[cfe-dev] linker error with ASTConsumer

John McCall rjmccall at apple.com
Mon Jan 31 11:32:13 PST 2011

On Jan 31, 2011, at 11:19 AM, jignesh vasoya wrote:
> when i am trying to compile given source it gives linker error :
> tutorial4.o:(.rodata._ZTIN5clang13MyASTConsumerE[typeinfo for clang::MyASTConsumer]+0x10): undefined reference to `typeinfo for clang::ASTConsumer'
> collect2: ld returned 1 exit status
> make: *** [tutorial4] Error 1
> Source code is: all necessary header files are included and there is no syntax error in this source code, required libraries are also specified in make file.

LLVM and Clang are compiled with -fno-rtti by default.  You have three options:
  - You can re-enable RTTI when you build LLVM and Clang.
  - If you don't use RTTI in your project, you can just compile with -fno-rtti.
  - You can compile every file that emits the vtable for this class with -fno-rtti.  The easier way to do this is to anchor the vtable to a particular file and compile that with -fno-rtti.

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