Conditional compiling allows you to turn compiling on or off from within your program depending on the environment the program is being compiled for.
Conditional compiling works a bit like an If statement, but takes the form:
- ?Identifier
The ? must appear at the start of a new line, and Identifier should be one of the following:
| Name | Meaning |
| Debug | True if program is being compiled in debug mode. |
| Threaded | True if program is being compiled in threaded mode. |
| Win32 | True if program is being compiled for the Windows operating system. |
| MacOS | True if program is being compiled for the MacOS operating system. |
| Linux | True if program is being compiled for the Linux operating system. |
| X86 | True if program is being compiled for the Intel CPU. |
| PPC | True if program is being compiled for the PowerPC CPU. |
| MacOSX86 | True if program is being compiled for an Intel Mac. |
| MacOSPPC | True if program is being compiled for a PowerPC Mac. |
| BigEndian | True if program is being compiled for a big endian CPU. |
| LittleEndian | True if program is being compiled for a little endian CPU. |
Identifier may also be preceded by Not to invert the result.
An ? on its own always turns compiling on.
For example:
?Debug 'Any code here is only compiled in debug mode. ?Not Debug 'Any code here is only compiled in release mode. ? 'Code here is always compiled.