cmd/go: -compiler=gccgo: -buildmode=c-archive can't produce an archive with statically linked libgo

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

Does this issue reproduce with the latest release?

Yes

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

What did you do?

What did you expect to see?

The program compiles and then executes without errors. This is what happens when using the standard "gc" compiler.

What did you see instead?

The created archive size is much smaller than archive created by "gc" (100634 vs 4876006 bytes on my machine). This clearly indicates that "-gccgoflags=-static-libgo" option got ignored.