对符号“pthread_mutexattr_setpshared@@GLIBC_2.2.5”的未定义引用

问：

我试图添加-lpthread，但它没有用。这是我的 makefile：

mpi_bench: mpbench.o flushall.o timer.o my_send.o mem_manager.o
    $(MP_MPI_CC) $(MP_LDFLAGS)  mpbench.o flushall.o timer.o my_send.o mem_manager.o -o $@ $(MPI_LIBS) $(MP_LIBS)

mpbench.o: mpbench.c
    $(MP_MPI_CC) $(MP_CFLAGS) $(MPI_INC) -DMPI -I.. -c  mpbench.c  -o mpbench.o 

timer.o: ../timer.c
    $(MP_MPI_CC) -c -I.. ../timer.c -o $@ 

flushall.o: ../flushall.c
    $(MP_MPI_CC) -c -I.. ../flushall.c -o $@  

my_send.o: my_send.cpp
    $(MP_MPI_CC)  -c -I.. my_send.cpp -o my_send.o -lrt 
mem_manager.o: mem_manager.cpp
    $(MP_MPI_CC)  -c -I.. mem_manager.cpp -o mem_manager.o -lrt -lpthread

这是错误信息

mpicc   mpbench.o flushall.o timer.o my_send.o mem_manager.o -o mpi_bench  -lrt
/usr/bin/ld: mem_manager.o: undefined reference to symbol 'pthread_mutexattr_setpshared@@GLIBC_2.2.5'
/usr/bin/ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

谁能帮我？非常感谢