You haven't said whether you followed the "safe" instructions for github.com/ugorji/go/codec to avoid building code/helper_unsafe.go, which uses go:linkname.
Package Documentation for github.com/ugorji/go/codec https://github.com/ugorji/go/blob/master/codec/README.md This package will carefully use 'package unsafe' for performance reasons in specific places. You can build without unsafe use by passing the safe or appengine tag i.e. 'go install -tags=codec.safe You can run the tag 'codec.safe' to run tests or build in safe mode. e.g. go test -tags codec.safe -run Json go test -tags "alltests codec.safe" -run Suite Peter On Monday, March 29, 2021 at 3:34:44 AM UTC-4 f011...@gmail.com wrote: > > go:linkname to refer directly to functions that are defined but not > exported by the standard library. > > This is not supported and is likely to break with any new release. It > evidently breaks with GoLLVM. > > Thanks for your attention, but I tried to write a demo with go:linkname. > In fact, it works well with gollvm...So maybe it is not the exact cause > for the problem > > Herei is my code: > > hello/hello.go > ``` > package hello > > import ( > "fmt" > _ "unsafe" > ) > //go:linkname hellox hello.hellox > func hellox(x string) { > fmt.Println(x) > } > ``` > > main.go > ``` > package main > > import ( > _ "mypackage/hello" > _ "unsafe" > ) > > //go:linkname hel hello.hellox > func hel(x string) > > func main() { > hel("aaa") > //println("aaaa") > } > ``` > > 在2021年3月29日星期一 UTC+8 上午12:37:49<Ian Lance Taylor> 写道： > >> On Sun, Mar 28, 2021 at 9:28 AM 张嘉熙 <f011...@gmail.com> wrote: >> > >> > For s2-geojson, I meet: >> > ``` >> > # github.com/pantrif/s2-geojson/cmd/s2-geojson >> > >> /home/jx/.cache/go-build/6b/6bd003c99eb0a9e7c6ea6d372307b292ec615c75c28f9b1f696896ae2fb4272b-d(_go_.o):gomodule:function >> >> github_0com_1ugorji_1go_1codec.intf2impls.intf2impl: error: undefined >> reference to 'reflect.unsafe_New' >> > >> /home/jx/.cache/go-build/6b/6bd003c99eb0a9e7c6ea6d372307b292ec615c75c28f9b1f696896ae2fb4272b-d(_go_.o):gomodule:function >> >> github_0com_1ugorji_1go_1codec.Decoder.interfaceExtConvertAndDecode: error: >> undefined reference to 'reflect.unsafe_New' >> > decode.go:509: error: undefined reference to 'reflect.unsafe_New' >> > decode.go:14935: error: undefined reference to 'reflect.unsafe_New' >> >> This is a problem with github.com/ugorji/go. The file >> code/helper_unsafe.go uses go:linkname to refer directly to functions >> that are defined but not exported by the standard library. This is >> not supported and is likely to break with any new release. It >> evidently breaks with GoLLVM. >> >> 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. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/f12e94e5-9968-48fb-9ce6-d9899a3796e2n%40googlegroups.com.
