On Fri, Mar 23, 2012 at 01:14:24AM +0000, Richard Purdie wrote: > On Thu, 2012-03-22 at 19:53 -0400, Denys Dmytriyenko wrote: > > On Thu, Mar 22, 2012 at 11:26:24PM +0000, Richard Purdie wrote: > > > On Fri, 2012-03-09 at 14:39 -0700, Tom Rini wrote: > > > > Hey all, > > > > > > > > Over in meta-ti I kicked off a discussion > > > > (https://lists.yoctoproject.org/pipermail/meta-ti/2012-March/000779.html) > > > > about if we should be using '?=' or '+=' with IMAGE_FSTYPES in the > > > > machine conf files. This has been discussed a little bit before > > > > (http://thread.gmane.org/gmane.comp.handhelds.openembedded.core/2060/focus=2061). > > > > The problem is we have the following and I believe ultimately > > > > conflicting use cases: > > > > > > I've been under the impression that we decided upon: > > > > > > > - The machine needs to say 'I need or support the following formats' > > > > > > so the machine starts and sets: > > > > > > IMAGE_FSTYPES = "xxxx" > > > > > > > - The distro needs to say 'I always want format X' > > > > > > so the distro can do: > > > > > > IMAGE_FSTYPES += " yyy" > > > > > > > - The user needs to say 'I know best, give me only format X' > > > > > > So the user can do: > > > > > > IMAGE_FSTYPES = "X" > > > > Since local.conf gets parsed before machine.conf and distro.conf, the user > > needs to do this override: > > > > IMAGE_FSTYPES_local = "X" > > > > Otherwise machine.conf will always overwrite it with "xxxx" with its > > unconditional assignment. > > Right, I'd forgotten that little detail :/. > > It actually makes me wonder if our include order is the right one but > now isn't the time to try changing that. > > I agree the neatest way to change it is probably something like > MACHINE_FSTYPES. I do worry a lot about backwards compatibility though > and I'd also point out where we're at in the release cycle (bug fix > only).
Well, one problem that would make this a bugfix is that no one does what you say we agreed on today. oe-core has qemu.inc using ?=, meta-intel is using += and meta-ti is mixed (which is what got this started). -- Tom
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