Inquiry about Identifying the Compiler Used to Install WWIII Model on HPC

[krishnanathira]

Hi everyone,

I have a question regarding the installation of the WWIII model on our HPC system. There is already a WWIII model installed in the HPC account, and I am attempting to replicate the installation in my own account.

Specifically, I am seeking guidance on how to determine the compiler that was used to install the existing WWIII model. Knowing the compiler information is crucial for ensuring compatibility and replicating the setup accurately.

Could someone kindly provide insights or steps on how I can identify the compiler used for the current WWIII model installation? Your assistance is highly appreciated.

Thank you,
Athira

[JessicaMeixner-NOAA]

Have you reached out to who installed WW3 on your HPC system?

[krishnanathira]

I couldn't actually.
Thanks

[ukmo-ccbunney]

Sometimes the compiler stores its name and version in the executable. You can access this information using objdump or nm, e.g.

objdump -h your_exe

The -h flag displays the headers in the executable. The compiler version is sometimes stored in the .note or .comment headers. However, often this info is stripped out when doing a release build (without -g flags)...

It's worth a try though!

[krishnanathira]

Thanks a lot.
I will certainly try this.

[hot007]

To add to the objdump suggestion, I also use ldd your_exectuable to get a list of the libraries linked. Whether the output is useful depends on how the HPC's module system and compiler set up is designed but often it can be helpful.

[krishnanathira]

Thanks a lot

[CarstenHansen]

On our setup we require that the execution environment matches the build environment. To control that I set up the right execution environment, I run readelf -d ww3_shel. The output is not as detailed as ldd your_exectuable, but provides all the library runpaths in one line, e.g.:

0x000000000000001d (RUNPATH)            Library runpath: [/opt/netcdf-4.9.2/gcc-netcdf4/lib:/opt/netcdf-fortran-4.6.0/gfortran-13.1.0-ieee/lib:/opt/gcc-13.1.0/lib64:/opt/isl-0.24/lib:/opt/mpc-1.3.1/lib:/opt/mpi/openmpi-4.1.5/gfortran-13.1.0-ieee/lib]`

[krishnanathira]

Thats great.
Many Thanks!