Makefile.posix

# Linux has llvm-config-xx in PATH, where xx is version number
# On macos, brew installs LLVM to a weird place in /usr/local/
# On NetBSD, use llvm-config from libLLVM (package from pkgsrc)
LLVM_CONFIG ?= $(shell \
	which llvm-config-14 \
	|| which /usr/local/opt/llvm@14/bin/llvm-config \
	|| which llvm-config-13 \
	|| which /usr/local/opt/llvm@13/bin/llvm-config \
	|| which llvm-config-11 \
	|| which /usr/local/opt/llvm@11/bin/llvm-config \
	|| which /usr/pkg/libexec/libLLVM/llvm-config \
	)
CFLAGS += $(shell $(LLVM_CONFIG) --cflags)
CFLAGS += -gdwarf-4  # https://github.com/llvm/llvm-project/issues/56550
LDFLAGS ?= $(shell $(LLVM_CONFIG) --ldflags --libs)

ifeq ($(CC),cc)
	# default c compiler --> use clang
	CC := $(shell \
	which `$(LLVM_CONFIG) --bindir`/clang \
	|| which clang \
	)
endif

all: jou compile_flags.txt

# point clangd to the right include folder so i don't get red squiggles in my editor
compile_flags.txt:
	echo "-I$(shell $(LLVM_CONFIG) --includedir)"  > compile_flags.txt

config.h:
	@v=`$(LLVM_CONFIG) --version`; case "$$v" in 11.*|13.*|14.*) ;; *) echo "Error: Found unsupported LLVM version $$v. Only LLVM 11, 13 and 14 are supported."; exit 1; esac
	echo "// auto-generated by Makefile" > config.h
	echo "#define JOU_CLANG_PATH \"$(CC)\"" >> config.h

obj/%.o: src/%.c $(wildcard src/*.h) config.h
	mkdir -p obj && $(CC) -c $(CFLAGS) $< -o $@

jou: $(SRC:src/%.c=obj/%.o)
	$(CC) $(CFLAGS) $^ -o $@ $(LDFLAGS)

config.jou:
	echo "# auto-generated by Makefile" > config.jou
	echo "def get_jou_clang_path() -> byte*:" >> config.jou
	echo "    return \"$(CC)\"" >> config.jou

self_hosted_compiler: jou config.jou $(wildcard self_hosted/*.jou)
	./jou -o $@ --linker-flags "$(LDFLAGS)" self_hosted/main.jou

.PHONY: clean
clean:
	rm -rvf obj jou jou.exe self_hosted_compiler self_hosted_compiler.exe tmp config.h config.jou compile_flags.txt
	find . -name jou_compiled -print -exec rm -rf '{}' +