# This is a general-purpose makefile for building C and C++ code that links to
# opencv libraries.
#
# Most configuration variables are set with ?= to allow environment variables
# to override them.
#
# Basic usage:
#
# make cvdemo
# ./cvdemo ARGS
#
# to compile cvdemo.c to the executable cvdemo and then run it, where ARGS are
# the command line arguments (if any) that you want to pass to cvdemo.  Default
# config will also compile and link with cvbase.c or cvbase.cpp.

EMPTY :=
SPACE := $(EMPTY) $(EMPTY)

# list of extra source dependencies of executables
CV_DEPS_C ?= cvbase.c
CV_DEPS_CXX ?= cvbase.cpp

CV_VER ?= 2.3.1

ifneq ($(patsubst MINGW%,MINGW,$(shell uname)),MINGW)
CV_PKG_GEN ?= opencv
CV_PKG_VER ?= $(CV_PKG_GEN)-$(CV_VER)
CV_PKG ?= $(shell if pkg-config --exists $(CV_PKG_VER); \
                     then echo $(CV_PKG_VER); \
                     else echo $(CV_PKG_GEN); fi)
# https://code.ros.org/trac/opencv/ticket/1475
CV_LIBS ?= $(patsubst -l%.so.$(CV_VER),%.so.$(CV_VER), \
             $(shell pkg-config --libs $(CV_PKG)))
CV_FLAGS ?= $(shell pkg-config --cflags $(CV_PKG))
else
CV_DRIVE ?= c
CV_ARCH ?= x86
CV_PKG ?= opencv
ifneq ($(CC),cl)
CV_DIR ?= $(CV_DRIVE):/$(CV_PKG)
CV_INC ?= $(CV_DIR)/build/include
CV_LIB ?= $(CV_DIR)/build/$(CV_ARCH)/mingw/bin
CV_FLAGS ?= -I$(CV_INC)/opencv -I$(CV_INC)
CV_LIBS ?= -shared-libgcc $(wildcard $(CV_LIB)/*.dll)
else
CV_DIR ?= $(CV_DRIVE):\$(CV_PKG)
CV_INC ?= $(CV_DIR)\build\include
CV_LIB ?= $(CV_DIR)\build\$(CV_ARCH)\vc10\lib
CV_FLAGS ?= //I$(CV_INC)\opencv //I$(CV_INC)
CV_LIBS ?= //MD //link //LIBPATH:$(CV_LIB) $(notdir $(wildcard $(CV_LIB)/*.lib))
OUT_FLAG = //Fe
endif
endif

CFLAGS += $(CV_FLAGS)
CXXFLAGS += $(CV_FLAGS)

OUT_FLAG ?= -o$(SPACE)

show-settings:
	@echo CV_DEPS_C=$(CV_DEPS_C)
	@echo CV_DEPS_CXX=$(CV_DEPS_CXX)
	@echo CV_PKG=$(CV_PKG)
	@echo CV_LIBS=$(CV_LIBS)
	@echo CV_FLAGS=$(CV_FLAGS)

%.o: %.c
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $<

%.o: %.cpp
	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $<

%.o: %.cc
	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $<

%: %.c $(CV_DEPS_C)
	$(CC) $(CPPFLAGS) $(CFLAGS) $(OUT_FLAG)$@ $^ $(CV_LIBS)

%: %.cpp $(CV_DEPS_CXX)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(OUT_FLAG)$@ $^ $(CV_LIBS)

%: %.cc $(CV_DEPS_CXX)
	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(OUT_FLAG)$@ $^ $(CV_LIBS)

clean:
	$(RM) *.o *.obj