Re: [libgpiod][PATCH 1/1] dbus: manager: fix linker not finding libgpiod.so

[Börge Strümpfel <boerge.struempfel@xxxxxxxxx>]

Hi Bart,

thank you for your reply.

you are in fact correct and the LDADD is enough. There seems to be an
issue with the sdk I was using. After manually crosscompiling using a
different sdk, I no longer get the error that libgpiod.so can not be
found by the linker.

The sdk with which I got the error was generated using buildroot version
2024.01. However the error does not occur on the current buildroot
master version. Therefore you can ignore this patch.

Kind Regards,
Boerge

On Mon, Nov 4, 2024 at 10:39 AM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
>
> On Wed, Oct 30, 2024 at 5:49 PM Boerge Struempfel
> <boerge.struempfel@xxxxxxxxx> wrote:
> >
> > When crosscompiling, the linker isn't finding libpgiod.so while linking
> > the manager to libgpiod-glib.so.
> >
> > In order to fix this issue, we manually force the linker to look in
> > the corresponding folder for needed shared libraries, when building the
> > manager.
> >
> > Signed-off-by: Boerge Struempfel <boerge.struempfel@xxxxxxxxx>
> > ---
> >  dbus/manager/Makefile.am | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/dbus/manager/Makefile.am b/dbus/manager/Makefile.am
> > index d1cef8e..32c9e30 100644
> > --- a/dbus/manager/Makefile.am
> > +++ b/dbus/manager/Makefile.am
> > @@ -9,6 +9,7 @@ AM_CFLAGS += -DG_LOG_DOMAIN=\"gpio-manager\"
> >  AM_CFLAGS += $(PROFILING_CFLAGS)
> >  AM_LDFLAGS = $(GLIB_LIBS) $(GIO_LIBS) $(GIO_UNIX_LIBS) $(GUDEV_LIBS)
> >  AM_LDFLAGS += $(PROFILING_LDFLAGS)
> > +AM_LDFLAGS += -Wl,-rpath,$(top_builddir)/lib/.libs
> >  LDADD = $(top_builddir)/bindings/glib/libgpiod-glib.la
> >  LDADD += $(top_builddir)/dbus/lib/libgpiodbus.la
> >
> > --
> > 2.43.0
> >
> >
>
> Can you give me more info on your environment? I'm cross-compiling
> just fine and the:
>
> LDADD += $(top_builddir)/dbus/lib/libgpiodbus.la
>
> bit should be enough for linking.
>
> Bart