Hi Stephan,
I've attempted to statically link C# assemblies into F# and found the process harrowing. It seems that --static-link fails when there is more than a single unmanaged resource in the dependent assemblies. I did get a combination of ILMerge and --standalone to create a standalone executable linking to a C# assembly.
Unfortunately general use of ILMerge with F# causes a strange namespace to be created with duplicate names defined A, B, C, D, E etc. This causes the resultant assembly not to load. I reported this to the author of ILMerge a while back and ask you to do the same if you run into the this problem.
ILMerge is actually very easy to use programmatically. With the new post-build step you could include this as a project and run it to merge your assemblies after they have been built. Here's an example bit of code.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
module Tools.AssemblyMerge.Main #light #R "../lib/ILMerge.exe" open System open ILMerging let proc = new FileInfo(Process.GetCurrentProcess().MainModule.FileName) Environment.CurrentDirectory <- proc.DirectoryName let outputFile = "../Tools.AssemblyMerge/XmlDiffPatchMerge.dll" let inputAssemblies = [|"../lib/XmlDiffPatch.dll"; "../lib/XmlDiffPatch.View.dll" |] let mergeAssemblies () = let il = new ILMerge(TargetKind= ILMerge.Kind.Dll, OutputFile=outputFile) il.SetInputAssemblies inputAssemblies try il.Merge(); write "<Message Content='Merge complete.'/>" with e -> failwithf "<Error Content='Merge failed with %s'/>" e.Message do mergeAssemblies ()
I do hope static linking and --standalone continues to improve toward v2.0.
regards,
Danny
btw - Great work with FParsec!! Looking forward to the next release...
Hi Danny,
Thanks for your informative comments. As things are I'll probably just stick to the two DLLs solution until there's better support for merging assemblies.
Stephan
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Hi,
I'm currently preparing a new release of FParsec compatible with the F# CTP release. For ease of use I'm planning to include a pre-built DLL. If possible, I'd like to combine the two separate DLLs (one with the C# code and one with the F# code) into one DLL. The first thing I tried was statically linking the C# library into the F# library (with the fsc option "--staticlink"), but that doesn't work because clients of the library then can't use types defined in C# library. Another option would be .netmodules, but they don't yet seem to be supported by the F# VS plugin. Another alternative would be to use ilmerge, though that would make the build process significantly more complicated.
Does anybody have experience with ilmerge in the context of mixing C# and F# code? Is it safe? Is there any other way to merge C# and F# code into one assembly?
Thanks for any hint,
Stephan