FreeBSD 6 compiling against incorrect version of OpenSSL
I'm not sure what versions of tor this affects, but so far it's been a problem with any version that didn't exist in BSD ports. Apparently BSD ports already makes the necessary changes to the Makefile, so any version installed via ports will work properly.
As I understand it, FreeBSD has a version of OpenSSL included with the base system that is older than the version included in ports. Other programs in the base system link against the version of OpenSSL included in the base system, and programs installed from ports will link with the one included from ports. The version of OpenSSL in the base system is installed in /lib, while the ports version is in /usr/local/lib.
When compiling tor from source, whether a stable release, unstable release, or from CVS, the compile will proceed without any warnings or errors. However, upon running tor, the node is unable to establish connections to any other tor nodes. I couldn't figure out why at first, just lots of TLS errors about broken connections, until I found out the tor binary linked to the wrong version of OpenSSL. I guess the older version (I'm not sure what version it is) doesn't support the necessary things.
Anyway, I tried using the configure script to force tor to build using OpenSSL from /usr/local/lib, but it never seemed to work. I'm assuming that the GNU automake/autoconf/whatever tools simply link with the first version of a needed library it finds. I'm not a programmer nor a developer, so I don't know how this whole process really works. I did find out, though, that if I add "-rpath=/usr/local/lib" to the LDFLAGS in src/or/Makefile, tor will compile and link against the proper version of OpenSSL. This is how the BSD port does it, and it took me a little while to figure it out. Upon changing the Makefile and rebuilding tor, it works like a charm.
I don't know how to permanently fix it, but, in case anyone else is having problems and looks here, at least they'll see this documented. ;)
[Automatically added by flyspray2trac: Operating System: BSD]