cc: error: unrecognized command-line option: '-arch'

[nuzzles]

For cross-compliation from Linux -> MacOS, I've tried compiling a simple crate only depending on wgpu and running cargo build --target x86_64-apple-darwin

I've also tried using cross for compilation and wgpu seems to be the only source of this issue. Apparently -arch is a CLI from Apple's version of GCC which is non standard and probably shouldn't be used if possible.

Here's what I always get,

   Compiling wgpu-core v0.13.2
The following warnings were emitted during compilation:

warning: cc: error: unrecognized command-line option ‘-arch’

error: failed to run custom build command for `objc_exception v0.1.2`

Caused by:
  process didn't exit successfully: `/home/simbleau/git/bevy-shell-template/target/debug/build/objc_exception-8d2f5636bf5ba727/build-script-build` (exit status: 1)
  --- stdout
  TARGET = Some("x86_64-apple-darwin")
  OPT_LEVEL = Some("0")
  HOST = Some("x86_64-unknown-linux-gnu")
  CC_x86_64-apple-darwin = None
  CC_x86_64_apple_darwin = None
  TARGET_CC = None
  CC = None
  CROSS_COMPILE = None
  CFLAGS_x86_64-apple-darwin = None
  CFLAGS_x86_64_apple_darwin = None
  TARGET_CFLAGS = None
  CFLAGS = None
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("true")
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2,sse3,ssse3")
  running: "cc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-m64" "-arch" "x86_64" "-Wall" "-Wextra" "-o" "/home/simbleau/git/bevy-shell-template/target/x86_64-apple-darwin/debug/build/objc_exception-e36d8c149665e96b/out/extern/exception.o" "-c" "extern/exception.m"
  cargo:warning=cc: error: unrecognized command-line option ‘-arch’
  exit status: 1

  --- stderr


  error occurred: Command "cc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-m64" "-arch" "x86_64" "-Wall" "-Wextra" "-o" "/home/simbleau/git/bevy-shell-template/target/x86_64-apple-darwin/debug/build/objc_exception-e36d8c149665e96b/out/extern/exception.o" "-c" "extern/exception.m" with args "cc" did not execute successfully (status code exit status: 1).

[teoxoy]

This doesn't seem to be an issue in wgpu, please open an issue over on the objc_exception repo (there seems to be one already opened that's related to cross compilation but I think it's different than this one).