gcc -Wunreachable-code option

[Vijayaraghavan Murali]

Thank you both, Ian and Axel! I will check it out.

--------
Vijayaraghavan Murali
http://www.comp.nus.edu.sg/~mvijayar


Axel Freyn wrote:
> 
> Hi,
> On Wed, May 25, 2011 at 05:14:48AM -0700, Vijayaraghavan Murali wrote:
>> 
>> I'm trying to make gcc generate warnings for detecting unreachable code
>> in a program using -Wunreachable-code. But it simply doesn't seem to
>> work, even for a simple program such as:
>> int main() { return 1; return 0; }
>> 
>> I don't find -Wunreachable-code in man gcc, but it doesn't complain if I
>> pass the option to it.
>> 
>> I must be clearly missing something trivial here and would appreciate
>> any help. I'm using gcc 4.5.2 and installed gcc-opt, if it matters.
> 
> The option was removed january 2010 -- so you would need an older gcc.
> to get it.
> If I remeber correctly, the concerns were about unpredictability due to
> different optimization-option.
> See the discussion on
> http://gcc.gnu.org/ml/gcc-patches/2009-11/msg00179.html
> 
> Axel
> 
> 

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