Running example on macOS (M1) issue

[uzador]

… grpc-rs % cargo xtask submodule                                                       
    Finished dev [unoptimized + debuginfo] target(s) in 0.11s
     Running `xtask/target/debug/xtask submodule`
HEAD is now at 996605a5e6 Merge pull request #48 from BusyJay/rs-release-1.46.5

… grpc-rs % cargo b
warning: patch for `grpcio-compiler` uses the features mechanism. default-features and features will not take effect because the patch dependency does not support this mechanism
    Finished dev [unoptimized + debuginfo] target(s) in 0.32s

… tests-and-examples % cargo r --example lb_greeter_server
warning: patch for `grpcio-compiler` uses the features mechanism. default-features and features will not take effect because the patch dependency does not support this mechanism
   Compiling tests-and-examples v0.1.0 (/Users/.../IdeaProjects/grpc-rs/tests-and-examples)
error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-arch" "arm64" "/var/folders/75/zhdmjhsd4svgjtv3281gbcxm0000gp/T/rustcP2Hfkf/symbols.o" "/Users/…/IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.157okt27ecsv5bux.rcgu.o" "/Users/…/IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.17yi5eg47dpffb9j.rcgu.o" "/Users/.../IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.18ianf0si9pat0dr.rcgu.o" "/Users/.../IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.19c42nkjalejthkd.rcgu.o" "/Users/.../IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.19culqfvobglxy9v.rcgu.o" "/Users/.../IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.1bm9k5p987b3c9ol.rcgu.o" "/Users/.../IdeaProjects/grpc-rs/target/debug/examples/lb_greeter_server-a63690b5afccce8d.1cobbob5dbvgp301.rcgu.o" 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  = note: ld: warning: directory not found for option '-L/Users/.../IdeaProjects/grpc-rs/target/debug/build/libz-sys-aa02c4250e7bfed2/out/build'
          Undefined symbols for architecture arm64:
            "_res_9_getservers", referenced from:
                _init_by_resolv_conf in libgrpcio_sys-03a1c8b58b5d0474.rlib(ares_init.c.o)
            "_res_9_ndestroy", referenced from:
                _init_by_resolv_conf in libgrpcio_sys-03a1c8b58b5d0474.rlib(ares_init.c.o)
            "_res_9_ninit", referenced from:
                _init_by_resolv_conf in libgrpcio_sys-03a1c8b58b5d0474.rlib(ares_init.c.o)
          ld: symbol(s) not found for architecture arm64
          clang: error: linker command failed with exit code 1 (use -v to see invocation)
          

error: could not compile `tests-and-examples` due to previous error
...@MacBook-Pro-MacBook tests-and-examples % 

My machine:

… % gcc --version
gcc (Homebrew GCC 12.2.0) 12.2.0
…
… % g++ --version
g++ (Homebrew GCC 12.2.0) 12.2.0
…
… % cmake --version
cmake version 3.24.2
…
.. % rustc --version
rustc 1.66.0-nightly (1898c34e9 2022-10-26)

...@MacBook-Pro-MacBook tests-and-examples % ld -v
@(#)PROGRAM:ld  PROJECT:ld64-819.6
BUILD 14:58:44 Aug  5 2022
configured to support archs: armv6 armv7 armv7s arm64 arm64e arm64_32 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em
LTO support using: LLVM version 14.0.0, (clang-1400.0.29.102) (static support for 29, runtime is 29)
TAPI support using: Apple TAPI version 14.0.0 (tapi-1400.0.11)

Could you pls advice what I did wrong?

[BusyJay]

I believe it's because nightly rustc introduce some minimal linking again. It should work with stable rust.

[uzador]

@BusyJay you are right! I even couldn't think that nightly version could break it :) Thanks!

[shaodan]

Got same error with Rust 1.66(current stable version)

[shaodan]

FYI: maybe this PR (included in 1.66 milestone) is related.