angstrom.bbclass : a utility bbclass for angstrom, currently implements

a recipe blacklister

diff --git a/classes/angstrom.bbclass b/classes/angstrom.bbclass
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+# anonymous support class for angstrom
+# 
+# Features:
+#
+# * blacklist handling, set ANGSTROM_BLACKLIST_pn-blah = "message"
+#
+
+python () {
+    import bb
+
+    blacklist = bb.data.getVar("ANGSTROM_BLACKLIST", d, 1)
+    pkgnm = bb.data.getVar("PN", d, 1)
+
+    if blacklist:
+       bb.note("Angstrom DOES NOT support %s because %s" % (pkgnm, blacklist))
+        raise bb.parse.SkipPackage("Angstrom DOES NOT support %s because %s" % (pkgnm, blacklist))
+
+}
+