[LLVMdev] typeinfo for llvm::MCAsmInfo is missing
grosbach at apple.com
Mon Dec 10 13:57:48 PST 2012
Llvm typically doesn't build with RTTI enabled. Perhaps that's what you're running into?
On Dec 10, 2012, at 1:27 PM, Vladimir Pouzanov <farcaller at gmail.com> wrote:
> Hi all.
> I fully understand that the problem is a bit OT for llvmdev, but I'm stuck for two days now and I really need some direct push.
> To the problem. I have a C++ shared library, that's working with llvm C++ api. Consider a function:
> static Object llvm_Target_createMCAsmInfo(Object self, Object tripleName)
> llvm::Target target = from_ruby<llvm::Target>(self);
> char const *triple = from_ruby<char const *>(tripleName);
> llvm::MCAsmInfo *MAI = target.createMCAsmInfo(triple);
> return to_ruby<llvm::MCAsmInfo>(*MAI);
> The problem here, is it's ok to use llvm::MCAsmInfo objects, but as soon as I use it in the cast (e.g. to_ruby), I immediately get an undefined symbol __ZTIN4llvm9MCAsmInfoE. Similar symbols for other llvm classes are there in my library's .o file, this one does not.
> Any hints?
> Vladimir Pouzanov
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
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