Re: PowerPC port of PUPA

[Marco Gerards]

Johan Rydberg <address@hidden> writes:

> Marco Gerards <address@hidden> wrote:
> 
> : > Is there a reason for not having builtins?  Is it to eliminate the need
> : > for functions such as memcpy() and puts() (they do not live in the PUPA
> : > namespace) ?
> : 
> : Well, this make me think about another problem that I completely
> : haven't considered: You use alloca in your code.
> 
> There are two solutions for this.  Either use __builtin_alloca directly
> (which should still be available even with -fno-builtins.) or write a
> alloca() function yourself.  I really don't like the latter.  It is 
> "too" low-level, even for a bootloader, and might break things with new 
> versions of GCC (even thou I suspect that things like alloca is put in 
> some standard somewhere.)

Or 

3) Change the code not to use alloca. :)

For example (which is about the same):

foo = 100;
{
  char bar[foo];
  ...
}

Now that I'm, thinking about it.  I get no errors (or warnings, IIRC)
while compiling nor do I see problems runtime.  How can this slip
through or is there no problem at all?

--
Marco