From: "Bradley, Stephen W. Mr." <bradlesw@xxxxxxxxxx> > ./configure --prefix=/usr --includedir=/usr/include --datadir=/usr/share > --bindir=/usr/sbin --libexecdir=/usr/lib/squid --localstatedir=/var > --sysconfdir=/etc/squid --enable-wccpv2 --enable-linux-netfilter > --enable-default-err-language=English --enable-err-languages=English > --enable-async-io --enable-removal-policies=lru,heap > --disable-auth > It dies the same way on three different systems. Tried your exact configure command and it still works... Did you check the configure output? Only things on my side are these warnings: configure: WARNING: Auth scheme modules built: None configure: WARNING: cppunit does not appear to be installed. squid does not require this, but code testing with 'make check' will fail. configure: WARNING: Missing needed capabilities (libcap or libcap2) for TPROXY configure: WARNING: Linux Transparent Proxy support WILL NOT be enabled configure: WARNING: Reduced support to Interception Proxy configure: WARNING: Missing needed capabilities (libcap or libcap2) for TPROXY v2 configure: WARNING: Linux Transparent Proxy support WILL NOT be enabled Strange thing is that libcap and libcap-devel are installed... And on make: WARNING: Translation toolkit was not detected. $ grep -C1 int64_t /usr/include/stdint.h # if __WORDSIZE == 64 typedef long int int64_t; # else __extension__ typedef long long int int64_t; # endif I have: glibc-2.5-42.el5_4.3 glibc-headers-2.5-42.el5_4.3 gcc-4.1.2-46.el5_4.2 JD