Simple Makefile for command line Swift

Makefile

# Simple Makefile for command line Swift projects
# Gene De Lisa

PROG        = example
SRC         = src/*.swift
INSTALL_DIR = ./bin

SWIFTC=xcrun --sdk macosx swiftc

# this is a hack right now just to compile
SWIFTC_COMMON_FLAGS = -parse-as-library

default: debug

release: SWIFTC_FLAGS =  -DRELEASE -O
release: $(PROG)
	strip $(INSTALL_DIR)/$(PROG) # removes debug symbols


debug: SWIFTC_FLAGS = -DDEBUG -g
debug: $(PROG)

# canonical Swift Intermediate Language
# https://github.com/apple/swift/blob/main/docs/SIL.rst
# -emit-silgen generates raw SIL
# -emit-sil generates canonical SIL
# xcrun swiftcff -emit-sil -O -wmo main.swift | xcrun swift-demangle,
sil: SWIFTC_FLAGS = -O -wmo $(SWIFTC_COMMON_FLAGS)
sil: $(SRC)
	$(SWIFTC) $(SWIFTC_FLAGS) $^ -emit-sil | xcrun swift-demangle


$(PROG): $(SRC)
	$(SWIFTC) $(SWIFTC_FLAGS) $(SWIFTC_COMMON_FLAGS) -o $@ $^
	cp $(PROG) $(INSTALL_DIR)

clean:
	rm -rf $(PROG) $(PROG).dSYM

# also remove the installed binary
realclean:
	rm -rf $(PROG) $(PROG).dSYM $(INSTALL_DIR)/$(PROG)


# make ARGS="foo" run
# make run ARGS="foo"
run: $(PROG)
	$(INSTALL_DIR)/$(PROG) $(ARGS)

.PHONY: run clean realclean