Forcing inline functions (again) - groan

[Cecil Ward via Digitalmars-d-learn]

I recently noticed
    pragma(inline, true)
which looks extremely useful. A couple of questions :
1. Is this cross-compiler compatible?

2. Can I declare a function in one module and have it _inlined_ 
in another module at the call site?

I’m looking to write functions that expand to approx one or even 
zero machine instructions and having the overhead of a function 
call would be disastrous; in some cases would make it pointless 
having the function due to the slowdown.