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"zig cc" doesn't work with cgo (golang) #7342

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@lu4p

Description

@lu4p

I would like to use "zig cc" for easily cross compiling cgo dependent go code, however the "drop-in" c compiler replacement doesn't work.

Example cgo code

main.go

package main

//int Add(int a, int b){
//    return a+b;
//}
import "C"
import "fmt"

func main() {
	a := C.int(10)
	b := C.int(20)
	c := C.Add(a, b)
	fmt.Println(c) // 30
}

other compilers

go build main.go //build works fine (uses gcc)
CC="clang" go build main.go //build works fine (uses clang)

zig cc

$ CC="zig cc" go build main.go
# runtime/cgo
info: Usage: zig [command] [options]

Commands:

  build            Build project from build.zig
  build-exe        Create executable from source or object files
  build-lib        Create library from source or object files
  build-obj        Create object from source or assembly
  cc               Use Zig as a drop-in C compiler
  c++              Use Zig as a drop-in C++ compiler
  env              Print lib path, std path, compiler id and version
  fmt              Parse file and render in canonical zig format
  init-exe         Initialize a `zig build` application in the cwd
  init-lib         Initialize a `zig build` library in the cwd
  libc             Display native libc paths file or validate one
  run              Create executable and run immediately
  translate-c      Convert C code to Zig code
  targets          List available compilation targets
  test             Create and run a test build
  version          Print version number and exit
  zen              Print zen of zig and exit

General Options:

  --help           Print command-specific usage

error: unknown command: -E
go version go1.15.5 linux/amd64

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    downstreamAn issue with a third party project that uses Zig.zig ccZig as a drop-in C compiler feature

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