[Wasm] AOT .NET7 Compiling error

[giraudremy]

Hi,

I'm try compile my wasm projet targetting .NET 7 with aot support enabled. I'm using docker image configured like
https://github.com/unoplatform/docker/blob/master/wasm-build/Dockerfile

I have found the following error in log file :

     [00:05:03.3969659] [1017/1036] [EMCC] Uno.UI.dll.bc -> Uno.UI.dll.o
     [00:05:03.3970323] FAILED: Uno.UI.dll.o
     [00:05:03.3970355] bash -c "source ./emsdk_env.sh && PYTHONUTF8=1 LC_ALL=C.UTF-8 emcc -DENABLE_METADATA_UPDATE=1 -s USE_ZLIB=1 -s FORCE_FILESYSTEM=1  -fwasm-exceptions -DGEN_PINVOKE -I/tmp/dotnet-runtime-wasm-linux-633c7b6-0cee4aaff9c-3338312971-Release/runtimes/browser-wasm/native -emit-llvm  --profiling -l idbfs.js    -Oz -c -o Uno.UI.dll.o Uno.UI.dll.bc"
     [00:05:03.3970404] emcc: warning: linker setting ignored during compilation: 'FORCE_FILESYSTEM' [-Wunused-command-line-argument]
     [00:05:03.3970423] clang-15: warning: argument unused during compilation: '-I /tmp/dotnet-runtime-wasm-linux-633c7b6-0cee4aaff9c-3338312971-Release/runtimes/browser-wasm/native' [-Wunused-command-line-argument]
     [00:05:03.3970803] emcc: error: '/root/.uno/emsdk/emsdk-3.1.12/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -DEMSCRIPTEN -D__EMSCRIPTEN_major__=3 -D__EMSCRIPTEN_minor__=1 -D__EMSCRIPTEN_tiny__=12 -fno-inline-functions -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr -Werror=implicit-function-declaration -Xclang -iwithsysroot/include/SDL --sysroot=/root/.uno/emsdk/emsdk-3.1.12/emsdk/upstream/emscripten/cache/sysroot -Xclang -iwithsysroot/include/compat -DENABLE_METADATA_UPDATE=1 -fwasm-exceptions -DGEN_PINVOKE -I/tmp/dotnet-runtime-wasm-linux-633c7b6-0cee4aaff9c-3338312971-Release/runtimes/browser-wasm/native -emit-llvm -Oz -c Uno.UI.dll.bc -o Uno.UI.dll.o' failed (received SIGKILL (-9))

Any idea to fixe that ?

Thank

[jeromelaban]

Thanks for the report. This is generally caused by out of memory conditions, make sure your environment has enough available memory to finish compiling.

[giraudremy]

Thank for reply. The machine have only 8go of memory.

I have try on my dev machine on windows machine with 32go of memory but I have other issue like this :

7> [00:00:03.2292709] dotnet 'C:/Program Files/dotnet/sdk/7.0.100/Sdks/Microsoft.NET.ILLink.Tasks/build/../tools/net472/../net7.0/illink.dll' '@/mnt/c/Dev/GameClient.Wasm/obj/Release/net7.0/workAot/linker.rsp'
7> [00:00:03.2292927] Could not execute because the specified command or file was not found.
7> [00:00:03.2292969] Possible reasons for this include:
7> [00:00:03.2292990] * You misspelled a built-in dotnet command.
7> [00:00:03.2293007] * You intended to execute a .NET program, but dotnet-C:/Program Files/dotnet/sdk/7.0.100/Sdks/Microsoft.NET.ILLink.Tasks/build/../tools/net472/../net7.0/illink.dll does not exist.
7> [00:00:03.2293024] * You intended to run a global tool, but a dotnet-prefixed executable with this name could not be found on the PATH.

I don't no why it use C:/Program Files/ and not @/mnt/c/Program Files like the second path in command line...

[jeromelaban]

Thanks. This is a interesting issue. Could you tell me if the file C:/Program Files/dotnet/sdk/7.0.100/Sdks/Microsoft.NET.ILLink.Tasks/tools/net7.0/illink.dll exists on your system ?

[giraudremy]

Yes the file exists on my system

[jeromelaban]

I also see that you're building with WSL enabled, which is not the default. Can you disable that feature that you probably added explicitly in your csproj?

[giraudremy]

Thank for your help.

Yes I use WSL because when I was using the .NET7 preview, that's the only way I can compile (see unoplatform/uno#8741).

Without WSL I have another error ([00:01:47.7647886] FAILED: aot-instances.dll.bc.tmp), see the binlog.
msbuild.binlog.zip

Otherwise, with docker on my windows machine, I was able to compile my project. The compilation run into 2 hours and consumed about 20 gigabytes of ram.

[jeromelaban]

I see, it indeed makes sense, let's track in #670. For the build time, you change the optimization options here.