You can use the /Fo option (Windows*) or -c and -o options (Linux* and macOS*) to specify an alternate name for an object file. In this example, the compiler generates an object file name myobj.obj (Windows*) or myobj.o (Linux and macOS*).
// Linux and macOS*
icpc -c -omyobj.o x.cpp
// Windows icl /Fomyobj x.cpp