Mono Linux

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Installing and Using F# On Linux (with Mono)

Installing Mono

For Debian users, use your package manager to get

     mono-runtime 
     mono-gac
     mono-tools
     libmono-winforms2.0-cil
     libmono-system-runtime2.0-cil

You must get the last two packages! Get the packages like this

     apt-get install <package names>

or use Synaptic Package Manager

Getting and Installing F#

Download the latest version of F# from microsoft at: http://fsharp.net

Unzip the distribution file. Then

    cd FSharp-1.9.7.8   (or other)


    chmod u+x install-mono.sh
    chmod +x bin/fsc.exe
    chmod +x bin/fsi.exe


    ./install-mono.sh   

Now follow the instructions to get a copy of mono.snk.

Then rerun install-mono.sh

    ./install-mono.sh   

Look carefully for failures etc.

Using F# Interactive (fsi.exe)

This should start the F# Interactive command line compiler:

        bin/fsi.exe 

You will almost certainly want to add --readline:

        bin/fsi.exe --readline

Using the F# Compiler (fsc.exe)

This should start the F# Interactive command line compiler:

        bin/fsc.exe 

FAQ

Why is mono.snk required?

This is required because FSharp.Core.dll is strong-named with a .NET release key. Mono treats these DLLs using special rules, and the DLL must be strong-named with the Mono key. This doesn't affect the logical identity of the DLL.

The install-mono.sh script tells you where to get a copy of mono.snk.

Why does the F# compiler (fsc.exe) take a while to compile an empty file?

This is because the compiler is not pre-compiled using Mono's AOT. You can try running AOT on FSharp.Compiler.dll as follows

        mono --aot FSharp.Compiler.dll

If this succeeds, fsc.exe and fsi.exe startup times will be faster.

Why does the F# interactive (fsi.exe) take a while to respond to first input?

This is for the same reason.

Why do I get a "Missing System.Runtime.Remoting.dll" error?

You must install these mono packages:

     libmono-winforms2.0-cil
     libmono-system-runtime2.0-cil

If you don't, you will get a "missing System.Runtime.Remoting.dll" exception, among others.

I always get "warning FS0000: Could not determine highest installed .NET framework version from Registry keys, using version 2.0"

This is a known problem with F# 1.9.7.8. No workaround is possible short of post-filtering the output of the compiler.

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