Add instructions for macos support

[andrewdavidmackenzie]

now that flutter supports Mac OS, it would be great to include instructions for macos in the readme.

[andrewdavidmackenzie]

I've tried using all the usual instructionsn to enable mac os that work on other apps, it builds and tries to start but you get the "platform not supported" window shown.

[shekohex]

did you add the macOS for the codegen at build.rs?
Here for example you could configure the dart-bindgen so you could add more platforms:

flutterust/native/adder-ffi/build.rs

Lines 13 to 17 in 41ae6da

	let config = DynamicLibraryConfig {
	ios: DynamicLibraryCreationMode::Executable.into(),
	android: DynamicLibraryCreationMode::open("libadder_ffi.so").into(),
	..Default::default()
	};

on macOS you should just build using cargo build and it should generate .dylib file in the traget/debug.
but I guess better add the config in the Makefile.toml.

Feel free to open a PR!

[andrewdavidmackenzie]

I don't think I know enough about how all this works to do either of the options you mention, but I will keep looking into it...

something like:

    let config = DynamicLibraryConfig {
        ios: DynamicLibraryCreationMode::Executable.into(),
        android: DynamicLibraryCreationMode::open("libadder_ffi.so").into(),
        macos: DynamicLibraryCreationMode::open("libadder_ffi.dylib").into(),
        ..Default::default()
    };

and modifying native/adder_ffi/Cargo.toml (manually to get it working first time) to:

[lib]
name = "adder_ffi"
crate-type = ["dylib"]

Maybe?
(not working so far)

I also tried using the existing staticlib produced, with a reference to libadder_ffi.a in config, but no dice either.

Also tried:

[lib]
name = "adder_ffi"
crate-type = ["cdylib"]

[andrewdavidmackenzie]

I tried making the same Cargo.toml and build.rs modifications for scrap_ffi, then the error message change to:

even though the .dylib file is in target/debug..

So, enough trying in the dark for now - I may come back to this later.

[shekohex]

You are close now, just instead of using libscrap_ffi.dylib use the full path relative to the dart executable i.e ../trarget/debug/libsceap_ffi.dylib.

Unfortunately I don't own mac device right now (getting one soon), but once my hands on one I will try to add that.

Unless you figured it out before me 😉

[andrewdavidmackenzie]

:-(

[andrewdavidmackenzie]

Maybe if you can get one of the "desktops" supported by Flutter working, then I can copy and modify?
https://flutter.dev/desktop

[myway7]

I alse meet the same problem

[myway7]

Compiling adder-ffi v0.1.0 (/Users/admin/flutterust/native/adder-ffi)
error: failed to run custom build command for adder-ffi v0.1.0 (/Users/admin/flutterust/native/adder-ffi)

Caused by:
process didn't exit successfully: /Users/admin/flutterust/target/debug/build/adder-ffi-b63e74a431e464b0/build-script-build (signal: 6, SIGABRT: process abort signal)
--- stderr
dyld: Library not loaded: @rpath/libclang.dylib
Referenced from: /Users/admin/flutterust/target/debug/build/adder-ffi-b63e74a431e464b0/build-script-build
Reason: image not found
[cargo-make][1] ERROR - Error while executing command, exit code: 101
[cargo-make][1] WARN - Build Failed.
[cargo-make] ERROR - Error while executing command, exit code: 1
[cargo-make] WARN - Build Failed.

[shekohex]

Hey @fbenpao, you need LLVM.
see https://github.com/shekohex/flutterust#macos
install it: brew install llvm

[adamcypher]

I get dyld: Library not loaded: @rpath/libclang.dylib and I have LLVM installed.

[suyulin]

m1 chip mac mini:
dyld: Library not loaded: @rpath/libclang.dylib
I have LLVM installed.

[adamcypher]

dart_bindgen and/or it's usage in build.rs is the culprit for the dyld: Library not loaded: @rpath/libclang.dylib error.