toy_compuler.sh

Gideons-Mac-mini:compiler gideon$ g++ -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS=1 -o parser parser.cpp tokens.cpp main.cpp 
Undefined symbols for architecture x86_64:
  "_LLVMLinkInJIT", referenced from:
      (anonymous namespace)::ForceJITLinking::ForceJITLinking()in ccax3uOX.o
  "CodeGenContext::generateCode(NBlock&)", referenced from:
      _main in ccax3uOX.o
  "CodeGenContext::runCode()", referenced from:
      _main in ccax3uOX.o
  "llvm::getGlobalContext()", referenced from:
      CodeGenContext::CodeGenContext()in ccax3uOX.o
  "llvm::Module::Module(llvm::StringRef, llvm::LLVMContext&)", referenced from:
      CodeGenContext::CodeGenContext()in ccax3uOX.o
  "vtable for NAssignment", referenced from:
      NAssignment::NAssignment(NIdentifier&, NExpression&)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NIdentifier", referenced from:
      NIdentifier::NIdentifier(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NMethodCall", referenced from:
      NMethodCall::NMethodCall(NIdentifier const&, std::vector<NExpression*, std::allocator<NExpression*> >&)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NBinaryOperator", referenced from:
      NBinaryOperator::NBinaryOperator(NExpression&, int, NExpression&)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NExpressionStatement", referenced from:
      NExpressionStatement::NExpressionStatement(NExpression&)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NFunctionDeclaration", referenced from:
      NFunctionDeclaration::NFunctionDeclaration(NIdentifier const&, NIdentifier const&, std::vector<NVariableDeclaration*, std::allocator<NVariableDeclaration*> > const&, NBlock&)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NVariableDeclaration", referenced from:
      NVariableDeclaration::NVariableDeclaration(NIdentifier const&, NIdentifier&)in cc2RCwuq.o
      NVariableDeclaration::NVariableDeclaration(NIdentifier const&, NIdentifier&, NExpression*)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NBlock", referenced from:
      NBlock::NBlock()in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NDouble", referenced from:
      NDouble::NDouble(double)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
  "vtable for NInteger", referenced from:
      NInteger::NInteger(long long)in cc2RCwuq.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

You need to comment out codegen()s in node.h until you complete the next step in the examples.