Compilers on HPC

Illegal Instruction errors

Some HPC systems like Princeton’s della cluster can have sufficiently different architectures between the login node and the compute node that you get Illegal Instruction errors. This happens if the -march=native flag is enabled during compilation and can be fixed by simply removing that flag.

Forcing distutils to use Intel

Something like this

LDSHARED="icc -shared" CC=icc $(PYTHON) setup.py build_ext --inplace

seems to be necessary to force Python’s distutils to use an Intel compiler instead of gcc.

What instruction sets does a program/library use

Sigurd has made: http://folk.uio.no/sigurdkn/amop

One can do e.g.: amop libsharp.a

to list the instructions used.

Show dependencies

ldd file.so