[OE-core] Specifying 32 bit dependency for 64 bit software

[Richard Purdie]

On Mon, 2014-11-03 at 17:29 +0000, Laszlo Papp wrote:
> we have a tool that we run during our make run, but this tool is
> hard-coded for 32 bit. It depends on software like ncurses. I could
> add ncurses-native in an ideal world; no problem.
> 
> The problem is that my host environment is 64 bit currently and it is
> not possible to migrate the whole environment to 32 bit. I am happy to
> explain the details if needed, but I would love you to trust me about
> that. =)
> 
> So, is it possible to say more than just DEPENDS = ncurses-native,
> something like DEPENDS = ncurses-native:x86 or something?

How much of a 32 bit system do you have? Do you at least have a 32 bit
capable compiler and C libraries?

If so, you could use our general class extension mechanism
(BBCLASSEXTEND) to allow 32 bit variants of the native recipes, e.g. a
"native32" form.

Alternatively, a more easier approach would be to build a target like
buildtools-tarball with SDKMACHINE="i686" and then install that onto the
system you're building on.

Cheers,

Richard