You want old, ugly, slow, pain-in-the-ass and proprietary,? Try ClearCase. Expensive. Drain on productivity (all commits were individual file based, meaning it was extraordinarily easy to miss a change; also had no concept of an ignore, so really easy to miss adding a new file). Also, very. fucking. slow. A moderately sized project (or VOB in clearcase terminology) could take an hour to update. I've probably lost a year of my life waiting for clearcase to complete. Also, it had a habit of just royally fucking up even trivial merges (dropping braces in C++ code, for example, or ignoring whitespace changes in python code for another).
I've never used Clearcase, but I worked for Sun around 2000 and one of the things I did was analysing kernel dumps of Solaris.
If we saw the Clearcase kernel module you can be sure that that was going to be the root cause of the crash. That thing seemed to really terrible, and it wouldn't surprise me if the rest of the product was as bad.
I don't know if things have changed now, but to use Clearcase you needed a kernel module that provided a special filesystem that you did your work against.
The idea is not terrible, but when the kernel module is so unstable it brings down the build machines with a kernel panic, I'd say the execution was somewhat lacking.
