[LLVMdev] Disabling rtti on default build - could it be reverted/re-enabled?

Chris Lattner clattner at apple.com
Wed Feb 17 11:58:57 PST 2010

On Feb 17, 2010, at 3:15 AM, Heikki Kultala wrote:
> LLVM 2.7 is dropping rtti on default build, which is a problem to us.
> We are using Boost libraries on many places in our code, and Boost has 
> some heavy usage of type info tricks, which cannot be compiled without 
> rtti, so we have to keep rtti on for our code.
> But our code also implements the llvm backend framework classes, which 
> are compiled without rtti , which causes problems; we cannot derive from 
> the non-rtti enabled base classes with derived classes that are compiled 
> with rtti on.
> So could rtti be turned on for default builds of llvm so that we could 
> continue using (non-customized) llvm libraries for our compiler?

Hi Heikki,

You should be able to get this by doing "make REQUIRES_RTTI=1" when building LLVM.


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