gentoo-overlay/dev-libs/xxhash/files/xxhash-0.6.5-compile-xxhash.o-once.patch

--- a/Makefile
+++ b/Makefile
@@ -82,7 +82,7 @@
 all: lib xxhsum xxhsum_inlinedXXH
 
 xxhsum32: CFLAGS += -m32
-xxhsum xxhsum32: xxhash.c xxhsum.c
+xxhsum xxhsum32: xxhash.o xxhsum.c
 	$(CC) $(FLAGS) $^ -o $@$(EXT)
 
 .PHONY: xxhsum_and_links
@@ -105,12 +105,12 @@
 ifeq (,$(filter Windows%,$(OS)))
 $(LIBXXH): LDFLAGS += -fPIC
 endif
-$(LIBXXH): xxhash.c
+$(LIBXXH): xxhash.o
 	@echo compiling dynamic library $(LIBVER)
-	@$(CC) $(FLAGS) $^ $(LDFLAGS) $(SONAME_FLAGS) -o $@
+	$(CC) $(FLAGS) $^ $(LDFLAGS) $(SONAME_FLAGS) -o $@
 	@echo creating versioned links
-	@ln -sf $@ libxxhash.$(SHARED_EXT_MAJOR)
-	@ln -sf $@ libxxhash.$(SHARED_EXT)
+	ln -sf $@ libxxhash.$(SHARED_EXT_MAJOR)
+	ln -sf $@ libxxhash.$(SHARED_EXT)
 
 libxxhash : $(LIBXXH)