SHELL = /usr/bin/env bash
MAKEFLAGS+= --no-print-directory
# note: do not manually define any i_… arguments, or incremental compiling will not work properly!

# various configurations
o3:
	@${MAKE} i_singeli=0 i_t=o3         i_f="-O3" run_incremental_0
o3g:
	@${MAKE} i_singeli=0 i_t=o3g        i_f="-O3 -g" run_incremental_0
o3n:
	@${MAKE} i_singeli=0 i_t=o3n        i_f="-O3 -march=native" run_incremental_0
debug:
	@${MAKE} i_singeli=0 i_t=debug      i_f="-g -DDEBUG" run_incremental_0
debug1:
	@${MAKE} i_singeli=0 i_t=debug1     i_f="-g -DDEBUG" manualJobs=1 run_incremental_0
rtperf:
	@${MAKE} i_singeli=0 i_t=rtperf     i_f="-O3 -DRT_PERF" run_incremental_0
rtverify:
	@${MAKE} i_singeli=0 i_t=rtverify   i_f="-DDEBUG -O3 -DRT_VERIFY -DEEQUAL_NEGZERO" run_incremental_0
heapverify:
	@${MAKE} i_singeli=0 i_t=heapverify i_f="-DDEBUG -g -DHEAP_VERIFY" run_incremental_0
o3n-singeli:
	@${MAKE} i_singeli=1 i_t=o3n_si     i_f="-O3 -march=native" run_incremental_0
o3ng-singeli:
	@${MAKE} i_singeli=1 i_t=o3ng_si    i_f="-g -O3 -march=native" run_incremental_0
debugn-singeli:
	@${MAKE} i_singeli=1 i_t=debugn_si  i_f="-g -DDEBUG -march=native" run_incremental_0
heapverifyn-singeli:
	@${MAKE} i_singeli=1 i_t=heapverifyn_si i_f="-g -DDEBUG -DHEAP_VERIFY -march=native" run_incremental_0
rtverifyn-singeli:
	@${MAKE} i_singeli=1 i_t=rtverifyn_si i_f="-O3 -DRT_VERIFY -DEEQUAL_NEGZERO -march=native" run_incremental_0
wasi-o3:
	@${MAKE} i_singeli=0 i_t=wasi_o3 i_OUTPUT=BQN.wasm i_f="-DWASM -DWASI -DNO_MMAP -O3 -DCATCH_ERRORS=0 -D_WASI_EMULATED_MMAN --target=wasm32-wasi" i_lf="-lwasi-emulated-mman --target=wasm32-wasi -Wl,-z,stack-size=8388608 -Wl,--initial-memory=67108864" i_LD_LIBS= i_PIE= i_FFI=0 run_incremental_0
emcc-o3:
	@${MAKE} i_singeli=0 i_t=emcc_o3 i_OUTPUT=BQN.js CC=emcc i_f='-DWASM -DEMCC -O3' i_lf='-s EXPORTED_FUNCTIONS=_main,_cbqn_runLine,_cbqn_evalSrc -s EXPORTED_RUNTIME_METHODS=ccall,cwrap -s ALLOW_MEMORY_GROWTH=1' i_FFI=0 run_incremental_0
shared-o3:
	@${MAKE} i_OUTPUT=libcbqn.so i_SHARED=1 i_t=shared_o3 i_f="-O3" run_incremental_0
shared-c:
	@${MAKE} i_OUTPUT=libcbqn.so i_SHARED=1 custom=1                run_incremental_0
c:
	@${MAKE} custom=1 run_incremental_0

