Build failed on MacOS

[higumachan]

Hi I met build error on Mac OS. I looks some problem about LLVM. I want to help.

These are my scenario.

item	desc
OS	MacOS 10.14.6
OpenCV 4 directory	/usr/local/Cellar/opencv/4.3.0
opencv-rust features	buildtime-bindgen,contrib
How to install Opencv	brew install opencv
llvm directory	/usr/local/Cellar/llvm/7.0.1/

And, this is a my build log.

fail.log

thanks.

[twistedfall]

Are you using clang_sys with runtime feature enabled somewhere in your Cargo.toml or dependencies? That combination wasn't working for me in multithreaded generation so it's known to be broken at the moment.

[higumachan]

Thank you for response.

I look there doesn't seem to be a clang_sys with "runtime" feature dependency.

these are Cargo.toml files by I wrote.

[package]
name = "dobot-rs"
version = "0.1.0"
authors = ["higumachan <harekumo792154@gmail.com>"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

members = [
    "libdobot",
]

[dependencies]
libdobot = { path = "./libdobot" }
opencv = {version = "0.36", features = ["buildtime-bindgen"]}
tokio = { version = "0.2.21", features = ["full"] }

[package]
name = "libdobot"
version = "0.1.0"
authors = ["higumachan <harekumo792154@gmail.com>"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[build-dependencies]
bindgen = "^0.53"
cmake = "0.1"

[dependencies]
strum = "^0.18"
strum_macros = "^0.18"
tokio = { version = "^0.2", features = ["time"] }

[twistedfall]

Ah, it's bindgen, from its Cargo.toml:

[features]
default = [... "runtime" ...]
runtime = ["clang-sys/runtime"]

I'll see what can be done, but in the meanwhile you can do a quick fix, in the build.rs change line:

modules.par_iter().for_each(|module| {

to read:

modules.iter().for_each(|module| {

and in the binding-generator/Cargo.toml make the lines read:

clang = {version = "0.23", features = ["runtime", "clang_6_0"]}
clang-sys = {version = "0.28", features = ["runtime", "clang_6_0"]}

The build will be slower, but it should get past the generation phase.

[higumachan]

Thank you for response.

I have successfully built 🎉

Can I contribute this way? My idea is add nonparallel feature.

[twistedfall]

Yes, please do! But please call the feature clang-runtime. Because it’s not about being parallel (there are other still other parts that are done in parallel), but about compatibility with clang.

[higumachan]

OK! I will implement new feature call by clang-runtime.

Please wait a few days. thanks.

[twistedfall]

Thank you!