MvIFDEF

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Within an <MvIFDEF> block that does not generate code, the compiler still performs syntax and logical parsing of the source, so tags that require end tags (e.g., <MvCALL> and </MvCALL>) are still checked and matched.

Syntax

<MvIFDEF NAME = "string: {  expression } | literal"> 

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Attributes

Attribute	Description
NAME	The name of a symbolic code passed on the compiler command line.

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Examples

Debugging script will be included in the compiled program only if the symbolic code DEBUG is passed on the compiler command line:

<MvIFDEF NAME="DEBUG">
    ... Script included in the output if DEBUG is set ....
</MvIFDEF>

To set the symbol(s) at compile time, use the -D flag:

mvc -D DEBUG [-D ANOTHER_SYMBOL] source.mv