[OE-core] "IMAGE_INSTALL_append" versus "IMAGE_INSTALL +="?

[Robert P. J. Day]

  the current yocto dev manual contains the following:

===== start

"4.3.4.1. Adding Packages

The simplest way to add extra packages to all images is by using the
IMAGE_INSTALL variable with the _append operator:

     IMAGE_INSTALL_append = " strace"


Use of the syntax is important. Specifically, the space between the
quote and the package name, which is strace in this example. This
space is required since the _append operator does not add the space.

Furthermore, you must use _append instead of the += operator if you
want to avoid ordering issues."

===== end

  but oe-core occasionally uses the form discouraged above, as in the
case of core-image-minimal-mtdutils.bb:

  IMAGE_INSTALL += "mtd-utils"

perhaps i'm misreading something, but it's definitely confusing to
read that section in the manual, then find examples like the above in
oe-core.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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