[Bug go/78525] New: use -O2 for "go build" by default

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78525

            Bug ID: 78525
           Summary: use -O2 for "go build" by default
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: trippels at gcc dot gnu.org
                CC: cmang at google dot com
  Target Milestone: ---

Currently "go build" builds binaries without any optimization.
This is in contrast to the official "go build" command, that optimizes by
default.

Wouldn't it make sense to add "-O2" (or even -O3) to the default gccgoflags?