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Re: Patch for various warnings in gcc


"Kaveh R. Ghazi" <ghazi@caip.rutgers.edu> writes:

|  > From: "John David Anglin" <dave@hiauly1.hia.nrc.ca>
|  > 
|  > > int main()
|  > > {
|  > >   int a = a;
|  > >   
|  > >   return a;
|  > > }
|  > 
|  > I tried it under HP cc (hpux10.20) and VAX Ultrix pcc, with and without "-O".
|  > All compile without error and execute returning a status of 0, except
|  > for HP cc at -O:
|  > 
|  > 507 (hiauly1)dave> cc -o self -O self.c
|  > cc: line 5: warning 5004: Uninitialized variable "a" in function "main" (5004)
| 
| But it still compiled right?
| 
| I tried cc on irix6.2 and solaris2 and it worked.

I'm not sure how I should interpret "it worked".  The above construct
strictly speaking invokes an undefined behaviour.  So in the least
damaging mode, it might return any random value.

-- Gaby


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