LIBGL := -lGL -lGLU
LIBSDL := `sdl-config --libs`
LIBS := ${LIBSDL} ${LIBGL}

OPTFLAGS := -O2
DBGFLAGS := -ggdb
PRFFLAGS := ${DBGFLAGS} -pg
CXXFLAGS := -Wall -pedantic -ansi ${DBGFLAGS}

VALFLAGS := --leak-check=full

TARGET := ../run_physics

SRCS := # simply to keep every line below the same

DIRS := # := start
DIRS += .
DIRS += Entities
DIRS += GameStates
DIRS += Effects
DIRS += config
DIRS += input
DIRS += graphics

include $(addsuffix /files.mk,${DIRS})

OBJSDIR := ../objs/
OBJS := ${SRCS:.cpp=.o}
OBJS := $(addprefix ${OBJSDIR},${OBJS})

DEPSDIR := ../deps/
DEPS := ${SRCS:.cpp=.d}
DEPS := $(addprefix ${DEPSDIR},${DEPS})

HRDS := ${SRCS:.cpp=.h}
HRDS := $(filter-out main.h,$HRDS) # remove main.h
HRDS += debug.h

HRDS += graphics/colors.h

TARS := ${SRCS} ${HRDS} Makefile


VERBOSE := 0

ifeq (${VERBOSE},0)
    # quiet the echo command
    Q1 := @
    # quiet the command that is `replaced' by an echo
    Q2 := @
else
    # EAT the echo command as if it was not there
    Q1 := @true # NOTE: the space between @true and the # is VERY important!!
    # do not quiet the command output
    Q2 :=
endif

.PHONY: all
all: ${TARGET}

${TARGET}: ${OBJS}
	${Q1}echo "${CXX}: $@"
	${Q2}${CXX} ${CXXFLAGS} -o $@ $^ ${LIBS}

# rule to make a depend file from a .cpp
${DEPSDIR}%.d: %.cpp
	${Q1}echo "DEP: $@"
	${Q2}${CXX} -MM ${CXXFLAGS} $< | sed 's,\(^.*\):,${OBJSDIR}\1 $@:,' > $@

# rule to make an object file from a .cpp
${OBJSDIR}%.o: %.cpp
	${Q1}echo "${CXX}: $@"
	${Q2}${CXX} ${CXXFLAGS} -c -o $@ $<


.PHONY: clean
clean:
	${Q1}echo "CLEAN: OBJS"
	${Q2}rm -f ${OBJS}
	${Q1}echo "CLEAN: TARGET"
	${Q2}rm -f ${TARGET}

.PHONY: distclean
distclean: clean
	${Q1}echo "CLEAN: DEPS"
	${Q2}rm -f ${DEPS}
	${Q1}echo "CLEAN: tags prof gmon.out"
	${Q2}rm -f tags prof gmon.out

.PHONY: gitclean
gitclean:
	${Q1}echo "git-clean: show, use gitcleanf to force"
	${Q2}cd ..; git clean -nxd

.PHONY: gitcleanf
gitcleanf:
	${Q1}echo "git-clean: forced"
	${Q2}cd ..; git clean -fxd

tags: ${SRCS}
	ctags $^

.PHONY: tar
tar: ../physics.tar.bz2

.PHONY: ../physics.tar.bz2
../physics.tar.bz2:
	@echo "git-archive: Warning, archives HEAD not current"
	${Q1}echo "git-archive: ../physics.tar.bz2"
	${Q2}cd ..; git-archive --prefix=physics/ HEAD | bzip2 > physics.tar.bz2

.PHONY: run
run: all
	cd ..; ./run_physics

.PHONY: gdb
gdb: all
	gdb ${TARGET}

.PHONY: val
val: all
	valgrind ${VALFLAGS} ${TARGET}

.PHONY: prof
prof: all
	${TARGET}
	gprof -b ${TARGET} > prof
	kprof -f prof

-include ${DEPS}