targetdir = ~/public_html/Courses/P2200_16F/downloads

CC        = clang
LDFLAGS   = -O2
CFLAGS    = -Weverything -Wextra -pedantic $(LDFLAGS)
LDLIBS    = $(shell gsl-config --libs)

INDENT    = astyle --style=allman --add-brackets
GNUPLOT   = gnuplot
PDFVIEWER = evince
LATEX     = pdflatex
EDITOR    = /usr/bin/emacs -fn 9x15 -g 90x30+100+40

.SUFFIXES:
.SUFFIXES:  .c .o .h .res .gp

.PHONY: clean veryclean indent pdf

target    = lotka-volterra

latexfile = $(target)
sources   = $(target).c
objects   = $(sources:.c=.o)
result    = $(target).res
pdf       = $(target).pdf
figs      = $(target)-fig1.pdf $(target)-fig2.pdf

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

## lotka-volterra: Compile and link the executable
$(target) : $(objects)
	$(CC) $(LDFLAGS)  $(objects) -o $@ $(LDLIBS)

## res         : Run the calculations
res: $(result)
$(result): $(target)
	./$(target) > $(target).res

## pdf         : Run pdflatex, bibtex, and mkindex necessary many times 
##               to generate the pdf document
pdf: $(pdf)
$(pdf): $(latexfile).tex
	while ($(LATEX) $(latexfile) ; \
	grep -q "Rerun to get cross" $(latexfile).log ) do true ; \
	done

## edit        : Open the latex file in the editor
edit : $(latexfile).tex
	$(EDITOR) $(latexfile).tex  2> /dev/null &

## figs        : Graph the results
figs: $(figs)
$(figs):  $(result) $(target).gp
	$(GNUPLOT) $(target).gp

## view        : Open the graph in a pdf viewer
view: $(pdf)
	$(PDFVIEWER) $(pdf) 2> /dev/null &

## figview     : Open the graph in a pdf viewer
figview: $(figs)
	$(PDFVIEWER) $(figs) 2> /dev/null &

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

## clean       : Remove the auto-generated files
clean : 
	rm -f *.o
	rm -f *.*~
	rm -f *.*.orig
	rm -f $(target)
	rm -f $(target).log 
	rm -f $(target).out
	rm -f $(latexfile).aux

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

## upload      : Upload the pdf and clean the auto-generated files
upload: pdf clean
	chmod go+r $(pdf)
	mv $(pdf) $(targetdir)

## settings    : Show variables and settings.
settings:
	@echo ' '
	@echo 'latexfile :' $(latexfile)
	@echo 'sources   :' $(sources)
	@echo 'objects   :' $(objects)
	@echo 'target    :' $(target)
	@echo 'result    :' $(result)
	@echo 'pdf       :' $(pdf)
	@echo 'figs      :' $(figs)
	@echo ' '
	@echo 'INDENT    :' $(INDENT)
	@echo 'GNUPLOT   :' $(GNUPLOT)
	@echo ' '
	@echo 'CC        :' $(CC)
	@echo 'LDFLAGS   :' $(LDFLAGS)
	@echo 'CFLAGS    :' $(CFLAGS)
	@echo 'LDLIBS    :' $(LDLIBS)
	@echo ' '