The function nwfilterBindingCreateXML() is failing to compile due to a conditional branch which leads to a undefined 'obj' variable. So 'obj' must have a initial value to avoid compilation errors. See the problem: CC nwfilter/libvirt_driver_nwfilter_impl_la-nwfilter_driver.lo nwfilter/nwfilter_driver.c:752:9: error: variable 'obj' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] if (virNWFilterBindingCreateXMLEnsureACL(conn, def) < 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ nwfilter/nwfilter_driver.c:779:10: note: uninitialized use occurs here if (!obj) ^~~ nwfilter/nwfilter_driver.c:752:5: note: remove the 'if' if its condition is always false if (virNWFilterBindingCreateXMLEnsureACL(conn, def) < 0) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ nwfilter/nwfilter_driver.c:742:33: note: initialize the variable 'obj' to silence this warning virNWFilterBindingObjPtr obj; ^ = NULL This commit initialized 'obj' with NULL to fix the error properly. Signed-off-by: Julio Faracco <jcfaracco(a)gmail.com&gt; --- src/nwfilter/nwfilter_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/nwfilter/nwfilter_driver.c b/src/nwfilter/nwfilter_driver.c index d385b46f5f..ed34586105 100644 --- a/src/nwfilter/nwfilter_driver.c +++ b/src/nwfilter/nwfilter_driver.c @@ -739,8 +739,8 @@ nwfilterBindingCreateXML(virConnectPtr conn, const char *xml, unsigned int flags) { - virNWFilterBindingObjPtr obj; virNWFilterBindingDefPtr def; + virNWFilterBindingObjPtr obj = NULL; virNWFilterBindingPtr ret = NULL; virCheckFlags(0, NULL); -- 2.17.1