On 05/15/2012 11:46 PM, Manuel Bessler wrote:
Just a few minutes ago I was wondering if such a feature did exist...
I ran into a situation where I wanted to remove something from a .bbappend
that is added to a variable using VARIABLE_append = "this and that"
My understanding is that a _subtract is fraught with danger, there all
sorts of ordering implications.
For what you are trying to do in a .bbappend, can be done by using
oe_filter_out() from utils.bbclass, it has to be done in anonymous code.
VARIABLE := "${@oe_filter_out('xxx', '${VARIABLE}', d)}"
This might be what you want.
Sau!
Manuel
On Tue, May 15, 2012 at 3:01 PM, Peter Seebach
<[email protected]> wrote:
There's a few cases where something is a huge list of space-separated
things, and it is desireable to remove one. The example currently
afflicting me is DISTRO_FEATURES_LIBC_DEFAULT; I want to end up with
the distro features including all but one of the words in it.
It seems to me that a counterpart to _append would make sense. Here
is my basic idea:
FOO_subtract = "..."
means that, when you expand FOO:
1. Fully expand it.
2. Fully expand FOO_subtract.
3. Remove any words in FOO_subtract from FOO.
4. Yield the result.
The rationale is that the semantics of things where we're using _append
seem to be consistently of the form "this is a space-separated set",
and being able to remove things from a set would be Super Handy.
So I'm proposing the semantics for consideration, and if people like
them, I will go try to implement it in my Copious Free Time.
-s
--
Listen, get this. Nobody with a good compiler needs to be justified.
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