On Mon, Aug 28, 2023 at 08:21:57PM +0800, Xie XiuQi wrote: > diff --git a/tools/mm/Makefile b/tools/mm/Makefile > index 6c1da51f4177..9997b2e401ae 100644 > --- a/tools/mm/Makefile > +++ b/tools/mm/Makefile > @@ -9,7 +9,7 @@ LIB_DIR = ../lib/api > LIBS = $(LIB_DIR)/libapi.a > > CFLAGS += -Wall -Wextra -I../lib/ > -LDFLAGS += $(LIBS) > +LDFLAGS += $(LIBS) -lpthread Is this the right fix? I'm pretty sure you're suppose to use -pthread in CFLAGS in case there are other things the compiler/linker/whatever need. '-pthread' Define additional macros required for using the POSIX threads library. You should use this option consistently for both compilation and linking. This option is supported on GNU/Linux targets, most other Unix derivatives, and also on x86 Cygwin and MinGW targets.