Virtual Function computeNbModels missing =0 in DAG.hh

[eternity8]

When compiling for Mac Arm64 (using g++ and c++ 14 for std), I was getting a linker error stating:

Undefined symbols for architecture arm64:
  "DAG<boost::multiprecision::number<boost::multiprecision::backends::gmp_int, (boost::multiprecision::expression_template_option)1>>::computeNbModels()", referenced from:
      vtable for DAG<boost::multiprecision::number<boost::multiprecision::backends::gmp_int, (boost::multiprecision::expression_template_option)1>> in Main.o
  "DAG<boost::multiprecision::number<boost::multiprecision::backends::gmp_float<0u>, (boost::multiprecision::expression_template_option)1>>::computeNbModels()", referenced from:
      vtable for DAG<boost::multiprecision::number<boost::multiprecision::backends::gmp_float<0u>, (boost::multiprecision::expression_template_option)1>> in Main.o
ld: symbol(s) not found for architecture arm64

This was after updating to the arm64 binary for gmp

It was fixed for me by replacing virtual T computeNbModels(); with virtual T computeNbModels()=0; in DAG/DAG.hh