[Mono-dev] Microsoft.Build: The parameter 'FrameworkVersion45Path' was not found for the 'GetFrameworkPath' task

[Robin Neatherway]

Hi,

The small script I gave at the top is sufficient to observe the behaviour.
If you put it in a file, say "Script.fsx" and run it with `fsharpi
Script.fsx`, you will be able to reproduce the behaviour. Likewise for the
GetFrameworkPath fragment (once the DLLs have been loaded with #r). Would a
compilable version be more helpful?

I had another look in my lib/mono/4.5 directory and found that the
Microsoft.Build.* DLLs there are symlinks to the gac 4.0 versions:

  lib/mono/4.5 $ ls -l Microsoft.Build.*
lrwxrwxrwx 1   68 Jan 30 18:50 Microsoft.Build.dll ->
../gac/Microsoft.Build/4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.dll*
lrwxrwxrwx 1   82 Jan 30 18:50 Microsoft.Build.Engine.dll ->
../gac/Microsoft.Build.Engine/4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.Engine.dll*
lrwxrwxrwx 1   88 Jan 30 18:50 Microsoft.Build.Framework.dll ->
../gac/Microsoft.Build.Framework/4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.Framework.dll*
lrwxrwxrwx 1   90 Jan 30 19:26 Microsoft.Build.Tasks.v4.0.dll ->
../gac/Microsoft.Build.Tasks.v4.0/4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.Tasks.v4.0.dll*
lrwxrwxrwx 1   98 Jan 30 18:50 Microsoft.Build.Utilities.v4.0.dll ->
../gac/Microsoft.Build.Utilities.v4.0/4.0.0.0__b03f5f7f11d50a3a/Microsoft.Build.Utilities.v4.0.dll*

However the DLLs in lib/mono/4.0 are not symlinks, they are normal files.
The ones in the GAC are the same as those that are in class/lib/net_4_5/
after building, while the other files in lib/mono/4.0 are the same as those
in class/lib/net_4_0

Perhaps this is the source of the problem.

Robin


On Thu, Jan 31, 2013 at 3:29 PM, Marek Safar <marek.safar at gmail.com> wrote:

> Hi,
>
> This is most likely Mono bug in how we load Task libraries. It'll load the
> version from folder where Microsoft.Common.targets is which is incorrect in
> your case because it's 4.0 version and not 4.5. Some kind of self contained
> sample how F# is using Microsoft.Build* would be useful.
>
> Marek
>
>  I'm trying to execute the ResolveAssemblyReferences task using the
>> Microsoft.Build namespace. This (F#) project builds nicely from the command
>> line using xbuild, so the logic is capable. The project file can be found
>> here:
>> https://github.com/fsharp/fsharpbinding/blob/master/FSharp.AutoComplete/FSharp.AutoComplete.fsproj and
>> has TargetFrameworkVersion set to 4.5. If I change TargetFrameworkVersion
>> to 4.0, it works.
>>
>> I downloaded mono from github and am running the latest version: Mono JIT
>> compiler version 3.0.4 (master/e5fba9d Wed Jan 30 18:38:48 GMT 2013). I
>> also tried with 3.0.3, with the same effect.
>>
>> The following fsi script is what I am using:
>>
>> #r "Microsoft.Build.Engine"
>> #r "Microsoft.Build.Framework"
>> #r "Microsoft.Build.Tasks.v4.0"
>> open Microsoft.Build.BuildEngine
>> open Microsoft.Build.Framework
>> open Microsoft.Build.Tasks
>>
>> let p = new Project()
>> let cl = new ConsoleLogger(LoggerVerbosity.Diagnostic)
>> p.ParentEngine.RegisterLogger(cl)
>> p.Load("FSharp.AutoComplete.fsproj")
>>
>> p.Build([|"ResolveAssemblyReferences"|])
>>
>> which results in:
>>
>> <path>/FSharp.AutoComplete.fsproj (ResolveAssemblyReferences) ->
>> /home/scratch/local_mono/lib/mono/4.0/Microsoft.Common.targets
>> (GetFrameworkPaths target) ->
>>
>> /home/scratch/local_mono/lib/mono/4.0/Microsoft.Common.targets: error :
>> Error executing task GetFrameworkPath: The parameter
>> 'FrameworkVersion45Path' was not found for the 'GetFrameworkPath' task.
>>
>> I found that the framework path for 4.5 doesn't seem to be defined:
>>
>> let gfp = GetFrameworkPath()
>> gfp.FrameworkVersion45Path
>>
>> error FS0039: The field, constructor or member 'FrameworkVersion45Path'
>> is not defined
>>
>> Although in
>> mcs/class/Microsoft.Build.Tasks/Microsoft.Build.Tasks/GetFrameworkPath.cs
>> has a #if NET_4_5 around FrameworkVersion45Path, and .NET 4.5 is definitely
>> enabled in the configure script, and I have a fully populated lib/mono/4.5
>> directory.
>>
>> I also found that the Engine toolsets do not include 4.5. I tried adding
>> it manually, but this didn't help.
>>
>> I think this is a bug, and would appreciate any hints in tracking it down.
>>
>> Thanks,
>> Robin Neatherway
>>
>>
>> _______________________________________________
>> Mono-devel-list mailing list
>> Mono-devel-list at lists.ximian.com
>> http://lists.ximian.com/mailman/listinfo/mono-devel-list
>>
>>
>
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