# compiler setup
i_CC := clang
i_PIE := -no-pie
i_LD_LIBS := -lm
i_FFI := 2
i_singeli := 0
i_OUTPUT := BQN

ifneq ($(origin OUTPUT),command line)
	OUTPUT := $(i_OUTPUT)
endif
ifeq ($(i_SHARED),1)
	i_PIE := -shared
	SHARED_CCFLAGS := -DCBQN_SHARED
	ifneq ($(no_fPIC),1)
		SHARED_CCFLAGS += -fPIC
	endif
else
	SHARED_CCFLAGS :=
endif
ifeq ($(origin CC),command line)
	i_CC := $(CC)
	custom = 1
endif
ifeq ($(origin singeli),command line)
	i_singeli := $(singeli)
	custom = 1
endif
ifeq ($(origin FFI),command line)
	i_FFI := $(FFI)
	custom = 1
endif
ifneq ($(i_FFI),0)
	i_LD_LIBS += -ldl -Wl,--dynamic-list=include/syms
endif
ifeq ($(i_FFI),2)
	i_LD_LIBS += -lffi
endif
ifeq ($(origin LD_LIBS),command line)
	i_LD_LIBS := $(LD_LIBS)
	custom = 1
endif
ifeq ($(origin PIE),command line)
	i_PIE := $(PIE)
	custom = 1
endif
ifeq ($(origin f),command line)
	custom = 1
else
	f:=
endif
ifeq ($(origin lf),command line)
	custom = 1
else
	lf:=
endif
ifeq ($(origin CCFLAGS),command line)
	custom = 1
endif
ifeq ($(origin LDFLAGS),command line)
	custom = 1
endif

CC_IS_CLANG = $(shell $(i_CC) --version | head -n1 | grep -m 1 -c "clang")
ifeq (${CC_IS_CLANG}, 1)
	NOWARN = -Wno-microsoft-anon-tag -Wno-bitwise-instead-of-logical -Wno-unknown-warning-option
else
	NOWARN = -Wno-parentheses
endif

ALL_CC_FLAGS = -std=gnu11 -Wall -Wno-unused-function -fms-extensions $(CCFLAGS) $(f) $(i_f) $(NOWARN) -DSINGELI=$(i_singeli) -DFFI=$(i_FFI) $(SHARED_CCFLAGS)
ALL_LD_FLAGS = $(LDFLAGS) $(lf) $(i_lf) $(i_PIE) $(i_LD_LIBS)

ifneq (${manualJobs},1)
	ifeq (${MAKECMDGOALS},run_incremental_1)
		MAKEFLAGS+= -j4 manualJobs=1
	endif
	ifeq (${MAKECMDGOALS},build_singeli)
		MAKEFLAGS+= -j4 manualJobs=1
	endif
endif

builddir:
ifeq ($(force_build_dir),)
	@printf 'obj/'
ifeq ($(custom),)
	@echo "def_$(i_t)"
else
	@[ -x "$$(command -v sha256sum)" ] && hashInput="sha256sum"; \
	[  -x "$$(command -v shasum)" ] && hashInput="shasum -a 256"; \
	printf "%s\0%s\0%s" "${i_CC}" "${ALL_CC_FLAGS}" "${ALL_LD_FLAGS}" | $$hashInput | grep -oE '[0-9a-z]{64}' | head -c32
endif
else
	@printf "%s" "$(force_build_dir)"
endif


# simple non-incremental builds
single-o3:
	$(i_CC) $(ALL_CC_FLAGS) -O3 -o ${OUTPUT} src/opt/single.c $(ALL_LD_FLAGS)
single-o3g:
	$(i_CC) $(ALL_CC_FLAGS) -O3 -g -o ${OUTPUT} src/opt/single.c $(ALL_LD_FLAGS)
single-debug:
	$(i_CC) $(ALL_CC_FLAGS) -DDEBUG -g -o ${OUTPUT} src/opt/single.c $(ALL_LD_FLAGS)
single-c:
	$(i_CC) $(ALL_CC_FLAGS) -o ${OUTPUT} src/opt/single.c $(ALL_LD_FLAGS)

# actual build
run_incremental_0:
ifeq ($(origin clean),command line)
	@export bd=$$(${MAKE} builddir); \
	${MAKE} clean-specific bd="$$bd"
else ifeq ($(origin builddir),command line)
	@export bd=$$(${MAKE} builddir); \
	echo "$$bd"
else
ifeq ($(i_singeli), 1)
	@mkdir -p src/singeli/gen
	@${MAKE} postmsg="post-singeli build:" build_singeli
endif

