[llvm-dev] Undefined symbol error while running the pass

[Tim Northover via llvm-dev]

> What is the reason of this error ?

Looks like you forgot to include "-fno-rtti" when compiling your libMyHello.so:

$ c++filt _ZTIN4llvm12FunctionPassE
typeinfo for llvm::FunctionPass

(Alternatively, if you really use RTTI you could recompile LLVM with
it enabled; it's disabled by default for performance reasons)

Cheers.

Tim.