为另一个平台编译mpirun和mpif90（交叉编译？）

Question

I have a system A (aka Host) with compilers and a system B (aka Target) where I would like to run a MPI application. On system B there is no compiler or mpirun. I would like to do the following: compile mpirun (from openmpi) on system A and then using it on system B (with executable compiled on system A). I have never compiled for a different platform. Can this thing work? What do I do with shared libraries? I see that mpirun links to :

linux-vdso.so.1 =>  (0x00002aaaaaaab000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003a89e00000)
libm.so.6 => /lib64/libm.so.6 (0x0000003a89600000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003a89a00000)
libc.so.6 => /lib64/libc.so.6 (0x0000003a89200000)
/lib64/ld-linux-x86-64.so.2 (0x0000003a88e00000) 

do I have to statically link mpirun to libraries on system A? How do I do that?

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Also, I would like to know if I can compile mpif90 on system A, so I can use it directly to compile programs on system B. Keep in mind that there is no compiler on system B, and I am not willing to install them

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output of uname -a on Host

Linux host 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64 x86_64 GNU/Linux

output of uname -a on Target

Linux target 2.6.35-32-server #67-Ubuntu SMP Mon Mar 5 21:13:25 UTC 2012 x86_64 GNU/Linux

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so far I have tried to compile with the following configuration

CC=icc
FC=ifort
CXX=icpc
LDFLAGS=-static-intel

./configure --prefix=/gpfs/data/garzilli/data/local/openmpi-1.8.4-cc/ --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --enable-static --disable-shared

I know that in this case I am not technically cross-compiling, because host and build coincide, in principle they could be different. Maybe, should I also set --target , because I am compiling a compiler?

Answer 1

It is possible to compile on one platform and execute on the other. I do this often with Fortran binaries compile with ifort and mpif90. I just ran a test where I compiled an executable with the ifort compiler and mpif90 on OpenSUSE 2.6.34 kernel x86_64 and ran it on a Amazon Linux kernel version 3.14 x86_64 that had no mpi libs installed.

The problem is that without mpirun (or mpiexec), you will only be able to run a single instance of the program. So, if you have to launch multiple instances, you will need something like mpirun on the other machine (system B) to launch the multiple instances.