Linked error/Makefile - c++

Question

I am sure this is stupid but i get this linker error
undefined reference to insert_record ,which is a function declared in Operations.hpp,implemented in Operations.cpp and used in main, and i can't find what is wrong in this makefile.
Maybe a pair of rested eyes can spot the problem.
It seems that operations isn't linked although the object is being created.
OBJS = main.o Operations.o CDR.o TBucketList.o RBucketList.o DateTime.o HashTable.o
CC = g++
CXXFLAGS = -W -Wall -Wno-unused -pedantic -c -g
LDFLAGS = -W -Wall -Wno-unused -pedantic -g
werhaus: $(OBJS)
$(CC) $(LDFLAGS) $(OBJS) -o werhaus
main.o : CDR.hpp Operations.hpp HashTable.hpp
$(CC) $(CXXFLAGS) main.cpp
Operations.o : Operations.hpp HashTable.hpp
$(CC) $(CXXFLAGS) Operations.cpp
TBucketList.o : TBucketList.hpp RBucketList.hpp
$(CC) $(CXXFLAGS) TBucketList.cpp
RBucketList.o : RBucketList.hpp
$(CC) $(CXXFLAGS) RBucketList.cpp
HashTable.o : HashTable.hpp TBucketList.hpp
$(CC) $(CXXFLAGS) HashTable.cpp
CDR.o : CDR.hpp DateTime.hpp
$(CC) $(CXXFLAGS) CDR.cpp
DateTime.o : DateTime.hpp
$(CC) $(CXXFLAGS) DateTime.cpp
clean:
\rm *.o werhaus
Update:
main.cpp :
insert_record(originator_number, aCDR, destination_number, hashtable1, hashtable2, BucketSize);
Operations.hpp:
void insert_record(const char*, CDR*, const char*, const Hashtable*, const Hashtable*, int);
Operations.cpp:
void insert_record(const char* originator_number, CDR* aCDR, const char* destination_number, Hashtable* hashtable1, Hashtable* hashtable2, int Bsize)
All seem fine in main..

Answer 1

There does not seem to be an error in your Makefile. As #G.M. noted, the dependencies of .o to corresponding .cpp are missing, these need to be added.
It can be that insert_record declaration in Operations.hpp does not match the definition in Operations.cpp and you end up with two functions insert_record. Check that the function declaration and definitions match: same return type and argument types, both in the same namespace.

Answer 2

I think you should better use something like this:
NAME= werhaus
CXX= g++ # Use CXX for C++
CXXFLAGS= -W -Wall -Wno-unused -pedantic -g
LDFLAGS= -g # No need for warning flags at linking
SRC= main.cpp \
Operations.cpp \
CDR.cpp \
TBucketList.cpp \
RBucketList.cpp \
DateTime.cpp \
HashTable.cpp
OBJS= $(SRC:.cpp=.o)
$(NAME): $(OBJS)
$(CXX) $(LDFLAGS) $(OBJS) -o $(NAME)
all: $(NAME)
%.o: %.cpp
$(CXX) -o $# -c $< $(CXXFLAGS)
clean:
rm -f $(OBJ)
fclean: clean
rm -f $(NAME)
re: fclean all
.PHONY: all clean fclean re
This type of makefile will avoid you a lot of errors.
Also, you don't need to put hpp files as dependencies.
Good luck.

Answer 3

In Operations.hpp you have a declaration with signature:
void insert_record(
const char*, CDR*,
const char*,
const Hashtable*,
const Hashtable*,
int)
In Operations.cpp you define a function with the different signature:
void insert_record(
const char* CDR*,
const char*,
Hashtable*,
Hashtable*,
int)
So the declaration in Operations.hpp is not in fact implemented in Operations.cpp
and is undefined.