FYI..
In compiling CT code <
https://code.google.com/p/certificate-transparency/> I
found that this suggested make command..
$ make OPENSSLDIR=<path to openssl> PROTOBUFDIR=<path to protobuf>
GTESTDIR=<path to gtest>
..didn't work for me in the case of PROTOBUFDIR (I'd duly built and installed
protobuf). the linker persistently failed to find protobuf
Rather what did work was doing a..
$ setenv LD_LIBRARY_PATH /usr/local/bin
This is on Ubuntu 10.04
HTH,
=JeffH