Re: [PATCH] Link libvirt_util.la with gnutls

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On Wed, Sep 20, 2017 at 11:35:14AM +0200, Martin Kletzander wrote:
> On Wed, Sep 20, 2017 at 09:41:24AM +0100, Daniel P. Berrange wrote:
> > The util/vircrypto.c file uses gnutls, so we must directly link
> > libvirt_util.la with gnutls to avoid errors on OS which do not
> > resolve symbols against indirectly linked libraries.
> > 
> > This fixes a build failure on Ubuntu Trusty
> > 
> >  CCLD     storagevolxml2argvtest
> > /usr/bin/ld: ../src/.libs/libvirt_util.a(libvirt_util_la-vircrypto.o): undefined reference to symbol 'gnutls_strerror@@GNUTLS_1_4'
> > 
> > //usr/lib/x86_64-linux-gnu/libgnutls.so.26: error adding symbols: DSO missing from command line
> > 
> 
> Thanks for fixing that.  Do you know how this can be changed?  Is it
> some setting for glibc or is it the way it is compiled?

It is behaviour of the "ld" linker

https://wiki.debian.org/ToolChain/DSOLinking

Debian/Ubuntu have --no-add-needed/--no-copy-dt-needed-entries enabled by
default in their linker builds, which IIUC, differs from what is the
default on Fedora/RHEL.

IIUC, it is the --no-copy-dt-needed-entries that caused this particular
build failure.

> 
> > Signed-off-by: Daniel P. Berrange <berrange@xxxxxxxxxx>
> > ---
> > 
> > Pushed as a build breaker fix
> > 
> > src/Makefile.am | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/src/Makefile.am b/src/Makefile.am
> > index c3c7a8f04..173fba1e6 100644
> > --- a/src/Makefile.am
> > +++ b/src/Makefile.am
> > @@ -1224,7 +1224,7 @@ libvirt_util_la_LIBADD = $(CAPNG_LIBS) $(YAJL_LIBS) $(LIBNL_LIBS) \
> > 		$(THREAD_LIBS) $(AUDIT_LIBS) $(DEVMAPPER_LIBS) \
> > 		$(LIB_CLOCK_GETTIME) $(DBUS_LIBS) $(WIN32_EXTRA_LIBS) $(LIBXML_LIBS) \
> > 		$(SECDRIVER_LIBS) $(NUMACTL_LIBS) $(ACL_LIBS) \
> > -		$(POLKIT_LIBS)
> > +		$(POLKIT_LIBS) $(GNUTLS_LIBS)


Regards,
Daniel
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