Unable to build hello world: mono-wasm.cpp

[leriel]

Hello. I managed to build the compiler, up to the step where we compile hello world app from this repo. Running this step:

$ cd ~/src/mono-wasm/build
$ vi Makefile               # make sure the *_PATH variables point to proper locations, should be the case if you followed these instructions
$ make

i get some warnings and an error that makes me unable to build:

mono-wasm.cpp:173:52: warning: cast from 'const char *' to 'char *' drops const qualifier
      [-Wcast-qual]
    char *first_assembly = strdup(basename((char *)assembly_paths[0].c_str()));
                                                   ^
mono-wasm.cpp:358:53: error: too few arguments to function call, expected at least 4, have 3
                llvm::TargetMachine::CGFT_ObjectFile)) {
                                                    ^
/Users/jedrzejg/Work/mono-wasm/llvm/include/llvm/Target/TargetMachine.h:254:3: note:
      'addPassesToEmitFile' declared here
  virtual bool addPassesToEmitFile(PassManagerBase &, raw_pwrite_stream &,
  ^
mono-wasm.cpp:405:22: warning: cast from 'const char *' to 'char *' drops const qualifier
      [-Wcast-qual]
        free((char *)args[i + 1]);

I suppose this is caused by some sort of wrong version. Could you point me in the right direction?

I also noticed makefile uses clang we just built, except two cases for clang and clang++. However, when i replaced those with clang we just built, i am getting

mono-wasm.cpp:5:10: fatal error: 'mach/mach_time.h' file not found

One more thing, running $ ~/src/mono-wasm/llvm-build/bin/clang --version shows clang version 7 instead of 5 and no registered targets:

(~/Work/mono-wasm/build)
$ ../llvm-build/bin/clang --version
clang version 7.0.0 (trunk 335475) (llvm/trunk 335466)
Target: x86_64-apple-darwin17.6.0
Thread model: posix
InstalledDir: (...)/mono-wasm/build/../llvm-build/bin

Should i now target any specific branch for llvm svn repos?

$ svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
$ svn co http://llvm.org/svn/llvm-project/lld/trunk lld

Thanks in advance for any help.

[stefan-schweiger]

Everthing mono-wasm related was merged into the main mono repo.

See: #17

[leriel]

I should also mention that i didn't have VERSION env var which i added and set randomly to x86_64

[leriel]

@stefan-schweiger thanks! However the issues arise only when trying to build file from this repo. Should i link mono-wasm.cpp from this repo in the issue in mono repo ?

[stefan-schweiger]

@leriel this repo isn't maintained anymore. I also never got anything running with it. You should simply move on to the real mono repo (only caveat is that currently you can't do AOT with it).

[leriel]

I understand now - thanks!

[ArionTT]

it mean if I want to compile C# to WebAssembly, I just use mono respo to compile the C# file ??
I cann't understand what you mean....

[leriel]

@ArionTT just use Blazor project. https://github.com/aspnet/Blazor
There is overhead coming from Razor framework which you may not need, but with the ease of setup (blazor has dotnet project templates ready to go) it will save you insane amount of time.

Minimal bundle size for blazor is 1.9MB gzipped (as of 07.2018)