[cfe-dev] Ignore certain macros during AST generation

[Ramesh J via cfe-dev]

Hi,

I using the RecursiveASTVisitor class to parse C programs.

The programs contain certain compiler specific macros like using, eg, asm,
interrupt, __a0 and so on.
Is there a compiler option in clang to ignore this Marocs?
Or this there a way to do the same using libtooling interface?



Note: QAC/ QAC++ offers option to redefine the macro with values like
_ignore to remove it's effect during parsing

References Link:
1. http://johnnygreen.biz/QACpp_Component_Manual.pdf#Ignoring tokens and
keywords

2. http://products.programmingresearch.com/Docs/Getting_Started_2.0.pdf
 Section-6.2

Thank you in advance.
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