My build/configure command: ./configure --prefix=/services/proxy --enable-icmp --enable-snmp --enable-cachemgr-hostname=kmiproxy01 --enable-arp-acl --disable-select --disable-poll --enable-epoll --enable-large-cache-files --disable-ident-lookups --enable-stacktraces --with-large-files --enable-storeio="coss,ufs,null" Then I did: make && make install It failed with: fs/libcoss.a fs/libufs.a fs/libnull.a auth/libbasic.a -lcrypt ../snmplib/libsnmp.a -lmiscutil -lrt -lm -lnsl fs/libcoss.a(store_dir_coss.o): In function `storeCossDirCheckLoadAv': coss/store_dir_coss.c:687: undefined reference to `aioQueueSize' coss/store_dir_coss.c:688: undefined reference to `squidaio_magic1' fs/libcoss.a(store_dir_coss.o): In function `storeDirCoss_ReadStripe': coss/store_dir_coss.c:1227: undefined reference to `aioRead' fs/libcoss.a(store_dir_coss.o): In function `storeCossDirInit': coss/store_dir_coss.c:222: undefined reference to `aioInit' coss/store_dir_coss.c:223: undefined reference to `squidaio_init' fs/libcoss.a(store_dir_coss.o): In function `storeCossDirCallback': coss/store_dir_coss.c:735: undefined reference to `aioCheckCallbacks' fs/libcoss.a(store_io_coss.o): In function `storeCossWriteMemBuf': coss/store_io_coss.c:738: undefined reference to `aioWrite' fs/libcoss.a(store_io_coss.o): In function `storeCossNewPendingRelocate': coss/store_io_coss.c:1086: undefined reference to `aioRead' fs/libcoss.a(store_io_coss.o): In function `storeCossSync': coss/store_io_coss.c:679: undefined reference to `aioSync' collect2: ld returned 1 exit status make[3]: *** [squid] Error 1 make[3]: Leaving directory `/usr/src/kalproxy/squid-2.6.STABLE12/src' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/usr/src/kalproxy/squid-2.6.STABLE12/src' make[1]: *** [all] Error 2 make[1]: Leaving directory `/usr/src/kalproxy/squid-2.6.STABLE12/src' make: *** [all-recursive] Error 1 help would be appreciated as I've searched the FAQs and list archives. Tim Rainier