You could provide a wrapper script around ghc to pass -dynamic automatically.
Or when installing append alias ghc="ghc -dynamic" to their bashrc.
Not elegant but it's probably easier than any other solution.

Message: 1
Date: Fri, 23 Jun 2017 11:31:37 -0400
From: Ryan Trinkle <ryan.trinkle@gmail.com>
To: Haskell Cafe <haskell-cafe@haskell.org>
Subject: [Haskell-cafe] Dynamically linking frameworks on macOS
Message-ID:
	<CAHNEpix8NeMNo=ur3FX_Hs4Li8RTx4t0KT7aUutVGcN4_J5XVQ@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi everyone,

I'm trying to ensure that beginner-level code that uses reflex-dom can be
built by simply calling 'ghc myFile.hs', provided that all the necessary
libraries are available in ghc-pkg.  This works on linux, but on macOS,
it's currently necessary for the user to add '-dynamic' to the command
line.  In particular, without -dynamic, the linker fails to find
"_OBJC_CLASS_$_NSURL", which is a symbol in the Foundation system
framework.  Apple doesn't support (and strongly discourages) statically
linked executables[1], so it's not terribly surprising that this doesn't
work.

Is there anything I can do to avoid the need for -dynamic here?


Thanks,
Ryan

[1] https://developer.apple.com/library/content/qa/qa1118/_index.html