Description
According to Porting Guide for ICC Users to DPCPP or ICX
- [...] Use
icxto compile and link C programs, andicpxfor C++ programs.- Unlike the
iccdriver,icxdoes not use the file extension to determine whether to compile as C or C+. Users must invokeicpxto compile C+ files.
On godbolt.org in both C and C++ mode one only gets icx. The confusion is magnified (or maybe even caused) by the fact that both compiler drivers tell you that they are the "Intel(R) oneAPI DPC++/C++ Compiler" when used with --version. But one is not just an alias of the other (at least in my installation, but their size is the same). Idk how much of a difference it makes in practice, but it is certainly confusing. A colleague just came to me saying he can't use Compiler-Explorer for trying out the Intel C++ compiler because he could not find icpx.
Also note that above guide says
In this document everything referred to ICX will apply automatically to ICPX as well unless mentioned otherwise.
which might be another cause of confusion.