use ant version 1.9.8 as 1.9.7 is no longer available at ibiblio

[radekdoulik]

No description provided.

[jonpryor]

The fix is good, but the PR builder isn't building it. It looks like a Cecil mismatch:

LocationProvider.cs(75,16): error CS1061: Type `Mono.Cecil.MethodDefinition' does not contain a definition for `DebugInformation' and no extension method `DebugInformation' of type `Mono.Cecil.MethodDefinition' could be found. Are you missing an assembly reference?

The full log contains the build command:

Tool /Library/Frameworks/Mono.framework/Versions/4.4.2/lib/mono/4.5/mcs.exe execution started with arguments: /noconfig /out:obj/Debug/mono-symbolicate.exe LocationProvider.cs SeqPointInfo.cs symbolicate.cs Logger.cs StackFrameData.cs SymbolManager.cs ../../class/Mono.Options/Mono.Options/Options.cs obj/Debug/.NETFramework,Version=v4.5.AssemblyAttribute.cs /target:exe /nostdlib /reference:/Library/Frameworks/Mono.framework/Versions/4.4.2/lib/mono/4.5-api/System.dll /reference:/Library/Frameworks/Mono.framework/Versions/4.4.2/lib/mono/4.5-api/Mono.Cecil.dll /reference:/Library/Frameworks/Mono.framework/Versions/4.4.2/lib/mono/4.5-api/Mono.Cecil.Mdb.dll /reference:/Library/Frameworks/Mono.framework/Versions/4.4.2/lib/mono/4.5-api/System.Core.dll /reference:/Library/Frameworks/Mono.framework/Versions/4.4.2/lib/mono/4.5-api/mscorlib.dll

which is clearly using the system Mono.Cecil.dll, while building external/mono/mcs/tools/mono-symbolicate, which will be using the mono-bundled Cecil, not the system Cecil.

I'm not at all sure why this didn't break before, or why this particular PR is triggering an issue.

That said:

1. Earlier today, @dellis1972 ran across a similar issue. Perhaps he has a fix?
2. I'd like to get this underlying Cecil issue fixed before merging any other PRs, as I don't want a failing Jenkins build if we can avoid id.

[dellis1972]

@jonpryor I'm working on the build issue. It is a result of a PR that was already merged [1], for some reason it builds ok occasionally on Jenkins... which is totally weird. I think its dependent on which system mono is installed. I have 4.8 installed and I get the same error locally.

[1] #335

[jonpryor]

build