[Buildroot] Defining package env variables in external.mk

[Buildroot] Defining package env variables in external.mk

[Wolfgang Grandegger]

Hello,

I discovered that it's possible to define environment variable for 
certain packages in "external,mk":

   $ cd buildroot-my-external-tree
   $ cat external.mk
   ...
   UDISKS_CONF_OPTS += "--enable-fhs-media"

This works for UDISKS. Is it a legal simple way to set package variables 
for the mainline tree in the external tree?

Sorry for my ignorance.

Wolfgang

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Re: [Buildroot] Defining package env variables in external.mk

[Juan Carrano]

Hi Wolfgang,

This works because Make variables are lazily evaluated by default so
this sort of monkey-patching works.

Now, not being a BR dev myself I'd also like to know whether the devs
condone this sort of hack. I have used it myself too and helps to keep
down the number of modifications in the main tree and in the external.
The thing is that it can break if the original MK file changes too
much, but from what I see that is not so usual.

Regards,

Juan.
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