Instructions

167 C-Control Pro IDE

Compiler4

4.1 General Features

This domain provides information on the Compiler’s properties and features which are independent of

the programming language used.

4.1.1 Preprocessor

The Gnu Generic Preprocessor used here provides some additional functions which are docu-

mented under http://nothingisreal.com/gpp/gpp.html. Only the functions described here however have

also together with the C-Control Pro Compiler been thoroughly tested. Using the here undocumented

functions will thus be at your own risk!

The C-Control development system contains a complete C-Preprozessor. The Preprocessor pro-

cesses the source text prior to Compiler start. The following commands are supported:

Definitions

By the command "#define" text constants are defined.

#define symbol text constant

Since the Preprocessor runs ahead of the Compiler at each appearance of symbol in the source text

the symbol will be replaced by text constant.

Example

#define PI 3.141

If a project consists of several sources then #define is a constant for all source files existing fol-

lowing the file, in which the constant has been defined. It is thus possible to change the order of

source files in a project.

Conditional Compiling

#ifdef symbol

...

#else // optional

...

#endif

It is possible to monitor which parts of the source texts are really being compiled. After a #ifdef sym-

bol instruction the following text is only compiled when symbol has also been defined by #define

symbol.