[llvm-commits] CVS: llvm/Makefile.rules

[Chris Lattner]

On Wed, 24 May 2006, Reid Spencer wrote:
>> +# this can be overridden on the make command line.
>> +OPTIMIZE_OPTION := -O3
>
> Yuck! :)
>
> That means anyone not using a compiler that understands -O3 will have to
> put that on every make command line. I assume this is a temporary
> situation. What we ought to do is put the value into Makefile.config.in
> and have configure deduce it when it determines the kind of compiler
> we'll be using.  If that makes sense, can you file a bug and I'll get to
> it eventually?

That's not the intention of this option.  The specific situation I have is 
that some versions of GCC crash when compiling some of the LLVM sources as 
-O3.  As a temporary work around, I'm forcing -O2 to be used: ugly but 
effective.  The only way to check for this in an autoconf check would be 
to compile all of llvm with -O3 :)

I don't think the LLVM build systems are well suited for compilers that 
don't grok -O3, but this patch doesn't change that...

-Chris

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