Re: [Xen-devel] [PATCH] compile with -funit-at-a-time option of gcc

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30 Jun 2005, at 08:21, Ian Pratt wrote:

> > This patch makes xen compiled with gcc option
> > -funit-at-a-time if supported. This option is available for
> > gcc 3.4 and upward, which reduces the .text binary size considerably.
> I haven't come across this option before. What does it actually do?
Considers whole file at a time when doing optimisation. It's the 
default on gcc4 with -O2 and above. We probably don;t want to enable it 
before a general move to gcc4 as it does break stuff (albeit stuff that 
was buggy/broken already ;-) ). Adding another skanky CFLAG that will 
be defaulted anyway in future, to get the benefit of maybe subtly 
breaking Xen, doesn;t sound like a big win to me.
 -- Keir


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