-dM (-qshowmacros)
Category
Pragma equivalent
None
Purpose
Emits macro definitions to preprocessed output.
Emitting macros to preprocessed output can help determine functionality available in the compiler. The macro listing may prove useful for debugging complex macro expansions, as well.
Syntax
>>- -dM--------------------------------------------------------><
Defaults
-qnoshowmacros
Usage
Note the following when using this
option:
- This option has no effect unless preprocessed output is generated; for example, by using the -E or -P options.
- If a macro is defined and subsequently undefined before compilation ends, this macro will not be included in the preprocessed output.
- Only macros defined internally by the preprocessor are considered predefined; all other macros are considered as user-defined.
