[Buildroot] [PATCH v5 1/3] pkg-cmake: allow to build package in a subdirectory

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Tue Mar 10 21:54:19 UTC 2015

Dear Arnout Vandecappelle,

On Tue, 10 Mar 2015 22:43:10 +0100, Arnout Vandecappelle wrote:

>  I'm all for building in a subirectory by default and only do it directly in the
> tree when necessary.
>  And in fact, I would not even introduce the _REQUIRES_IN_SOURCE_BUILD variable
> until it is proven to be necessary. BTW, Thomas, did you introduce something
> like that in your out-of-source-build branch?

Yes, I did have a flag that allows a package to say "I support
out-of-tree build". It defaulted to "NO" in generic-package, and to
"YES" in autotools-package and cmake-package, but can be overridden by
individual packages. For example, 'linux' can support out of tree build
even though it's a generic-package (well, now a kconfig-package), or an
autotools package may not support out of tree due to stupidities done
by the upstream developer.

However, this branch is now very old, and was far from being ready.

I really would like to put the smallest amount of work on Gwenhael
shoulders: I don't want to ask him, as a prerequisite of getting
gnuradio merged, to do some major surgery work deep in our package
infrastructure. So can we settle on a temporary solution that works for
gnuradio and is acceptable, and implement the grand plan of doing full
out of tree build at some later point?


Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering

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