# Generic makefile definitions to build a
# universal program from source code
# Yves Piguet, 2024

# Usage:
# in a makefile, define:
#   TARGET = program name
#   SOURCE = list of .c files
# and optionally set vapth or VPATH, CFLAGS; then
#   include universal.mk
# This will define rules to build $(TARGET).

CC = clang
CXX = clang++
CFLAGS_X64 = -target x86_64-apple-macos13.0
CFLAGS_A64 = -target arm64-apple-macos13.0

$(TARGET): $(TARGET).universal
	mv $< $@

$(TARGET).x64: $(SOURCE:.c=.x64.o)
$(TARGET).a64: $(SOURCE:.c=.a64.o)

%.universal: %.x64 %.a64
	lipo -create -output $@ $^

%.x64:
	$(CC) $(CFLAGS_X64) -o $@ $^

%.a64:
	$(CC) $(CFLAGS_A64) -o $@ $^

%.x64.o: %.c
	$(CC) $(CFLAGS) $(CFLAGS_X64) -c -o $@ $<

%.a64.o: %.c
	$(CC) $(CFLAGS) $(CFLAGS_A64) -c -o $@ $<

%.x64.o: %.cpp
	$(CXX) $(CXXFLAGS) $(CFLAGS_X64) -c -o $@ $<

%.a64.o: %.cpp
	$(CXX) $(CXXFLAGS) $(CFLAGS_A64) -c -o $@ $<

.PHONY: clean
clean:
	rm -f *.x64.o *.a64.o *.x64 *.a64