On Fri, Dec 15, 2017 at 3:08 AM, Ally Dale <vipa...@gmail.com> wrote:
> Hi all,
> I just need a function to report the timestamp when my app compiled.
>
> func main() {
>
>
> unix := runtime.BuildTimestamp()
>
>
> t := time.Unix(unix, 0)
>
>
> println("hello world")
>
>
> println("buildtimestamp:", unix)
>
>
> println("buildtime :", t.String())
>
>
> // Output:
>
>
> // hello world
>
>
> // buildtimestamp: 1513329454
>
>
> // buildtime : 2017-12-15 17:17:34 +0800 CST
>
>
> }
>
>
>
> [runtime.BuildTimestamp()](https://github.com/vipally/go/blob/ally_build_time/src/runtime/symtab.go#L399)
> use a variable defined in
> [runtime.firstmoduledata.buildtimestamp](https://github.com/vipally/go/blob/ally_build_time/src/runtime/symtab.go#L372)
> which will be written by
> [cmd/link](https://github.com/vipally/go/blob/ally_build_time/src/cmd/link/internal/ld/symtab.go#L562)
>
> My trouble is, if cmd/link use time.Now().Unix() to get unix timestamp, it
> will make a new dependence of time for cmd/link.
> And this dependence will cause a STALE error when go_bootstrap building.
> go tool dist: unexpected stale targets reported by
> E:\go\pkg\tool\windows_amd64\go_bootstrap list -gcflags="" -ldflags=""
> for [cmd/asm cmd/cgo cmd/compile cmd/link runtime/internal/sys]:
> STALE cmd/asm: stale dependency: runtime/internal/atomic
> STALE cmd/cgo: stale dependency: runtime/internal/atomic
> STALE cmd/compile: stale dependency: runtime/internal/atomic
> STALE cmd/link: stale dependency: runtime/internal/atomic
> STALE runtime/internal/sys: build ID mismatch
>
>
> So, my question is, if I cannot use time.Now().Unix() or runtime.now() to
> get unix timestamp in cmd/link. How can I get unix timestamp in
> linker(cmd/link)?
Use something like -ldflags=-X=`VAR=date`. The -X option is
documented at https://golang.org/cmd/link.
Ian
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
