Updated library build

lib/Makefile

+CC       = gcc
+CFLAGS   = -O3 -fomit-frame-pointer -funroll-loops -march=native
+CPPFLAGS = -DNDEBUG -Wall -Wextra
+TARGETS  = sais-lite-lcp
+SOURCES  = sais-lite-lcp/sais.c
+OBJECTS  = $(SOURCES:.c=.o)
+
+.PHONY: clean
+
+lib$(TARGETS:./%=%).a: $(OBJECTS)
+	ar rcs $@ $<
+
+clean:
+	rm -f $(OBJECTS) lib$(TARGETS:./%=%).a
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<