OESF Portables Forum

Everything Else => Zaurus - Everything Development => Distros, Development, and Model Specific Forums => Archived Forums => Open Embedded => Topic started by: lixiaosan on May 12, 2005, 11:16:05 pm

Title: What About The “virtual” Means？
Post by: lixiaosan on May 12, 2005, 11:16:05 pm

In local.conf ，we find word “virtual”。
for example:

ASSUME_PROVIDED = "virtual/${TARGET_PREFIX}gcc virtual/libc"

and  use "bitbake virtual/kernel“ to build a kernel。

what about these ”virtual“ mean？

Title: What About The “virtual” Means？
Post by: Mickeyl on May 13, 2005, 04:39:58 am

A virtual dependency is one that is fulfilled by more than one alternative provider.

Example: We have lots of kernels in OE for different models. All our kernels provide "virtual/kernel". Now external module packages don't need to know _what_ kernel they're building against, however they need that _a_ kernel has been built - hence they rely on 'virtual/kernel'.

This is like saying "I don't care about which kind of ice-cream, I just want ice-cream"