Makefile

CC ?= gcc
CFLAGS ?= -O2 -Wall -Wextra

# Build targets: default builds GTK3. Use:
#   make        -> Builds all 3 versions
#   make gtk2   -> GTK2
#   make gtk3   -> GTK3
#   make gtk4   -> GTK4

# For GTK2, a custom install prefix can be supplied via GTK2_PREFIX when the
# dev headers are not in the system path, e.g. after extracting
#   apt-get download libgtk2.0-dev && dpkg-deb -x *.deb /some/dir
#   make gtk2 GTK2_PREFIX=/some/dir/usr
ifeq ($(GTK2_PREFIX),)
GTK2_CFLAGS := $(shell pkg-config --cflags gtk+-2.0 2>/dev/null)
GTK2_LIBS   := $(shell pkg-config --libs   gtk+-2.0 2>/dev/null)
else
GTK2_CFLAGS := $(shell pkg-config --cflags glib-2.0 gdk-pixbuf-2.0 pangoft2 cairo atk gio-2.0) -I$(GTK2_PREFIX)/include/gtk-2.0 -I$(GTK2_PREFIX)/lib/x86_64-linux-gnu/gtk-2.0/include
GTK2_LIBS   := -L$(GTK2_PREFIX)/lib/x86_64-linux-gnu -lgtk-x11-2.0 -lgdk-x11-2.0 $(shell pkg-config --libs glib-2.0 gdk-pixbuf-2.0 pangoft2 cairo atk gio-2.0)
endif
GTK3_CFLAGS := $(shell pkg-config --cflags gtk+-3.0)
GTK3_LIBS   := $(shell pkg-config --libs   gtk+-3.0)
GTK4_CFLAGS := $(shell pkg-config --cflags gtk4)
GTK4_LIBS   := $(shell pkg-config --libs   gtk4)

SRCS := main.c livegraph.c

DEPFILES := $(SRCS) livegraph.h

all: gtk2 gtk3 gtk4

gtk2: $(DEPFILES)
	@echo "-------------Building GTK2----------------"
	@if [ -z "$(GTK2_CFLAGS)" ]; then \
		echo "GTK2 dev headers not found (pkg-config gtk+-2.0)"; false; fi
	$(CC) $(CFLAGS) $(GTK2_CFLAGS) $(SRCS) -o livegraph-gtk2 $(GTK2_LIBS) -lm

gtk3: $(DEPFILES)
	@echo "-------------Building GTK3----------------"
	$(CC) $(CFLAGS) $(GTK3_CFLAGS) $(SRCS) -o livegraph-gtk3 $(GTK3_LIBS) -lm

gtk4: $(DEPFILES)
	@echo "-------------Building GTK4----------------"
	$(CC) $(CFLAGS) $(GTK4_CFLAGS) $(SRCS) -o livegraph-gtk4 $(GTK4_LIBS) -lm

clean:
	rm -f livegraph-gtk2 livegraph-gtk3 livegraph-gtk4

.PHONY: all gtk2 gtk3 gtk4 clean