INDENT    = astyle --style=allman --add-brackets

CC        = clang
LDFLAGS   = -O
CFLAGS    = -Weverything -Wextra -pedantic $(LDFLAGS)
LDLIBS    = -lm

.SUFFIXES:
.SUFFIXES:  .c .o .h

.PHONY: clean veryclean indent all

sources   = $(wildcard *.c)
progs     = $(sources:.c=)

## help        : Default action is to show what commands are available.
help: Makefile
	@sed -n 's/^##//p' $<

## all         : Compile and link the executables
all : $(progs)

## indent      : Indent the source code
indent:
	$(INDENT) $(sources)

## clean       : Remove the auto-generated files
clean : 
	rm -f *.o
	rm -f *.*~
	rm -f *.*.orig

## veryclean   : Remove the auto-generated files, 
##               the tests results, and the graph
veryclean : clean
	rm -f $(progs)

## settings    : Show variables and settings.
settings:
	@echo ' '
	@echo 'sources   :' $(sources)
	@echo 'progs     :' $(progs)
	@echo ' '
	@echo 'INDENT    :' $(INDENT)
	@echo ' '
	@echo 'CC        :' $(CC)
	@echo 'LDFLAGS   :' $(LDFLAGS)
	@echo 'CFLAGS    :' $(CFLAGS)
	@echo 'LDLIBS    :' $(LDLIBS)
	@echo ' '