Right now I am doing Object-Oriented-Programming (OOP) in C++, and
I am getting to the point where I want each pair of class files (one .h
file and one .cpp file) in there own directory. How do I edit my Makefile
so that it looks in these sub-directories? Can this be done with the -I
command? My Makefile works except when I put `ThisExample.cpp' and `ThisExample.o' in a subdirectory called 'This'. I get the following error
message:
prompt# make
make: *** No rule to make target `ThisExample.cpp', needed by `ThisExample.o'. Stop.
Thanks in advance for your time and help in solving this problem.
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This is my Makefile:
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Makefile for Unix & Linux Systems #
# using a GNU C++ compiler #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# compiler flags
# -g --Enable debugging
# -Wall --Turn on all warnings
# -D_USE_FIXED_PROTOTYPES_
# --Force the compiler to use the correct headers
# -ansi --Don't use GNU ext; do use ansi standard.
CXX = g++
CXXFLAGS = -ansi -Wall
INCLUDE = -I./This/This*
OBJECTS = main.o ThisExample.o
EXE = Example
MAIN = main
TARGET1 = ThisExample
#Link command:
$(EXE): $(OBJECTS)
$(CXX) $(CXXFlAGS) $(INCLUDE) $(OBJECTS) -o $(EXE)
#Compilation commands:
$(MAIN).o: $(MAIN).cpp
$(CXX) $(CXXFlAGS) $(INCLUDE) -c $(MAIN).cpp -o $(MAIN).o
$(TARGET1).o: $(TARGET1).cpp
$(CXX) $(CXXFlAGS) $(INCLUDE) -c $(TARGET1).cpp -o $(TARGET1).o
#make clean
clean:
rm -f *.o