_OUTPUT}/<sdk_arch-nativesdk pkgs>
+        #  ${SDK_OUTPUT}/${SDKTARGETSYSROOT}/<target pkgs>
+
         populate_sdk_${IMAGE_PKGTYPE}
 
         # Don't ship any libGL in the SDK