undefined symbol `MPI_recv'

Question

When I link my MPI C program, I get the following error: undefined reference to MPI_recv .

What should i do to solve this error?

Answer 1

它是MPI_Recv ，不是MPI_recv 。

Answer 2

You need to link to the MPI library that provides the MPI_recv() function. For example, with gcc , you would add an option like -lmpi to your compile line.

Answer 3

MPI implementations usually provide a compilation utility scripts that basically sets up the correct compilation & linking environment, libraries and calls gcc (eg) with the correct command line.

Try this:

mpicc my_prog.c

Hope this helps.

A.