See Also

Specifies symbols for a software toolset assembler to use to perform preliminary operations on Assembly Files (.s, .asm) before compiling the files. For example, you can use preprocessor definitions to perform the following operations:

• Macro substitution.

• Conditional compilation of a file.

• Inclusion or exclusion of named files from the compilation.

• Specification of error messages for the compilation.

• Application of processor-specific rules to specified sections of code.

Separate preprocessor definitions with commas.

If you select Custom build in the Software toolset list in the CPU page of the Settings dialog box (Processing menu), this option is dimmed to indicate that it is not available.

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