hi i have some problem of compiling squid manually the configuration options are ./configure --prefix=/usr/local/squid3 --disable-maintainer-mode --enable-storeio=ufs,aufs --enable-removal-policies=lru,heap --enable-underscores --enable-external-acl-helpers=ip_user,wbinfo_group --enable-zph-qos --with-filedescriptors=32768 --with-large-files --enable-linux-netfilter --enable-htcp --with-pthreads --enable-snmp --enable-wccp --enable-wccpv2 the configuration option is done normally without any error, when i want to make the squid source the error messages appears PtrFunE[typeinfo for CommCbFunPtrCallT<CommConnectCbPtrFun>]+0x10): undefined reference to `typeinfo for AsyncCall' ./.libs/libsquid.a(CommCalls.o): In function `CommConnectCbParams': /programs/squid-3.1.0.11/src/CommCalls.cc:54: undefined reference to `DnsLookupDetails::DnsLookupDetails()' /programs/squid-3.1.0.11/src/CommCalls.cc:54: undefined reference to `DnsLookupDetails::DnsLookupDetails()' ./.libs/libsquid.a(CommCalls.o): In function `operator<<': /programs/squid-3.1.0.11/src/DnsLookupDetails.h:28: undefined reference to `DnsLookupDetails::print(std::basic_ostream<char, std::char_traits<char> >&) const' collect2: ld returned 1 exit status make[3]: *** [ufsdump] Error 1 make[3]: Leaving directory `/programs/squid-3.1.0.11/src' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/programs/squid-3.1.0.11/src' make[1]: *** [all] Error 2 make[1]: Leaving directory `/programs/squid-3.1.0.11/src' make: *** [all-recursive] Error 1 can anyone tell me what is the wrong, the OS is Debian squeeze and i update it and upgrade it, after that i installed the build-essential package, and libcap2, and even installing all the dependencies packages that exist for the squid3 in the Debian package webpage , i was installing the squid from the source normally in previous time using these options, please can anyone help me with this missing dependence thanks with my best regards