[libvirt] [PATCH] Fix link errors in tools/nss and tests

[Michal Privoznik]

On 08/08/2018 07:00 PM, Jim Fehlig wrote:
> While local builds succeed fine, a build worker building in a chroot
> environment is encountering errors when linking some items in tools/nss
> and tests, e.g.
> 
> [  469s] libtool: link: gcc -shared  -fPIC -DPIC  -Wl,--whole-archive nss/.libs/libnss_libvirt_impl.a -Wl,--no-whole-archive  -lpthread -lutil -ltirpc  -fstack-protector-strong -grecord-gcc-switches -O2 -fstack-protector-strong -g -Wl,--version-script=./nss/libvirt_nss.syms -Wl,-z -Wl,relro -Wl,-z -Wl,now -Wl,--no-copy-dt-needed-entries -Wl,-z -Wl,defs -grecord-gcc-switches -O2 -fstack-protector-strong -g   -pthread -Wl,-soname -Wl,libnss_libvirt.so.2 -o nss/.libs/libnss_libvirt.so.2
> [  469s] nss/.libs/libnss_libvirt_impl.a(libvirt_nss_la-virjsoncompat.o): In function `virJSONJanssonOnce':
> [  469s] /home/abuild/rpmbuild/BUILD/libvirt-4.6.0/src/util/virjsoncompat.c:63: undefined reference to `dlopen'
> [  469s] /home/abuild/rpmbuild/BUILD/libvirt-4.6.0/src/util/virjsoncompat.c:79: undefined reference to `dlsym'
> ...
> 
> A similar problem was fixed in commit b018ada3 and inspires this fix.
> 
> Signed-off-by: Jim Fehlig <jfehlig at suse.com>
> ---
>  tools/Makefile.am | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/Makefile.am b/tools/Makefile.am
> index 1452d984a0..26c887649e 100644
> --- a/tools/Makefile.am
> +++ b/tools/Makefile.am
> @@ -527,7 +527,8 @@ nss_libnss_libvirt_impl_la_CFLAGS = \
>  
>  nss_libnss_libvirt_impl_la_LIBADD = \
>  	../gnulib/lib/libgnu.la \
> -	../src/libvirt-nss.la
> +	../src/libvirt-nss.la \
> +	$(DLOPEN_LIBS)
>  
>  nss_libnss_libvirt_la_SOURCES =
>  nss_libnss_libvirt_la_LDFLAGS = \
> @@ -554,7 +555,8 @@ nss_libnss_libvirt_guest_impl_la_CFLAGS = \
>  
>  nss_libnss_libvirt_guest_impl_la_LIBADD = \
>  	../gnulib/lib/libgnu.la \
> -	../src/libvirt-nss.la
> +	../src/libvirt-nss.la \
> +	$(DLOPEN_LIBS)
>  
>  nss_libnss_libvirt_guest_la_SOURCES =
>  nss_libnss_libvirt_guest_la_LDFLAGS = \
> 

While I agree that we need to put DLOPEN_LIBS somewhere shouldn't be
that the lib that compiles virjsoncompat.c in? I mean, that is the
source of the dependency and therefore anything linking with it will
need similar treatment. Something among these lines (quickly written and
untested patch):


diff --git i/src/Makefile.am w/src/Makefile.am
index a4f213480e..51c134f08e 100644
--- i/src/Makefile.am
+++ w/src/Makefile.am
@@ -744,6 +744,7 @@ libvirt_setuid_rpc_client_la_LDFLAGS = \
                $(AM_LDFLAGS) \
                $(LIBXML_LIBS) \
                $(SECDRIVER_LIBS) \
+               $(DLOPEN_LIBS) \
                $(NULL)
 libvirt_setuid_rpc_client_la_CFLAGS = \
                -DLIBVIRT_SETUID_RPC_CLIENT \
@@ -1000,6 +1001,7 @@ libvirt_nss_la_CFLAGS = \
                $(NULL)
 libvirt_nss_la_LDFLAGS = \
                $(AM_LDFLAGS) \
+               $(DLOPEN_LIBS) \
                $(NULL)
 endif WITH_NSS

diff --git i/src/util/Makefile.inc.am w/src/util/Makefile.inc.am
index 8ef9ee1dfa..c5c50f1844 100644
--- i/src/util/Makefile.inc.am
+++ w/src/util/Makefile.inc.am
@@ -278,6 +278,7 @@ libvirt_util_la_LIBADD = \
        $(NUMACTL_LIBS) \
        $(ACL_LIBS) \
        $(GNUTLS_LIBS) \
+       $(DLOPEN_LIBS) \
        $(NULL)



Michal