From: URABE Shyouhei <shyouhei@...>
Date: 2006-07-31T08:58:41+09:00
Subject: Re: [ ruby-Bugs-5243 ] #if should be #ifdef in ruby.h

Hi,

Nikolai Weibull wrote:
> Because if LONG_LONG_VALUE /isn't/ defined, it'll cause a compiler
> warning with GCC if GCC is passed the -Wundef option.

I believe ANSI C defines that an undefined macros showld be expanded to 
zero when they appear in preprocessor-parsed lines.  GCC -Wundef is 
somewhat meddlesome, and hence, is not a default option of GCC. Why do 
you want to turn that option on?