the directory in which temporary files should be generated
The option can take one of four settings. Automatic, the default, removes all intermediate files except on Windows, where the .exp and .lib files are preserved since they are needed when compiling files using the library. True removes all intermediate files. False preserves all intermediate files. Full indiscriminately removes all files in the working directory whether they are intermediate files or not.
If the result is to be quite independent of Mathematica, then the option should be set to : this makes sure that MathLink libraries are not included in the link stage.