OK let's see if I could find all info you need...
I have always used the latest source directly from your website and put that in /root/COOL_VL/ where I have unpacked it into the linden directory and at the same time overwritten any existing files.
All I do when I compile is to switch libpng back to 1.2 and turning tcmalloc back on. I know you are not happy with it, but the viewer always crashes on me else. These small changes makes it 100% stable (or at least as stable anything SL-related can be, but I am very happy with it regarding stability).
Same thing done this time as all previous times. Funny though, up to 1.26.8.11 has compiled this way but not 1.26.8.12 as shown above.
Strip is installed:
Do you think I should rather clean out the directory tree and start over from scratch with the sources this/every time?