I have just installed Mono v4.0.4 on MACOSX 10.10.5 Yosemite.
The installer package was: MonoFramework-MDK-4.0.4.4.macos10.xamarin.x86.pkg downloaded from http://www.mono-project.com/download/ last night.
I have a webapi app that I would like to run with xsp4.exe. I use this command line:
/usr/bin/mono --runtime=v4.5 /Library/Frameworks/Mono.framework/Versions/4.0.4/lib/mono/4.5/xsp4.exe
I get this output:
WARNING: The runtime version supported by this application is unavailable. Using default runtime: v4.0.30319 ...
Why do I get this message? Why does it say, “the runtime version is unavailable”?
I believe I have v4.5 installed, with mono v4.0.4. In the directory /Library/Frameworks/Mono.framework/Versions/4.0.4/lib/mono, I can see
- 2.0
- 3.5
- 4.0
- 4.5
Does this NOT indicate that v4.5 of the runtime is available?
Inside the 4.5 directory, I see lots of DLLs, all symlinked to a gac directory. The targets of these symlinks exist.
I can’t figure out how to tell mono, YEAH, v4.5 DOES EXIST. USE IT.
I have a separate, probably related problem. After getting the above warning, xsp4 runs. When I try to load the ASPX app in the browser, I get the dreaded CS0234 error,
System.Web.Compilation.CompilationException CS0234: The type or namespace name `Http' does not exist in the namespace `System.Web'. Are you missing an assembly reference?
But in /Library/Frameworks/Mono.framework/Versions/4.0.4/lib/mono/4.5 , I can see
System.Web.Http.dll -> ../gac/System.Web.Http/4.0.0.0__31bf3856ad364e35/System.Web.Http.dll
And that DLL sure does exist in the gac directory. I think xsp4/mono cannot find the System.Web.Http.dll which is part of v4.5. Am I right?
I am doing something basic wrong. Can someone steer me right?
Answers:
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Method 1
mono --runtime=
That option is to control the CLR runtime:
CLR version .NET version 1.0 1.0 1.1 1.1 2.0 2.0, 3.0, 3.5 4 4, 4.5, 4.6
If you disasm xsp4.exe you will see that it requires a host that can provide the CLR 4.0 runtime:
ikdasm xsp4.exe | head -n 2 // Metadata version: v4.0.30319
Or via xCorFlags:
>>corflags xsp4.exe Mono/.NET Framework CorFlags Conversion Tool. Version 1.0.5643.36015 Copyright (c) SushiHangover. All rights reserved. Version : v4.0.30319 CLR Header: 2.5 PE : PE32 CorFlags : 0x9 ILONLY : 1 32BITREQ : 0 32BITPREF : 0 Signed : 1
Mono will auto-detect the runtime required by probing the CIL that it is loading, so there is no need to specify it unless you really need to force a different runtime version.
FYI: Mono installs shell scripts for tools/utilities for xsp4 (and others) so you do not have to hand-type the paths:
cat `which xsp4` #!/bin/sh exec /Library/Frameworks/Mono.framework/Versions/4.2.1/bin/mono $MONO_OPTIONS "/Library/Frameworks/Mono.framework/Versions/4.2.1/lib/mono/4.5/xsp4.exe" "<a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="dafe9a">[email protected]</a>"
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0