	@export bd=$$(${MAKE} builddir); \
	mkdir -p "$$bd";                 \
	${MAKE} run_incremental_1 bd="$$bd"
endif

run_incremental_1: builtins core base jit utils # build the final binary
	@$(i_CC) ${CCFLAGS} -o ${OUTPUT} ${bd}/*.o $(ALL_LD_FLAGS)
	@echo ${postmsg}

CC_INC = $(i_CC) $(ALL_CC_FLAGS) -MMD -MP -MF
# build individual object files
core: ${addprefix ${bd}/, tyarr.o harr.o fillarr.o stuff.o derv.o mm.o heap.o}
${bd}/%.o: src/core/%.c
	@echo $< | cut -c 5-
	@$(CC_INC) $@.d -o $@ -c $<

base: ${addprefix ${bd}/, load.o main.o rtwrap.o vm.o ns.o nfns.o ffi.o}
${bd}/%.o: src/%.c
	@echo $< | cut -c 5-
	@$(CC_INC) $@.d -o $@ -c $<

utils: ${addprefix ${bd}/, utf.o hash.o file.o mut.o each.o bits.o}
${bd}/%.o: src/utils/%.c
	@echo $< | cut -c 5-
	@$(CC_INC) $@.d -o $@ -c $<

jit: ${addprefix ${bd}/, nvm.o}
${bd}/%.o: src/jit/%.c
	@echo $< | cut -c 5-
	@$(CC_INC) $@.d -o $@ -c $<

builtins: ${addprefix ${bd}/, arithm.o arithd.o cmp.o sfns.o squeeze.o select.o sort.o md1.o md2.o fns.o sysfn.o internal.o inverse.o}
${bd}/%.o: src/builtins/%.c
	@echo $< | cut -c 5-
	@$(CC_INC) $@.d -o $@ -c $<

src/gen/customRuntime:
	@echo "Copying precompiled bytecode from the bytecode branch"
	git checkout remotes/origin/bytecode src/gen/{compiles,formatter,runtime0,runtime1,src,explain}
	git reset src/gen/{compiles,formatter,runtime0,runtime1,src,explain}
${bd}/load.o: src/gen/customRuntime



# singeli
.INTERMEDIATE: preSingeliBin
preSingeliBin:
	@if [ ! -d Singeli ]; then \
		echo "Updating Singeli submodule; link custom Singeli to Singeli/ to avoid"; \
		git submodule update --init; \
	fi
	@echo "pre-singeli build:"
	@${MAKE} i_singeli=0 singeli=0 force_build_dir=obj/presingeli f= lf= postmsg="singeli sources:" i_t=presingeli i_f='-O1 -DPRE_SINGELI' FFI=0 OUTPUT=obj/presingeli/BQN c


build_singeli: ${addprefix src/singeli/gen/, cmp.c dyarith.c copy.c equal.c squeeze.c scan.c slash.c}
	@echo $(postmsg)
src/singeli/gen/%.c: src/singeli/src/%.singeli preSingeliBin
	@echo $< | cut -c 17- | sed 's/^/  /'
	@obj/presingeli/BQN SingeliMake.bqn "$$(if [ -d Singeli ]; then echo Singeli; else echo SingeliClone; fi)" $< $@ "obj/presingeli/"



# dependency files
-include $(bd)/*.d
ifeq (${i_singeli}, 1)
-include obj/presingeli/*.d
endif

install:
	cp -f BQN /usr/local/bin/bqn

uninstall:
	rm -f /usr/local/bin/bqn

clean-singeli:
	rm -rf src/singeli/gen/
	@${MAKE} clean-specific bd=obj/presingeli
clean-runtime:
	rm -f src/gen/customRuntime
clean-build:
	rm -f obj/*/*.o
	rm -f obj/*/*.d
clean-specific:
	rm -f $(bd)/*.o
	rm -f $(bd)/*.d
	

clean: clean-build clean-runtime clean-singeli
