-march=generic unsupported

[ereisch]

When I try to compile a source file with 15.0.2, and set the flag "-march=generic", I receive the warning "invalid argument for option '-m'".  The documentation (or more specifically, the manpage) for ifort specifies "generic" as an available option for the -march flag.  This appears to be an oversight in the documentation.

[Steven_L_Intel1]

It looks as if this has been a problem for a long time. I note that gcc doesn't have such an option. If you really want to do this, -mcpu=generic works. Issue ID is DPD200255416

[ereisch]

Thanks.  Actually I'm trying to prevent the Fortran RTL from calling the "ENTER" x86 opcode (0xC8).  I'm trying to valgrind my Fortran program to find a memory leak and it chokes on that opcode shortly after starting, since it doesn't support it.  It appears to be called from within __intel_cpu_indicator_init(), so I was hoping by turning off CPU-specific optimizations I could prevent this routine from being called.  Since gcc hasn't supported emitting this instruction for a very long time (apparently, everyone says "don't use it; it's slow"), the developers of valgrind have expressed hesitation at implementing it anytime soon, if at all.

[Steven_L_Intel1]

Compiler options won't help here as they don't affect library calls (at least not this one). I would not expect to see a call to this made if you didn't also use -x or -ax.