On Thu, Jan 5, 2017 at 5:42 AM, Kedar Babar <kedartba...@gmail.com> wrote:
>
> I had written a small go program, which refers the 'C' code, following
> is the snippet
>
> package main
>
> /*
> #include <netdb.h>
> */
> import "C"
> import "fmt"
>
> const cgoAddrInfoFlags = (C.AI_CANONNAME | C.AI_V4MAPPED | C.AI_ALL) &
> C.AI_MASK
>
> func main() {
> fmt.Println("Hello")
> }
>
> When i build the above program, i get the below linking errors for the
> target darwin/amd64.
> /usr/lib/go-1.6/pkg/tool/linux_amd64/link: running o64-clang failed: exit
> status 1
> ld: warning: ignoring file /tmp/go-link-601229876/000001.o, file was built
> for unsupported file format ( 0x7F 0x45 0x4C 0x46 0x02 0x01 0x01 0x00 0x00
> 0x00 0x00 0x00 0x00 0x00 0x00 0x00 ) which is not the architecture being
> linked (x86_64): /tmp/go-link-601229876/000001.o
> Undefined symbols for architecture x86_64:
> "__cgo_wait_runtime_init_done", referenced from:
> _callbackTrampoline in 000000.o
> _stepTrampoline in 000000.o
> _doneTrampoline in 000000.o
> "_x_cgo_free", referenced from:
> __cgo_free in go.o
> "_x_cgo_init", referenced from:
> __cgo_init in go.o
> "_x_cgo_malloc", referenced from:
> __cgo_malloc in go.o
> "_x_cgo_notify_runtime_init_done", referenced from:
> __cgo_notify_runtime_init_done in go.o
> "_x_cgo_setenv", referenced from:
> runtime._cgo_setenv in go.o
> "_x_cgo_thread_start", referenced from:
> __cgo_thread_start in go.o
> "_x_cgo_unsetenv", referenced from:
> runtime._cgo_unsetenv in go.o
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> Following is the go command used to build the above stuff.
> env CGO_ENABLED=1 GOOS=darwin GOARCH=amd64 CC=o64-clang go build -x -work
> -ldflags="-extld=o64-clang"
I don't know what the problem is, but the first step is to look at the
direct invocations of the C compiler in the `go build -x` output and
make sure that they look right. Make sure that nothing is calling
"gcc" directly. Make sure that the invocations of "o64-clang" have
any required flags.
Ian
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