The compilation fails with the following error when pcap-config is not present on the host: nwfilter/nwfilter_learnipaddr.c:824:1: error: conflicting types for 'virNWFilterLearnIPAddress' virNWFilterLearnIPAddress(virNWFilterTechDriverPtr techdriver ATTRIBUTE_UNUSED, In file included from nwfilter/nwfilter_learnipaddr.c:57:0: nwfilter/nwfilter_learnipaddr.h:38:5: note: previous declaration of 'virNWFilterLearnIPAddress' was here int virNWFilterLearnIPAddress(virNWFilterTechDriverPtr techdriver, Signed-off-by: Brijesh Singh <brijesh.singh(a)amd.com&gt; --- src/nwfilter/nwfilter_learnipaddr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/nwfilter/nwfilter_learnipaddr.c b/src/nwfilter/nwfilter_learnipaddr.c index 52adc37..ce58f66 100644 --- a/src/nwfilter/nwfilter_learnipaddr.c +++ b/src/nwfilter/nwfilter_learnipaddr.c @@ -829,7 +829,7 @@ virNWFilterLearnIPAddress(virNWFilterTechDriverPtr techdriver ATTRIBUTE_UNUSED, const char *filtername ATTRIBUTE_UNUSED, virHashTablePtr filterparams ATTRIBUTE_UNUSED, virNWFilterDriverStatePtr driver ATTRIBUTE_UNUSED, - enum howDetect howDetect ATTRIBUTE_UNUSED) + int howDetect ATTRIBUTE_UNUSED) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("IP parameter must be given since libvirt " -- 2.7.4