[cfe-commits] [patch] Refactor the include search into different c, c++ and framework functions

[Rafael Espindola]

The attached patch refactors AddDefaultSystemIncludePaths by adding
helper functions for c, c++ and framework. The only user visible
differences should be

*) Frameworks are only searched on OS X
*) The Cygwin c++ headers are now marked as c++ aware. I am almost
sure that not marking them was a bug.

One reason for doing this is just that the current functions was
getting large and with lots of nesting. Another, probably more
important, reason is that I want to add support for defining search
paths at compile time. With this refactoring this will look like

...AddDefaultCIncludePaths(..) {
  If (configure option for C set)  {
   use it.
   return;
   }
  current run time search.
}

And similarly for c++ and maybe frameworks (if those two paths are not
the only ones ever used....).

Comments?

Cheers,
-- 
Rafael Ávila de Espíndola
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