Hi Joseph, the make TARGET is just an example, you can use whatever makes sense on your system. With CentOS 5.3 your probably have a 2.6.18 kernel, so you need to use TARGET=linux26.
Do you get the same errors with TARGET=linux26? Also does $ make TARGET=linux26 USE_OPENSSL=1 build or not (without ADDINC and ADDLIB)? Can you post the exact errors with linux26 with our without ADDINC/ADDLIB? I'm not sure what happens here ... Also kindly post the output of $ /opt/libsslbuild/bin/openssl version $ ls /opt/libsslbuild/lib $ ls /opt/libsslbuild/include/openssl Regards, Lukas

