llvm dev - Mar 2016 - Undefined symbol error while running the pass

Hi,

When I run my pass I am getting the following error:

*command used to run:*

*opt -load /home/batman/llvm/build/lib/libMyHello.so -MyHello <prgrm1.bc >
/dev/null*

*Error*:

*Error opening '/home/batman/llvm/build/lib/libMyHello.so':
/home/batman/llvm/build/lib/libMyHello.so: undefined symbol:
_ZTIN4llvm12FunctionPassE*
*  -load request ignored.*
*opt: Unknown command line argument '-MyHello'.  Try: 'opt
-help'*
*opt: Did you mean '-regalloc'?*

What is the reason of this error ?
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> 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.