So from your list below as I've labeled them, only (3) works in my testing with 
GCC8 as the pass-through compiler between the SciPy script creating this code & 
the linker. I have not tested any other GCC version, but I'm guessing it's the 
linker that's called that determines whether the -rpath flag usage is valid. As 
I said: This is a fairly recent change in the linker, which I'm guessing has 
something to do with which linker is being used: MP's or Xcode's. All of my 
testing over the weekend was on 10.14, which passes the link command through to 
Xcode's linker. I will try testing on my older OSX boxes to see what happens 
there, since I'm guessing they use MP's linker (as Xcode's is so old). If (3) 
works on all of the linkers, then I'll go with it (patching to include the 
""s). - MLD

On Mon, Feb 4, 2019, at 12:22 AM, Ken Cunningham wrote:
> My understanding is that this should not work:
> 
(1) > -Wl,-rpath=“DIR”
> 
> But these two are functionally the same, assuming they are not reordered.
> 
(2) > -Wl,-rpath -Wl,”DIR”
> 
> or 
> 
(3) > -Wl,-rpath,”DIR”
> 
> Both are sent to the linker as two options sequentially:
> 
> -rpath “DIR”
> 
> Ken

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