Directory open-wonka/compiler

Apart from the ubiquitous Jamfile, this directory has two subdirectories:

none
The "null" runtime compiler implementation, which contains no code.
j-spot
J-spot(TM), an adaptive profiling run-time compiler.

One or other directory will be included in the build according to the setting of the COMPILER variable (-sCOMPILER=j-spot or -sCOMPILER=none).