autotools: pthread deps is needed on ubuntu.

It is weird but adding pthread in needed on ubuntu 1204.

diff --git a/configure.in b/configure.in
index 406a8a53d5b723d98d23198aec5240f4d0320ecc..02f3ce6e5fadd0f65c806a5f49daca7109321ae8 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -802,7 +802,7 @@ AC_INIT(configure.in)
     fi
 
     LIBPCAP=""
-    AC_CHECK_LIB(pcap, pcap_open_live,, LIBPCAP="no")
+    AC_CHECK_LIB(pcap, pcap_open_live,, LIBPCAP="no", [-lpthread])
     if test "$LIBPCAP" = "no"; then
         echo
         echo "   ERROR!  libpcap library not found, go get it"