[cfe-dev] clang vs. gcc

[Chris Lattner]

On May 1, 2009, at 10:25 AM, Filipe Cabecinhas wrote:

> I'm just trying to compile valgrind. But valgrind is using  
> __builtin_longjmp because it can't use libc. This doesn't compile  
> because clang doesn't define that function. How could I pass this  
> problem?

The best way is to implement __builtin_longjmp in clang!

-Chris

>
>
> Chris Lattner wrote:
>> On May 1, 2009, at 10:19 AM, Filipe Cabecinhas wrote:
>>> So... There's no way I can use a setjmp/longjmp (or something that  
>>> has the same effect) without using libc? or I can just use setjmp/ 
>>> longjmp happily (when compiling with clang) and it will get  
>>> translated to something other than the call to libc?
>> Are you experiencing an actual problem here?  While C doesn't  
>> specify that this is legal, you can probably get away with it.   
>> Just mark any local variables as volatile.
>> -Chris