[OE-core] Schizophrenic package management

[Mark Hatle]

On 4/3/12 12:52 PM, Gary Thomas wrote:
> Why are both opkg-native and rpm-native needed to build images?
> When I asked this previously, I was told that rpm was used because
> it has superior dependency tracking.  Fair enough (I guess), but
> then why is opkg required if I build an image using
>     PACKAGE_CLASSES = "package_rpm"
>

rpm-native is used for internal dependency scanning.  The exact tool is 
"rpmdeps".  These dependencies may or may not be rolled up into package level 
dependencies by the packaging tool (which may be opkg, deb or rpm).  (see 
package.bbclass)

opkg-native is used for handling alternatives and similar during packaging and 
image creation.  So it's also needed.

I don't believe opkg, or rpm are needed on the target image though, unless of 
course you select one of them as the packaging type and you want target package 
management.

--Mark