[oe] [meta-oe][PATCH v2] libeigen: allow empty packages

[Martin Jansa]

On Wed, Oct 03, 2018 at 08:24:22AM +0200, Vyacheslav Yurkov wrote:
> libeigen is header-only library.
> All headers go into dev package, therefore the main package is empty.
> Dependency on the dev package doesn't work, so you have to allow
> empty package for build to succeed for recipes that depend on libeigen
> (e.g. ceres-solver). Otherwise an error occurs that empty packages
> are not allowed.

I still don't understand what the issue is, there is already
RDEPENDS_${PN}-dev = "" and similar for ${PN}-dbg.

Creating empty libeigen package to satisfy dependency from ceres-solver
doesn't really fix anything (just installs useless empty package on
target).

> Signed-off-by: Vyacheslav Yurkov <uvv.mail at gmail.com>
> ---
>  meta-oe/recipes-support/libeigen/libeigen_3.3.4.bb | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/meta-oe/recipes-support/libeigen/libeigen_3.3.4.bb b/meta-oe/recipes-support/libeigen/libeigen_3.3.4.bb
> index 31a42a9d6..a59320655 100644
> --- a/meta-oe/recipes-support/libeigen/libeigen_3.3.4.bb
> +++ b/meta-oe/recipes-support/libeigen/libeigen_3.3.4.bb
> @@ -18,3 +18,4 @@ FILES_${PN}-dev = "${includedir} ${datadir}/eigen3/cmake ${datadir}/cmake/Module
>  # ${PN} is empty so we need to tweak -dev and -dbg package dependencies
>  RDEPENDS_${PN}-dev = ""
>  RRECOMMENDS_${PN}-dbg = "${PN}-dev (= ${EXTENDPKGV})"
> +ALLOW_EMPTY_${PN} = "1"
> -- 
> 2.17.0
> 
> -- 
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-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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