Re: [libvirt PATCH] nss: Use shared_library() for nss_libvirt_lib

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On Mon, Dec 13, 2021 at 12:07:36PM +0100, Michal Prívozník wrote:
> On 12/11/21 01:27, Andrea Bolognani wrote:
> > shared_module() is intended for shared objects that are
> > loaded at runtime using dlopen() whereas NSS plugins need to
> > be full-fledged shared libraries with, among other things, a
> > proper SONAME.
> > 
> > Meson seems to have become more strict about this recently,
> > because libnss_libvirt.so.2 gets a SONAME when I build it with
> > Meson 0.59.4 on Fedora 34 but doesn't when I use Meson 0.60.2
> > on Debian testing instead.
> > 
> > Either way, shared_library() was always the right function
> > to use for NSS plugins.
> > 
> > Fixes: 36780c931900555706fd6db9fc2ce2b4cabf9045
> > Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
> > ---
> >  tools/nss/meson.build | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/tools/nss/meson.build b/tools/nss/meson.build
> > index 198936f3d4..f77309ebca 100644
> > --- a/tools/nss/meson.build
> > +++ b/tools/nss/meson.build
> > @@ -59,7 +59,7 @@ nss_libvirt_guest_syms = '@0@@1@'.format(
> >    meson.current_source_dir() / nss_guest_sym_file,
> >  )
> >  
> > -nss_libvirt_lib = shared_module(
> > +nss_libvirt_lib = shared_library(
> >    'nss_libvirt',
> >    name_prefix: nss_prefix,
> >    name_suffix: 'so.@0@'.format(nss_so_ver),
> 
> I'm unable to see any difference on rawhide with
> meson-0.60.2-1.fc36.noarch but libvirt_guest is built with
> shared_library() so I guess it works.

I did see a note in the glibc info pages that obliquely references
the fact that NSS modules are supposed to be built as "normal"
libraries, despite fact that they're dlopened. So this does seem
logical as a fix

> Reviewed-by: Michal Privoznik <mprivozn@xxxxxxxxxx>

Regards,
Daniel
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