cmd/link: go install of shared std fails

[jcajka]

What version of Go are you using (go version)?

$ go version
go version devel +e92be18fd8 Wed Jun 10 14:56:01 2020 +0000 linux/s390x
go version devel +968e18eebd Tue Jun 23 00:10:24 2020 +0000 linux/s390x

Observed both on master and go1.15beta1

Does this issue reproduce with the latest release?

No, go1.14.x doesn't seems to be affected.

What operating system and processor architecture are you using (go env)?

Observed both on linux/amd64 and linux/s390x. I would assume that all linux/* are affected.
For the record that is with gcc-10.1.1 and binutils-2.34(should these have any impact).

What did you do?

go install --buildmode=shared std

What did you expect to see?

Install finishing successfully, creating the libstd.so.

What did you see instead?

#go install --buildmode=shared std
# /tmp/go-build251444969/b203/libstd.so
/root/jcajka/go/pkg/tool/linux_s390x/link: fingerprint mismatch: errors has 0000000000000000, import from archive/tar expecting 1cce8eaa5db90f7e

[dmitshur]

Thank you for testing beta 1 and reporting this.

I'm not sure if this is a problem, and if so, where the problem is, but the error is coming from the linker, so that might be involved. /cc @aclements @cherrymui

/cc @cagedmantis @toothrot

[thanm]

This does appear to be reproducible on our s390x gomote.

[gopherbot]

Change https://golang.org/cl/239517 mentions this issue: cmd/link: skip zero values in fingerprint check

[jcajka]

Thank you for quick fix.