#
# Compiler settings
#
CC = gcc
CFLAGS = -Wall -ansi -funroll-loops
LIBS = -lm

#
# Compiler options for packages
#
CAIRO = $(shell pkg-config cairo --libs --cflags)
GTK2 = $(shell pkg-config gtk+-2.0 --libs --cflags)
GTK3 = $(shell pkg-config gtk+-3.0 --libs --cflags)
GTKGL = $(shell pkg-config gtk+-2.0 gtkglext-1.0 --libs --cflags)
GLUT = -lglut -lGL

#
# Cairo test programs
#
PROGRAMS_CAIRO = \
	cairo1_drawing \
	cairo2_transformation \
	cairo3_recursion

#
# GTK test programs working with versions 2.x and 3.x
#
PROGRAMS_GTK = \
	gtk1_button \
	gtk2_hbox \
	gtk3_packing \
	gtk4_data \
	gtk5_menu

#
# GTK test programs working only with version 2.x
#
PROGRAMS_GTK2 = \
	gtk6_cairo \
	gtk7_animation

#
# GTK test programs working only with version 3.x
#
PROGRAMS_GTK3 = \
	gtk6b_cairo \
	gtk7b_animation

#
# GLUT test programs
#
PROGRAMS_GLUT = \
	glut1_window \
	glut2_perspective \
	glut3_rotate \
	glut4_lighting \
	glut5_cylinder

#
# GTKGL test programs
#
PROGRAMS_GTKGL = \
	gtkgl1_window \
	gtkgl2_perspective \
	gtkgl3_rotate \
	gtkgl4_lighting \
	gtkgl5_cylinder

#
# Build targets
#
all: $(PROGRAMS_CAIRO) $(PROGRAMS_GTK) $(PROGRAMS_GTK2) $(PROGRAMS_GTK3) $(PROGRAMS_GTKGL) $(PROGRAMS_GLUT)
cairo: $(PROGRAMS_CAIRO)
gtk2: $(PROGRAMS_GTK) $(PROGRAMS_GTK2)
gtk3: $(PROGRAMS_GTK3)
gtkgl: $(PROGRAMS_GTKGL)
glut: $(PROGRAMS_GLUT)

all: $(PROGRAMS_CAIRO) $(PROGRAMS_GTK) $(PROGRAMS_GTK2)

clean:
	rm -f $(PROGRAMS_CAIRO) $(PROGRAMS_GTK) $(PROGRAMS_GTK2) $(PROGRAMS_GTK3) $(PROGRAMS_GTKGL) $(PROGRAMS_GLUT)

#
# Build rule for Cairo programs
#
$(PROGRAMS_CAIRO): %: %.c
	$(CC) $(CFLAGS) $< $(LIBS) $(CAIRO) -o $@

#
# Build rule for GTK+ 2.x programs
#
$(PROGRAMS_GTK) $(PROGRAMS_GTK2): %: %.c
	$(CC) $(CFLAGS) $< $(LIBS) $(GTK2) -o $@

#
# Build rule for GTK+ 3.x programs
#
$(PROGRAMS_GTK3): %: %.c
	$(CC) $(CFLAGS) $< $(LIBS) $(GTK3) -o $@

#
# Build rule for GTKGL programs
#
$(PROGRAMS_GTKGL): %: %.c
	$(CC) $(CFLAGS) $< $(LIBS) $(GTKGL) -o $@

#
# Build rule for GLUT programs
#
$(PROGRAMS_GLUT): %: %.c
	$(CC) $(CFLAGS) $< $(LIBS) $(GLUT) -o $@