base.bbclass: add support for commercial license check

This addresses [BUGID #410], require implict action by someone to enable
functionality that may have license implications.

By default this diables mp3 and mpeg decoding

Signed-off-by: Saul Wold <Saul.Wold@intel.com>

meta/classes/base.bbclass

@@ -466,6 +466,12 @@ python () {
     if license == "INVALID":
         bb.fatal('This recipe does not have the LICENSE field set (%s)' % pn)
 
+    commercial_license = bb.data.getVar('COMMERCIAL_LICENSE', d, 1)
+    import re
+    if commercial_license and re.search(pn, commercial_license):
+        bb.note("SKIPPING %s because it's Commerciallly Licensed" % pn)
+        raise bb.parse.SkipPackage("because it requires commercial license to ship product")
+
     # If we're building a target package we need to use fakeroot (pseudo)
     # in order to capture permissions, owners, groups and special files
     if not bb.data.inherits_class('native', d) and not bb.data.inherits_class('cross', d):

meta/conf/distro/poky.conf

@@ -123,6 +123,11 @@ GPLv3_HOSTTOOLS_WHITELIST = ""
 GPLv3_WHITELIST = "less gnome-common"
 GPLv3_LGPLv2_WHITELIST = "libassuan gnutls libtasn1 libidn" 
 
+# This is a list of packages that require a commercial license to ship
+# product. If shipped as part of an image these packages may have 
+# implications so they are disabled by default
+COMMERCIAL_LICENSE = "lame gst-fluendo-mp3 libmad mpeg2dec ffmpeg qmmp"
+
 require conf/distro/include/world-broken.inc
 require conf/distro/include/distro_tracking_fields.inc