utils.bbclass: make FILESEXTRAPATHS colon delimited
Fixes [YOCTO 1102]
Path variables are typically : delimited. White space is allowed in paths, so
is not a good choice for separating paths. Currently utils.bbclass performs the
following:
extrapaths = (bb.data.getVar("FILESEXTRAPATHS", d, True) or "").split()
This splits FILESEXTRAPATHS on whitespace. It later splits overrides on : and
reassembles them all together as : delimited.
There is only one user of FILESEXTRAPATHS in oe-core (qt4-tools-native, which
uses : anyway) and none in oe.
Change the split() in utils.bbclass to split on : instead of whitespace. When
splitting on a defined string (":") we must be careful to handle the empty
string case which returns [''] instead of [].
Tested building qt4-tools-native and core-image-minimal for surgarbay from
meta-intel with a couple extra layers with FILESEXTRAPATHS modifications added.
Signed-off-by: Darren Hart <dvhart@linux.intel.com> Cc: Phil Blundell <pb@pbcl.net> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
