我正在尝试在xcode 4中运行一些MPI程序。我通过键入sudo port install openmpi
从MacPort安装了openmpi,安装正常完成。然后我将opt / local / include / openmpi添加到我的用户头搜索路径,将“libmpi.dylib”和“libmpi_cxx.dylib”拖到我的项目中。
但是当我尝试运行该程序时,我收到以下错误消息:
Undefined symbols for architecture x86_64:
"_MPI_Comm_accept", referenced from:
MPI::Intracomm::Accept(char const*, MPI::Info const&, int) const in main.o
"_MPI_Comm_connect", referenced from:
MPI::Intracomm::Connect(char const*, MPI::Info const&, int) const in main.o
"_MPI_Comm_disconnect", referenced from:
MPI::Comm::Disconnect() in main.o
"_MPI_Comm_get_errhandler", referenced from:
MPI::Comm::Get_errhandler() const in main.o
"_MPI_Comm_set_errhandler", referenced from:
MPI::Comm::Set_errhandler(MPI::Errhandler const&) const in main.o
"_MPI_Comm_spawn", referenced from:
MPI::Intracomm::Spawn(char const*, char const**, int, MPI::Info const&, int) const in main.o
MPI::Intracomm::Spawn(char const*, char const**, int, MPI::Info const&, int, int*) const in main.o
"_MPI_Comm_spawn_multiple", referenced from:
MPI::Intracomm::Spawn_multiple(int, char const**, char const***, int const*, MPI::Info const*, int) in main.o
MPI::Intracomm::Spawn_multiple(int, char const**, char const***, int const*, MPI::Info const*, int, int*) in main.o
"_MPI_Grequest_complete", referenced from:
MPI::Grequest::Complete() in main.o
"_MPI_Op_commutative", referenced from:
MPI::Op::Is_commutative() const in main.o
"_MPI_Reduce_local", referenced from:
MPI::Op::Reduce_local(void const*, void*, int, MPI::Datatype const&) const in main.o
"_MPI_Win_call_errhandler", referenced from:
MPI::Win::Call_errhandler(int) const in main.o
"_MPI_Win_get_errhandler", referenced from:
MPI::Win::Get_errhandler() const in main.o
"_MPI_Win_set_errhandler", referenced from:
MPI::Win::Set_errhandler(MPI::Errhandler const&) const in main.o
"_ompi_mpi_comm_null", referenced from:
MPI::Intracomm::Intracomm(ompi_communicator_t*) in main.o
MPI::Graphcomm::Graphcomm(ompi_communicator_t* const&) in main.o
MPI::Cartcomm::Cartcomm(ompi_communicator_t* const&) in main.o
"_ompi_mpi_comm_world", referenced from:
_main in main.o
"_ompi_mpi_double", referenced from:
_main in main.o
"_ompi_mpi_op_sum", referenced from:
_main in main.o
"_ompi_op_set_cxx_callback", referenced from:
MPI::Op::Init(void (*)(void const*, void*, int, MPI::Datatype const&), bool) in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
我在上述安装过程中遗漏了什么吗?
答案 0 :(得分:15)
首先确保安装了MPI。 我个人使用brew来执行此操作。
brew update
brew install open-mpi
然后检查c ++的要求:
mpic++ -showme
或mpicc -showme for c
我使用mpic ++的输出是:
clang++ -I/usr/local/Cellar/open-mpi/1.8.6/include -L/usr/local/opt/libevent/lib -L/usr/local/Cellar/open-mpi/1.8.6/lib -lmpi_cxx -lmpi
然后我们得到了包含路径,库路径和其他一些标志。从上一个命令的输出中我们得到了我们需要添加的内容:
这些可以通过Xcode项目中的构建设置选项完成。
因为 mpi 需要使用它自己的运行我们的程序,我们需要更改可执行文件。
cmd + shift + g
。要运行 mpiexec ,需要知道参数处理器数量和可执行文件。因此,在参数
下的同一对话框中
<mpi.h>
标题。来源:open-mpi xcode FAQ,Debugging & running MPI programs in Xcode
答案 1 :(得分:5)
我遇到了同样的问题,当我从源代码编译openmpi时,添加了头和库搜索路径,但忘了将库添加为构建设置的链接器标志。添加它们就解决了这个您可以键入mpicc –showme
以查看mpi运行所需的库。
答案 2 :(得分:0)
或者只输入mpic ++而不是mpicc。这对我有用;)