[PATCH] sstate: Add a rule for target sysroot requirements from cross dependencies

[Richard Purdie <richard.purdie@linuxfoundation.org>]

For example gcc-cross depends on linux-libc-headers and needs it to be present
to build/work correctly.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index 470e0ee..b8a766b 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -663,6 +663,10 @@ def setscene_depvalid(task, taskdependees, notneeded, d):
         # Native/Cross populate_sysroot need their dependencies
         if isNativeCross(taskdependees[task][0]) and isNativeCross(taskdependees[dep][0]) and taskdependees[task][1] == 'do_populate_sysroot' and taskdependees[dep][1] == 'do_populate_sysroot':
             return False
+        # Target populate_sysroot depended on by cross tools need to be installed
+        if taskdependees[task][1] == 'do_populate_sysroot' and taskdependees[dep][1] == 'do_populate_sysroot' and isNativeCross(taskdependees[dep][0]):
+            return False
+
         # Target populate_sysroot do not need their dependencies
         if taskdependees[task][1] == 'do_populate_sysroot' and taskdependees[dep][1] == 'do_populate_sysroot':
             continue