Compiling with mpif90

[Greg_R_]

Let me start off by says I am not a programmer. I am an SA who installed the Intel suite of compiler. I have a little HelloWorld program that I installed. Do the Intel compilers still use the gfortran that is on the system?

mpif90 -o intel-f90 intel-impi-hello.f90
[ramos@sandy ~]$ ldd intel-f90
        linux-vdso.so.1 =>  (0x00007ffe43da5000)
        libmpifort.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpifort.so.12 (0x00002b6c78821000)
        libmpi.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpi.so.12 (0x00002b6c78bca000)
        libdl.so.2 => /lib64/libdl.so.2 (0x000000353ee00000)
        librt.so.1 => /lib64/librt.so.1 (0x000000353fa00000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x000000353f200000)
        libgfortran.so.3 => /usr/lib64/libgfortran.so.3 (0x00002b6c798f6000)
        libm.so.6 => /lib64/libm.so.6 (0x000000353f600000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003541200000)
        libc.so.6 => /lib64/libc.so.6 (0x000000353ea00000)
        /lib64/ld-linux-x86-64.so.2 (0x000000353e600000)
[ramos@sandy ~]$

[jimdempseyatthecove]

No.

Make sure you source the appropriate ...sh files, then use mpiifort (mpi ifort as one word).

Jim Dempsey

[Greg_R_]

source /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/bin/mpivars.sh

[ramos@sandy ~]$ which mpiifort
/software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/bin/mpiifort
[ramos@sandy ~]$ mpiifort -o intel-impi-helloworld intel-impi-hello.f90
[ramos@sandy ~]$ ldd intel-impi-helloworld
        linux-vdso.so.1 =>  (0x00007fffbbfa1000)
        libmpifort.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpifort.so.12 (0x00002ae492c07000)
        libmpi.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpi.so.12 (0x00002ae492fb0000)
        libdl.so.2 => /lib64/libdl.so.2 (0x000000353ee00000)
        librt.so.1 => /lib64/librt.so.1 (0x000000353fa00000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x000000353f200000)
        libm.so.6 => /lib64/libm.so.6 (0x000000353f600000)
        libc.so.6 => /lib64/libc.so.6 (0x000000353ea00000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003541200000)
        /lib64/ld-linux-x86-64.so.2 (0x000000353e600000)
[ramos@sandy ~]$

[jimdempseyatthecove]

In both cases it appears that at least the Intel libraries are used. As for the compiler, you have yet to show the compiler banner as the result of mpiifort-o intel-f90 intel-impi-hello.f90

and

mpif90 -o intel-f90 intel-impi-hello.f90

The source statement you showed is sourcing the MPI system, but not necessarily the compiler selection. This would be done via:

source /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/Linux/bin/compilervars.sh intel64

Due to the fact that "which" located mpiifort it seems to imply that at some point the compilervars was sourced.

Jim Dempsey

[Greg_R_]

Thank you for the information. I guess I don't understand the comment regarding the Intel banner. When I use either mpif90 or mpiifort, the program just compiles and returns to the command line, I don't see and banner.

Greg

[Greg_R_]

I added the 'V' switch:

mpiifort -V  -o intel-impi-helloworld intel-impi-hello.f90
Intel(R) Fortran Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 17.0.1.132 Build 20161005
Copyright (C) 1985-2016 Intel Corporation.  All rights reserved.

 Intel(R) Fortran 17.0-1632
GNU ld version 2.20.51.0.2-5.47.el6_9.1 20100205

Greg

[Lorri_M_Intel]

So, is everything OK, once the startup script was sourced, or is there still a problem?

#3 looked OK to me; just want to make sure I didn't miss something

           thanks -

                   --Lorri

[Greg_R_]

Hi Lori. I have always been able to compile, my question is in regards to the gfortran library showing up, is that normal?

Greg

[TimP]

In the original post you were compiling with gfortran so the corresponding library was linked.

[Greg_R_]

No, I was NEVER compiling with gfortran, that is the point of my post. I was using mpiifort and mpif90 to compile. My question was how come the executable shows up with links to gfortran and if that is normal?

Greg

[Steve_Lionel]

mpif90 tends to invoke gfortran. The mpixxx commands are just scripts that invoke a particular compiler along with appropriate options for MPI use.

[Greg_R_]

OK, thank you. The last examples have used mpiifort and I still see a link to a gcc library.. Is that is what to be expected:

ldd intel-impi-helloworld
        linux-vdso.so.1 =>  (0x00007ffd5fdde000)
        libmpifort.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpifort.so.12 (0x00002b49eb5f3000)
        libmpi.so.12 => /software/depot/xe_2017-update-1/compilers_and_libraries_2017.1.132/linux/mpi/intel64/lib/libmpi.so.12 (0x00002b49eb99c000)
        libdl.so.2 => /lib64/libdl.so.2 (0x000000353ee00000)
        librt.so.1 => /lib64/librt.so.1 (0x000000353fa00000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x000000353f200000)
        libm.so.6 => /lib64/libm.so.6 (0x000000353f600000)
        libc.so.6 => /lib64/libc.so.6 (0x000000353ea00000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003541200000)
        /lib64/ld-linux-x86-64.so.2 (0x000000353e600000)

Greg

[Steve_Lionel]

Yes, Intel Fortran uses libgcc.

[Greg_R_]

Thank you. All of my questions have been answered.

Greg