Makefile

ifneq ($(notdir $(CXX)), em++)
$(error You need to install/source emscripten and run with "emmake make")
endif

CXXFLAGS = -std=c++1z \
	--bind \
	--memory-init-file 0 \
	--pre-js ccv_pre.js \
	-s EXPORT_NAME=\"'CCVLib'\" \
	-s MODULARIZE=1 \
	-s NO_EXIT_RUNTIME=1 \
	-s TOTAL_MEMORY=$$((2 << 29))

CPPFLAGS = -I"./external/ccv/lib"

LDFLAGS = -L"./external/ccv/lib"

LDLIBS = -lccv


.PHONY: all release debug clean

all: release

release: CXXFLAGS += -O3 --llvm-lto 1 -s AGGRESSIVE_VARIABLE_ELIMINATION=1 -s OUTLINING_LIMIT=10000 # TODO --closure 1
release: build/ccv.js build/ccv_without_filesystem.js build/ccv_wasm.js

# TODO this target isn't tested and probably doesn't work
# Also you probably need to do `emmake make clean` before building debug if you've already built release
debug: CXXFLAGS += -v -g4 -s ASSERTIONS=1 -s DEMANGLE_SUPPORT=1 -s SAFE_HEAP=1 -s STACK_OVERFLOW_CHECK=1
debug: CXXFLAGS += -Weverything -Wall -Wextra
debug: build/ccv.js build/ccv_without_filesystem.js build/ccv_wasm.js


WITH_FILESYSTEM_CXXFLAGS = -s NO_FILESYSTEM=0 -s FORCE_FILESYSTEM=1 \
	--embed-file external/ccv/samples/face.sqlite3@/ \
	--embed-file external/ccv/samples/pedestrian.m@/ \
	--embed-file external/ccv/samples/car.m@/ \
	--embed-file external/ccv/samples/pedestrian.icf@/

build/ccv.js: CXXFLAGS += $(WITH_FILESYSTEM_CXXFLAGS)
build/ccv.js: CPPFLAGS += -DWITH_FILESYSTEM
build/ccv.js: ccv_bindings.cpp external/ccv/lib/libccv.a ccv_pre.js
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) ccv_bindings.cpp -o $@ $(LDLIBS)


# Same as build/ccv.js but uses WASM. Outputs an additional build/ccv_wasm.wasm file.
build/ccv_wasm.js: CXXFLAGS += -s WASM=1
build/ccv_wasm.js: CXXFLAGS += $(WITH_FILESYSTEM_CXXFLAGS)
build/ccv_wasm.js: CPPFLAGS += -DWITH_FILESYSTEM
build/ccv_wasm.js: build/ccv.js
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) ccv_bindings.cpp -o $@ $(LDLIBS)


# TODO rather than a separate build target we should just load the data files on demand
build/ccv_without_filesystem.js: CPPFLAGS += -s NO_FILESYSTEM=1
build/ccv_without_filesystem.js: ccv_bindings.cpp external/ccv/lib/libccv.a ccv_pre.js
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) ccv_bindings.cpp -o $@ $(LDLIBS)


external/ccv/lib/libccv.a:
	git submodule update --init
	cd external/ccv/lib && git checkout stable && emconfigure ./configure --without-cuda && emmake make libccv.a

clean:
	rm -f build/*
	#cd external/ccv/lib && make clean