Re: [yocto][meta-openembedded] How to properly build a lib package

[Mikko Rapeli <mikko.rapeli@linaro.org>]

Hi,

On Wed, Aug 07, 2024 at 10:47:57AM +0200, Yann CARDAILLAC via lists.yoctoproject.org wrote:
> Hi all,
> 
> I'm working on upgrading different yocto BSPs to scarthgap, I'm having an
> error that I haven't seen. It's the one described here on stack overflow by
> someone else:
> 
> https://stackoverflow.com/questions/64984897/yocto-package-requires-shared-library-but-no-providers-found-in-rdepends
> 
> I have a very simple C library package that provides a shared library.
> 
> My package is looking very close to:
> meta-openembedded/meta-oe/recipes-extended/p7zip/p7zip_16.02.bb
> <https://github.com/openembedded/meta-openembedded/blob/master/meta-oe/recipes-extended/p7zip/p7zip_16.02.bb>
> 
> I don't really understand why we need to add the lib7z.so()(64bit)? Is
> there a "proper" way of avoiding that as it's not so common in other libs?
> 
> I'm also not comfortable adding :
> INSANE_SKIP:${PN} += "dev-so"
> 
> If any, can you point me to a simple library build that doesn't require the
> (64bit) that I don't really understand nor the INSANE_SKIP ? To sum up my
> need is to have a simple recipe for a shared library.

Please set soname correctly, see
https://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html

Shared libraries without soname are bad and this test correctly finds them.

Cheers,

-Mikko