[NativeAOT] IlcCompileInput ignores ILLink output when RunILLink=true

[sbomer]

ComputeIlcCompileInputs in Microsoft.NETCore.Native.targets sets IlcCompileInput from @(IntermediateAssembly). When RunILLink=true and ILLink runs before ILC, the main assembly in $(IntermediateLinkDir) may differ from IntermediateAssembly (e.g. due to pre-trimming assembly rewrites). ILC compiles the wrong assembly, causing runtime failures.

The default NativeAOT flow has RunILLink=false so this does not arise. Android sets RunILLink=true to run custom ILLink steps before ILC.

Workaround:

Override IlcCompileInput after ComputeIlcCompileInputs:

<IlcCompileInput Remove="@(IlcCompileInput)" />
<IlcCompileInput Include="$(IntermediateLinkDir)$(TargetName)$(TargetExt)" />

Related: dotnet/android#11183

This content was created with assistance from AI.

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