[Mono-osx] What happens when a Mono is is ran without Mono?
MacPgmr at fastermac.net
Sun Mar 8 16:22:20 EDT 2009
Any assembly that you want to run under Mono on OS X depends on two
(1) The assemblies it references
(2) The native libraries these referenced assemblies import.
You can see what your .exe references as follows (in a Terminal window):
monodis --assemblyref myapp.exe
The assemblies listed (and the specific versions) are what your app
When you use macpack to create an app bundle, it creates a script
that launches Mono and runs your app. To distribute your app you
probably don't want to do this because you don't want to assume that
your user has Mono installed (not on a Mac, you don't).
Use mkbundle2 to create a normal executable binary for your app and
also combine all the dependent Mono assemblies for it into the binary.
mkbundle2 -o myapp --deps myapp.exe
You can also create this without combining the referenced assemblies
(take out --deps). You might need to do that, for example, if you
want to include the assemblies as separate files (their licenses
might require that).
Now look at what the resulting executable requires in the way of
otool -L myapp
Typically you'll see these 4 native libraries:
You would copy these files into your app bundle and use
install_name_tool to change both the libraries' identification name
and where myapp looks for these libraries.
That's a brief overview that omits some of the details. If you don't
understand all of this, then you need to go back and read up using
man or information on Apple's site. Specifically, what an app bundle
is, otool, install_name_tool, etc.
A standalone app bundle for a Mono app on OS X weighs in at about
35MB minimum for a WinForms app, and maybe about 25MB for an app that
uses the Monobjc bindings. That's seems reasonably modest for a non-
trivial app. If you compare that, say, to the footprint of the
QtGui.framework (25MB) and QtCore.framework (7MB), which would be the
minimum dependencies of a Qt-based app on Mac, the Mono size doesn't
seem bad at all.
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