Preprocessing
-------------
During compilation, all configuration files are pre-processed by a simple
C-like preprocessor, which supports `#ifdef`, `#ifndef`, `#if`,
`#elsif`, `#else` and `#endif` directives referring to compile-time
Preprocessing
-------------
During compilation, all configuration files are pre-processed by a simple
C-like preprocessor, which supports `#ifdef`, `#ifndef`, `#if`,
`#elsif`, `#else` and `#endif` directives referring to compile-time