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Compilation flags

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electroRF

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Hi,

For the Pre-Processor to resolve Compilation Flags (i.e. tell whether a certain Compilation Flag was defined or not),
does it go over all the source files of the project?

Is there a certain GCC Flag Option that shows all the Compilation Flag that were defined, and their Values if they were given Values?

One more question please,
Could you explain please what is -MD Flag Option?
I read about it in GCC's guide, but did not understand what is the difference between -D and -MD.

Thank you.
 
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