gdb options

Makefile

 CXX = g++
-CXXFLAGS = -Wall -Wextra -Werror -pedantic -std=c++1y
+CXXFLAGS = -Wall -Wextra -Werror -pedantic -std=c++1y -g3 -ggdb3
 SRC = main.cpp mainclass.cpp
 OBJ = $(addprefix src/, $(SRC:.cpp=.o))