Adding -Wextra -Werror to compiler flags and fixing issues.

BitcodeEmitter.cpp

@@ -129,6 +129,8 @@ llvm::Type *LLVMType(Type const& type) {
         case Type::UNKNOWN:
             return nullptr; // FIXME
     }
+
+    return nullptr;
 }
 
 static
@@ -355,7 +357,7 @@ bool BitcodeEmitter::emit(Input const& node) {
     return true;
 }
 
-bool BitcodeEmitter::emit(Abort const& node) {
+bool BitcodeEmitter::emit(Abort const&) {
     llvm::Function *callee = module->getFunction(ABORT_NAME);
 
     if (callee == nullptr) {

CMakeLists.txt

@@ -85,7 +85,9 @@ include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}
 )
 
-add_definitions(-Wall -Wno-deprecated-register -std=c++0x -DYYDEBUG=0 -O2)
+add_definitions(
+    -Wall -Wextra -Werror -Wno-deprecated-register -std=c++0x -DYYDEBUG=0 -O2
+)
 
 bison_target(Parser Monicelli.ypp ${CMAKE_CURRENT_BINARY_DIR}/Parser.cpp)
 flex_target(Scanner Monicelli.lpp ${CMAKE_CURRENT_BINARY_DIR}/Lexer.cpp)

main.cpp

@@ -26,7 +26,7 @@
 
 using namespace monicelli;
 
-int main(int argc, char **argv) {
+int main() {
     Program program;
     Scanner scanner(&std::cin);
     Parser parser(scanner, program);