makefile

# This Makefile should be used as a template for future Makefiles.
# It’s heavily commented, so hopefully you can understand what each
# line does.
# We’ll use gcc for C compilation and g++ for C++ compilation
CC = gcc
CXX = g++
# Let’s leave a place holder for additional include directories
INCLUDES =
# Compilation options:
# -g for debugging info and -Wall enables all warnings
CFLAGS = -g -Wall -std=c99 $(INCLUDES)
CXXFLAGS = -g -Wall $(INCLUDES)
# Linking options:
# -g for debugging info
LDFLAGS = -g
# List the libraries you need to link with in LDLIBS
# For example, use "-lm" for the math library
LDLIBS = -lm
# The 1st target gets built when you type "make".
# It’s usually your executable. ("main" in this case.)
#
# Note that we did not specify the linking rule.
# Instead, we rely on one of make’s implicit rules:
#
# $(CC) $(LDFLAGS) <all-dependent-.o-files> $(LDLIBS)
#
# Also note that make assumes that main depends on main.o,
# so we can omit it if we want to.
rsplit: rsplit.o rsplitimpl.o
# main.o depends not only on main.c, but also on rsplitimpl.h because
# main.c includes rsplitimpl.h. main.o will get recompiled if either
# main.c or rsplitimpl.h get modified.
#
# make already knows main.o depends on main.c, so we can omit main.c
# in the dependency list if we want to.#
# make uses the following implicit rule to compile a .c file into a .o
# file:
#
# $(CC) -c $(CFLAGS) <the-.c-file>
#
rsplit.o: rsplit.c rsplitimpl.h
# And myadd.o depends on rsplitimpl.c and rsplitimpl.h.
rsplitimpl.o: rsplitimpl.c rsplitimpl.h
# Always provide the "clean" target that removes intermediate files.
# What you remove depend on your choice of coding tools
# (different editors generate different backup files for example).
#
# And the "clean" target is not a file name, so we tell make that
# it’s a "phony" target.
.PHONY: clean
clean:
	rm -f *.o a.out core main rsplit
# "all" target is useful if your Makefile builds multiple programs.
# Here we’ll have it first do "clean", and rebuild the main target.
.PHONY: all
all: clean rsplit