Is it possible to document preprocessor defines in Doxygen? I expected to be able to do it just like a variable or function, however the Doxygen output appears to have "lost" the documentation for the define, and does not contain the define its self either.

I tried the following

/**My Preprocessor Macro.*/
#define TEST_DEFINE(x) (x*x)

and

/**@def TEST_DEFINE

   My Preprocessor Macro.
*/
#define TEST_DEFINE(x) (x*x)

I also tried putting them within a group (tried defgroup, addtogroup and ingroup) rather than just at the "file scope" however that had no effect either (although other items in the group were documented as intended).

I looked through the various Doxygen options, but couldn't see anything that would enable (or prevent) the documentation of defines.