Undefined symbols "vtable for ..." and "typeinfo for..."?

user_205364 0
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Nearly the final step but still some strange erros....

bash-3.2$ make
g++ -Wall -c -g Myworld.cc
g++ -Wall -g solvePlanningProblem.o Position.o AStarNode.o PRM.o PRMNode.o World.o SingleCircleWorld.o Myworld.o RECTANGLE.o CIRCLE.o -o solvePlanningProblem
Undefined symbols:
  "vtable for Obstacle", referenced from:
      Obstacle::Obstacle()in Myworld.o
  "typeinfo for Obstacle", referenced from:
      typeinfo for RECTANGLEin RECTANGLE.o
      typeinfo for CIRCLEin CIRCLE.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [solvePlanningProblem] Error 1

What's the meaning of vtable and typeinfo?

linker-errors undefined-reference vtable pure-virtual c++
5 Answers

There is another reason you can get this error, and just want to document it here. I was linking with a static library which did not have RTTI. So Using the C++ flag -fno-rtti fixed for me. If you do not need RTTI, you can using this flag as well. Hope this helps.

user_4780280
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