在MPI程序中使用pthread会出现编译错误

Question

我正在尝试运行一个使用pthreads的MPI程序。我可以在本地机器上编译和运行，但不能在服务器上完成。

这是我用来编译的命令。

target1: TARGET=main
target2: TARGET=kmer_finaliser
CC = mpic++
# CPPFLAGS = -pg 
# CPPFLAGS = -lm -g -Wall -pthread
CPPFLAGS = -std=c++11 -pthread
USER_LIBS = -I /home/ruchin/sparsehash-sparsehash-2.0.4/src 
main: main.o extractor.o com.o kmer_dump.o thread_pool.o
$(CC) $(CPPFLAGS) -o kmer_counter.out main.o extractor.o com.o kmer_dump.o thread_pool.o $(USER_LIBS)
main.o: main.cpp extractor.h com.h kmer_dump.h thread_pool.h
$(CC) $(CPPFLAGS) -c main.cpp $(USER_LIBS)
kmer_finaliser: kmer_finaliser.o kmer_dump.o
$(CC) $(CPPFLAGS) -o kmer_finaliser.out kmer_finaliser.o kmer_dump.o $(USER_LIBS)
kmer_finaliser.o: kmer_finaliser.cpp kmer_dump.h
$(CC) $(CPPFLAGS) -c kmer_finaliser.cpp $(USER_LIBS)
extractor.o: extractor.cpp extractor.h
$(CC) $(CPPFLAGS) -c extractor.cpp $(USER_LIBS)
com.o: com.cpp com.h
$(CC) $(CPPFLAGS) -c com.cpp $(USER_LIBS)
kmer_dump.o: kmer_dump.cpp kmer_dump.h
$(CC) $(CPPFLAGS) -c kmer_dump.cpp $(USER_LIBS)
thread_pool.o: thread_pool.cpp kmer_dump.h
$(CC) $(CPPFLAGS) -c thread_pool.cpp $(USER_LIBS)

这就是我犯的错误。

/usr/bin/ld: thread_pool.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'
/lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

Answer 1

根据g++的手册页，您还应该在编译中包含标志-pthread:

-phread定义使用POSIX线程所需的附加宏图书馆对于这两种情况，您应该始终使用此选项编译和链接。上支持此选项GNU/Linux目标，大多数其他Unix衍生物，以及x86 Cygwin和MinGW目标。