CODEWITHSUNDEEP
.net-coreilasm
Alex
Alex

Reputation: 2609

Ilasm.exe injects mscorlib dependency in .NET Standard 2.0 dll

I'm building a .NET Core 2.0 library from IL. I earlier did exactly the same for .NET Core 1.0/1.1 with no issues. However, the same thing does not work for .NET Core 2.0 dll.

After running this:

C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe /OUTPUT=output.dll /nologo  /quiet /dll /resource=input.dll.res /ssver=6.0 input.dll.il

I'm getting this warning:

warning : Reference to undeclared extern assembly 'mscorlib'. Attempting autodetect

As a result, mscorlib does appear as dependency in the output.dll (and I don't want it to be there).

In the input.dll.il (and res file too), mscorlib is not mentioned at all (mscorlib string never appears in the file, I double-checked this):

//  Microsoft (R) .NET Framework IL Disassembler.  Version 4.6.1055.0
//  Copyright (c) Microsoft Corporation.  All rights reserved.

// Metadata version: v4.0.30319
.module extern 'advapi32'
.module extern 'kernel32'
.module extern 'Kernel32'
.module extern 'Ncrypt'
.module extern 'crypt32'
.module extern 'Crypt32'
.module extern 'secur32'
.assembly extern 'netstandard'
{
  .publickeytoken = (CC 7B 13 FF CD 2D DD 51 )                         // .{...-.Q
  .ver 2:0:0:0
}
.assembly extern 'Microsoft.Win32.Registry'
{
  .publickeytoken = (B0 3F 5F 7F 11 D5 0A 3A )                         // .?_....:
  .ver 4:1:0:0
}
.assembly 'MyLibrary'
{
...

I tried to copy netstandard.dll in the working folder with no effect. Maybe with .NET Core 2.0 a special version of ilasm.exe is needed? I'm using the one from .NET Framework 4.5 as I didn't find any ilasm in .NET Core 2.0 SDK (maybe I search in wrong places). Or what else could be the reason?

The only difference for .NET Core 1.0 (which worked fine) was that .assembly extern 'netstandard' was .assembly extern 'System.Runtime'.

Upvotes: 4

Views: 744

Answers (1)

mletterle
mletterle

Reputation: 3968

There is a related issue for the .NET Core ilasm (which presumably was forked from the full framework's): https://github.com/dotnet/coreclr/issues/10590

Upvotes: 2

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