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macro warnings in Xcode 4.6
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macro warnings in Xcode 4.6


  • Subject: macro warnings in Xcode 4.6
  • From: James Walker <email@hidden>
  • Date: Tue, 29 Jan 2013 15:41:58 -0800

I tried turning on -Weverything in Xcode 4.6, and here are a couple of warnings I didn't understand.

First, whenever I use a variadic macro (e.g., #define FOO(...)), I get a warning saying "variadic macros are a C99 feature". My C and C++ language dialects are set to "Compiler Default". According to Quick Help, Compiler Default currently means GNU99, which implies C99. So why am I being warned about it?

Second, every time I use "bool", there's a warning "disabled expansion of recursive macro", with a reference to stdbool.h which says #define bool bool if __GNUC__ is defined.
--
  James W. Walker, Innoventive Software LLC
  <http://www.frameforge3d.com/>
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