Re: [PATCH] Building Git on Tru64

"Daniel Richard G." [off-list ref] writes:

On Thu, 2010 Apr 15 21:29+0200, Alex Riesen wrote:

quoted

That one may be better handled at one place (git-compat-util.h?) with
something like:

  #ifdef Tru64
  #define MAP_FAILED ((void *)MAP_FAILED)
  #endif

I agree with the sentiment, but you can't have a macro refer to itself

It can.  From (cpp.info)

  3.10.5 Self-Referential Macros
  ------------------------------

  A "self-referential" macro is one whose name appears in its definition.
  Recall that all macro definitions are rescanned for more macros to
  replace.  If the self-reference were considered a use of the macro, it
  would produce an infinitely large expansion.  To prevent this, the
  self-reference is not considered a macro call.  It is passed into the
  preprocessor output unchanged.

  [...]

     One common, useful use of self-reference is to create a macro which
  expands to itself.  If you write

       #define EPERM EPERM

-- 
Jakub Narebski
Poland
ShadeHawk on #git