work around gcc 4.8's generation of self-referential mem* functions at -O3
diff --git a/Makefile b/Makefile
index 96910bd..00aa706 100644
--- a/Makefile
+++ b/Makefile
@@ -87,6 +87,9 @@
OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
$(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
+MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
+$(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_MEMOPS)
+
%.o: $(ARCH)/%.s
$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<