[Bug go/63539] New: libgo does not use the newly built objcopy when doing a combined build

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63539

            Bug ID: 63539
           Summary: libgo does not use the newly built objcopy when doing
                    a combined build
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: pinskia at gcc dot gnu.org
                CC: cmang at google dot com

I was trying build a go compiler for aarch46 and ran into this issue.

I was doing a full combined build with all of GCC/binutils from the trunk.

f=`echo container/ring.lo | sed -e 's/.lo$/.o/'`; objcopy -j .go_export $f
container/ring.gox.tmp && mv -f container/ring.gox.tmp container/ring.gox
objcopy: Unable to recognise the format of the input file `container/ring.o'


In this case container/ring.o is an aarch64 elf binary and my host objcopy
(2.20) does not understand aarch64 elf files.