[sobe@xy go-43886-repro]$ cat zcc
#!/bin/sh
zig cc -target x86_64-windows-gnu $@
[sobe@xy go-43886-repro]$ cat zc++
#!/bin/sh
zig c++ -target x86_64-windows-gnu $@
[sobe@xy go-43886-repro]$ cat 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
}
[sobe@xy go-43886-repro]$ export PATH="$PATH:/home/sobe/zig/go-43886-repro"
[sobe@xy go-43886-repro]$ zig version
0.8.0-dev.1048+0cfa39304
[sobe@xy go-43886-repro]$ go version
go version go1.15.6 linux/amd64
[sobe@xy go-43886-repro]$ zcc
zig: error: no input files
[sobe@xy go-43886-repro]$ zc++
zig: error: no input files
[sobe@xy go-43886-repro]$ CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC="zcc" CXX="zc++" go build main.go
# command-line-arguments
warning: unsupported linker arg: --compress-debug-sections=zlib-gnu
[sobe@xy go-43886-repro]$ wine main.exe
wine: Unhandled page fault on write access to 0000000140106488 at address 0000000140139551 (thread 00f4), starting debugger...
Unhandled exception: page fault on write access to 0x140106488 in 64-bit code (0x0000000140139551).
Register dump:
 rip:0000000140139551 rsp:000000000111fd20 rbp:0000000000000000 eflags:00010297 (  R- --  I S -A-P-C)
 rax:0000000000800f11 rbx:0000000002100800 rcx:000000007ed8320b rdx:00000000178bfbff
 rsi:000000000000000d rdi:00000001400d5240  r8:00000000000150a0  r9:00000000014b1490 r10:00000000014b1390
 r11:00000000014b0138 r12:0000000000000000 r13:0000000000000000 r14:00000000014b1320 r15:0000000000000001
Stack dump:
0x000000000111fd20:  0000000000000000 0000000000000000
0x000000000111fd30:  0000000000000029 0000000000013e40
0x000000000111fd40:  0000000000013e40 000000014000192a
0x000000000111fd50:  0000000000000000 0000000000000000
0x000000000111fd60:  0000000000000000 0000000000000000
0x000000000111fd70:  0000000000000000 0000000000000000
0x000000000111fd80:  0000000000000000 0000000000000000
0x000000000111fd90:  0000000000000000 0000000000000000
0x000000000111fda0:  0000000000000000 0000000000000000
0x000000000111fdb0:  0000000000000000 0000000000000000
0x000000000111fdc0:  0000000000000000 0000000000000000
0x000000000111fdd0:  0000000000000000 0000000000000000
Backtrace:
=>0 0x0000000140139551 runtime.rt0_go+0x71() in main (0x0000000000000000)
0x0000000140139551 runtime.rt0_go+0x71 in main: movl    %eax,0xfffffffffffccf31(%rip)
Modules:
Module  Address                                 Debug info      Name (5 modules)
PE              6a080000-        6a10d000       Deferred        msvcrt
PE              7b000000-        7b0d4000       Deferred        kernelbase
PE              7b600000-        7b811000       Deferred        kernel32
PE              7bc00000-        7bc96000       Deferred        ntdll
PE             140000000-       140333000       PDB             main
Threads:
process  tid      prio (all id:s are in hex)
00000038 services.exe
        0000003c    0
        00000040    0
        0000004c    0
        00000070    0
        00000088    0
        000000b0    0
        000000d0    0
00000044 winedevice.exe
        00000048    0
        00000054    0
        00000058    0
        0000005c    0
00000060 plugplay.exe
        00000064    0
        00000074    0
        00000078    0
        0000007c    0
        00000098    0
00000068 explorer.exe
        0000006c    0
        000000bc    0
        000000c0    0
00000080 winedevice.exe
        00000084    0
        0000008c    0
        00000090    0
        00000094    0
        000000a0    0
        000000a4    0
000000a8 svchost.exe
        000000ac    0
        000000b4    0
        000000b8    0
000000c8 rpcss.exe
        000000cc    0
        000000d8    0
        000000dc    0
        000000e0    0
        000000e4    0
        000000e8    0
000000f0 (D) Z:\home\sobe\zig\go-43886-repro\main.exe
        000000f4    0 <==
000000f8 conhost.exe
        000000fc    0
System information:
    Wine build: wine-6.0
    Platform: x86_64
    Version: Windows 7
    Host system: Linux
    Host version: 5.10.8-arch1-1
[sobe@xy go-43886-repro]$