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Re: [libvirt] libvirt-2.0.0 build error (hidden symbol libvirt_event_poll_update_handle_semaphore)



Hi, Daniel P. Berrange:
   my initial code can be built succssfully.  
   now i back port that patch to src/qemu/qemu_driver.c and src/qemu/qemu_driver.h ,  also built successfully.

thanks very much.





At 2017-06-27 17:55:42, "Daniel P. Berrange" <berrange redhat com> wrote: >On Tue, Jun 27, 2017 at 05:34:59PM +0800, longguang.yue wrote: >> Hi, all: >> i back port a patch which makes qemu depends on util directory. >> so i correct its dependency by applying a patch. but another error occur. >> the patch is http://libvirt.org/git/?p=libvirt.git;a=commit;h=57b5e27d3d74f8dbb77ac909b405d99d555eca46 > >That's wrong - qemu (and every driver in libvirt) has *always* depended >on the util directory - nothing changed in that respect in this patch. >The patch adds a new method in the util code, and exports that method >to drivers in the normal manner. > >> the patch fix dependency : >> --- libvirt-2.0.0/src/Makefile.am 2016-06-27 22:12:20.523191076 +0800 >> +++ libvirt-2.0.0-ok/src/Makefile.am 2017-06-22 12:25:17.512000000 +0800 >> @@ -1362,6 +1362,7 @@ >> -I$(srcdir)/access \ >> -I$(srcdir)/conf \ >> -I$(srcdir)/secret \ >> + -I$(srcdir)/util \ >> $(AM_CFLAGS) >> libvirt_driver_qemu_impl_la_LDFLAGS = $(AM_LDFLAGS) >> libvirt_driver_qemu_impl_la_LIBADD = $(CAPNG_LIBS) \ >> @@ -1369,6 +1370,7 @@ >> $(LIBNL_LIBS) \ >> $(LIBXML_LIBS) \ >> libvirt_secret.la \ >> + libvirt_util.la \ >> $(NULL) >> libvirt_driver_qemu_impl_la_SOURCES = $(QEMU_DRIVER_SOURCES) > >This is just wrong. Any symbols that QEMU uses from the libvirt_util.la >library are already linked into libvirtd and exported to the QEMU driver. >Linking QEMU to libvirt_util.la results in 2 copies the same code being >in-process which is broken. > >> CCLD qemucapsprobe >> /bin/ld: .libs/qemucapsprobe: hidden symbol `libvirt_event_poll_update_handle_semaphore' in ../src/libvirt_probes.o is referenced by DSO >> /bin/ld: final link failed: Bad value >> collect2: error: ld returned 1 exit status > >This looks unrelated to the patch you quote above. The patch doesn't >change qemucapsprobe, nor reference that hidden symbol. So I think >this is a pre-existing problem you have with your build and/or code >tree. > > >Regards, >Daniel >-- >|: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| >|: https://libvirt.org -o- https://fstop138.berrange.com :| >|: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| > >-- >libvir-list mailing list >libvir-list redhat com >https://www.redhat.com/mailman/listinfo/libvir-list


 


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