objify = $(patsubst %.c,$(BUILD_DIR)/%.$2,$(patsubst %.s,$(BUILD_DIR)/%.$2,$1))

CFLAGS=-Wall -Wextra -Wpedantic -O3 -funroll-loops
LDFLAGS=
BUILD_DIR=build
AR=ar rcs
RANLIB=ranlib

CODE_SRC_C = \
	ref/csidh/rng.c \
	ref/csidh/mont.c \
	ref/csidh/csidh.c
CODE_SRC_S = \
	ref/csidh/u512.s \
	ref/csidh/fp.s
CODE_OBJ = \
 	$(call objify,$(CODE_SRC_C),o) \
 	$(call objify,$(CODE_SRC_S),o)

$(BUILD_DIR)/%.o: %.c
	case $@ in */*) f=$@; mkdir -p $${f%/*} ;; esac
	$(CC) -c -o $@ $< $(CFLAGS)

$(BUILD_DIR)/%.o: %.s
	case $@ in */*) f=$@; mkdir -p $${f%/*} ;; esac
	$(CC) -c -o $@ $< $(CFLAGS)

all: $(CODE_OBJ)
	$(AR) $(BUILD_DIR)/libcsidh.a $^
	$(RANLIB) $(BUILD_DIR)/libcsidh.a

clean:
	rm -rf build