[android] $(EnableLLVM) started failing in .NET 6 rc1

[jonathanpeppers]

Description

• dotnet new android
• dotnet build -c Release -p:RunAOTCompilation=true -p:EnableLLVM=true

Fails with:

Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\System.Runtime.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll-llvm.o.tmp
Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\UnnamedProject.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\UnnamedProject.dll-llvm.o.tmp
Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\System.Console.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Console.dll-llvm.o.tmp
Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\System.Linq.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Linq.dll-llvm.o.tmp
Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\Java.Interop.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\Java.Interop.dll-llvm.o.tmp
Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\Mono.Android.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\Mono.Android.dll-llvm.o.tmp
Microsoft.Android.Sdk.Aot.targets(75,5): Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\System.Private.CoreLib.dll. Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Private.CoreLib.dll-llvm.o.tmp

Configuration

> dotnet --version
6.0.100-rc.1.21419.4

Regression?

This was working in previous builds of .NET 6 rc.1 and preview.7.

Other information

I noticed a recent change to llvm-outfile, so it could caused by: 3e3b00c

Let me know if we are doing something wrong, or if there is a workaround. Thanks!

Log: msbuild.zip

/cc @radical

[radical]

Where is the source for this targets file? The logs suggest that the MonoAOTCompiler task is being used with the new CacheFilePath parameter, but I don't see it in https://github.com/xamarin/xamarin-android/blob/release/6.0.1xx-rc1/src/Xamarin.Android.Build.Tasks/Microsoft.Android.Sdk/targets/Microsoft.Android.Sdk.Aot.targets . Or on main.

C:\Users\jopepper\android-toolchain\dotnet\packs\Microsoft.Android.Sdk.Windows\30.0.100-ci.darc-release-6-0-1xx-rc1-f9a4256b-7422-464c-8c79-a2aee92dc0d0.145\targets\Microsoft.Android.Sdk.Aot.targets(75,5):\

Precompiling failed for C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked\System.Runtime.dll.

Could not find output file C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll-llvm.o.tmp [C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\UnnamedProject.csproj]

The command line has ,llvm-outfile=C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll-llvm.o.tmp. Should the file be expected to exist?

[jonathanpeppers]

Sorry, I added CacheFilePath locally to see if it changed anything. Here is a log without that:

nocachefile.zip

Here is a log from xamarin-android/main:

working.zip

Seems like the file used to not have .tmp on the end:

[System.Runtime.dll] Exec (with response file contents expanded) in C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked: MONO_PATH=C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\linked; MONO_ENV_OPTIONS= C:\Users\jopepper\android-toolchain\dotnet\packs\Microsoft.NETCore.App.Runtime.AOT.win-x64.Cross.android-arm64\6.0.0-rc.1.21417.1\Sdk\..\tools\mono-aot-cross.exe --debug --llvm "--aot=no-write-symbols,asmwriter,mtriple=aarch64-linux-android,tool-prefix=C:\Users\jopepper\android-toolchain\ndk\toolchains\llvm\prebuilt\windows-x86_64\bin\aarch64-linux-android-,ld-name=ld.gold,ld-flags=-LC:\Users\jopepper\android-toolchain\ndk\toolchains\llvm\prebuilt\windows-x86_64\lib\gcc\aarch64-linux-android\4.9.x -LC:\Users\jopepper\android-toolchain\ndk\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\lib\aarch64-linux-android\21 C:\Users\jopepper\android-toolchain\ndk\toolchains\llvm\prebuilt\windows-x86_64\lib\gcc\aarch64-linux-android\4.9.x\libgcc.a C:\Users\jopepper\android-toolchain\ndk\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\lib\aarch64-linux-android\21\libc.so C:\Users\jopepper\android-toolchain\ndk\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\lib\aarch64-linux-android\21\libm.so,temp-path=C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\arm64-v8a\System.Runtime,nodebug,llvm-path=C:\Users\jopepper\android-toolchain\dotnet\packs\Microsoft.NETCore.App.Runtime.AOT.win-x64.Cross.android-arm64\6.0.0-rc.1.21417.1\Sdk\..\tools,outfile=C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll.so,llvm-outfile=C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll-llvm.o" "System.Runtime.dll"

We started seeing this failure on either of these:

• [main] Update dependencies from dotnet/installer android#6204
• [release/6.0.1xx-rc1] Update dependencies from dotnet/installer android#6205

[radical]

It's failing to find C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll-llvm.o

The command line has:
llvm-outfile=C:\src\xamarin-android\bin\TestDebug\temp\NoSymbolsArgShouldReduceAppSize\obj\Release\android-arm64\aot\System.Runtime.dll-llvm.o. Should it not expect to find that file? In the working case, do you have that file?

cc @vargaz

I'll fix the task to check for this only in case of the cache being used, so it won't trigger for Android. But whenever you will try to use it, we'll hit this.