用于链接的命令：
**libtool --tag=CC --mode=link gcc -I/usr/include/libxml2 -I/home/ovsdpdk/rpmbuild/BUILD/openvswitch-2.4.0.1/openvswitch-2.4.0/include/ -I/home/ovsdpdk/rpmbuild/BUILD/openvswitch-2.4.0.1/openvswitch-2.4.0/lib/ -O3 -lxml2 -lnetconf -lopenvswitch -lovsdb -lpthread -lcrypto -lssl -lrt -laio -avoid-version -module -shared -export-dynamic --mode=link -o ietf-interfaces.la .obj/ietf-interfaces.lo .obj/ovs_mediation.lo -rpath /usr/local/lib**
错误：
libtool: link: gcc -shared -fPIC -DPIC .obj/.libs/ietf-interfaces.o .obj/.libs/ovs_mediation.o -lxml2 -lnetconf -lopenvswitch -lovsdb -lpthread -lcrypto -lssl -lrt -laio -O3 -Wl,-soname -Wl,ietf-interfaces.so -o .libs/ietf-interfaces.so
/usr/bin/ld: /usr/local/lib/libopenvswitch.a(ovsdb-idl.o): relocation R_X86_64_TPOFF32 against `var.7533' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libopenvswitch.a: could not read symbols: Bad value
collect2: error: ld returned 1 exit status