`-C soft-float` silently ignored on x86

[MagaTailor]

On 32-bit x86 compiling with -C soft-float produces a binary but judging from the generated assembly this option is silently ignored.

Even if it's silly to expect this to work in absence of library support, shouldn't a warning be printed at least?

[GuillaumeGomez]

I think it might be a good idea to prevent users in case this option cannot be run. Want to do it @petevine?

[MagaTailor]

Provided it's not too difficult I probably wouldn't want to tread on your patch anyway ;)
What exactly were you suggesting?

[GuillaumeGomez]

I didn't start, that's why I asked you before doing anything.

[MagaTailor]

I know, it was a pun. Are we talking about a warning or an error?

[GuillaumeGomez]

My bad! :p

Since it's unavoidable, displaying an error which says something like "this option is not available on this computer" just before leaving seems fine to me.

Do you confirm @Manishearth?

[Manishearth]

I suggest we add a warning, not error. Often such flags are passed down by the build system with a "make it work if possible" intention, so we shouldn't crash.

[nagisa]

It is a bug we ignore the option and we should fix that instead. Software float emulation is possible regardless of target, but might need some extra libraries (e.g. libsoft-fp) being linked in.

[MagaTailor]

#36261