Go 1.4.3 failing on core-updates

Go 1.4.3 failing on core-updates

[Leo Famulari]

Go version 1.4.3, which is required to build the latest Go version, is
failing to build on core-updates:

https://hydra.gnu.org/build/1493335

Here's the tail of the log:
------
archive/tar
go/doc
crypto/elliptic
cmd/addr2line
encoding/asn1
crypto/rand
crypto/dsa
cmd/cgo
go/format
crypto/rsa
cmd/fix
cmd/gofmt
go/build
crypto/ecdsa
crypto/x509/pkix
cmd/nm
cmd/objdump
cmd/pprof/internal/plugin
html/template
cmd/pprof/internal/symbolizer
cmd/pprof/internal/symbolz
cmd/yacc
archive/zip
cmd/pprof/internal/report
compress/lzw
compress/zlib
database/sql/driver
database/sql
encoding/csv
encoding/gob
image/gif
image/png
runtime/debug
testing
testing/iotest
cmd/pprof/internal/commands
testing/quick
text/scanner
cmd/pprof/internal/driver
runtime/cgo
net
os/user
# net
cannot load DWARF output from $WORK/net/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
# os/user
cannot load DWARF output from $WORK/os/user/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
phase `build' failed after 15.9 seconds
builder for `/gnu/store/gs9r320hhlmi87k3xbswng57icxsxv4n-go-1.4.3.drv' failed with exit code 1
@ build-failed /gnu/store/gs9r320hhlmi87k3xbswng57icxsxv4n-go-1.4.3.drv - 1 builder for `/gnu/store/gs9r320hhlmi87k3xbswng57icxsxv4n-go-1.4.3.drv' failed with exit code 1
guix build: error: build failed: build of `/gnu/store/gs9r320hhlmi87k3xbswng57icxsxv4n-go-1.4.3.drv' failed
------

Any ideas?

Re: Go 1.4.3 failing on core-updates

[Andy Wingo]

On Sat 15 Oct 2016 22:12, Leo Famulari <leo@famulari.name> writes:

> # net
> cannot load DWARF output from $WORK/net/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
> # os/user
> cannot load DWARF output from $WORK/os/user/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0

Probably this is due to a version change in GCC or the toolchain -- this
part of go is designed to interoperate with GCC in some way.  Try fixing
the version of the toolchain to something older, perhaps?

Andy

Re: Go 1.4.3 failing on core-updates

[Leo Famulari]

On Mon, Oct 17, 2016 at 10:23:08AM +0200, Andy Wingo wrote:
> On Sat 15 Oct 2016 22:12, Leo Famulari <leo@famulari.name> writes:
> 
> > # net
> > cannot load DWARF output from $WORK/net/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
> > # os/user
> > cannot load DWARF output from $WORK/os/user/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
> 
> Probably this is due to a version change in GCC or the toolchain -- this
> part of go is designed to interoperate with GCC in some way.  Try fixing
> the version of the toolchain to something older, perhaps?

It turns out that Go 1.4.3's cgo (the Go interface to C code) doesn't
work with Binutils > 2.27:

https://github.com/golang/go/issues/16906

We are still able to use Go 1.4.3 to bootstrap later versions of Go if
we disable cgo, as I did in 04a95a4fd66.

Re: Go 1.4.3 failing on core-updates

[Ludovic Courtès]

Leo Famulari <leo@famulari.name> skribis:

> On Mon, Oct 17, 2016 at 10:23:08AM +0200, Andy Wingo wrote:
>> On Sat 15 Oct 2016 22:12, Leo Famulari <leo@famulari.name> writes:
>> 
>> > # net
>> > cannot load DWARF output from $WORK/net/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
>> > # os/user
>> > cannot load DWARF output from $WORK/os/user/_obj//_cgo_.o: decoding dwarf section info at offset 0x4: unsupported version 0
>> 
>> Probably this is due to a version change in GCC or the toolchain -- this
>> part of go is designed to interoperate with GCC in some way.  Try fixing
>> the version of the toolchain to something older, perhaps?
>
> It turns out that Go 1.4.3's cgo (the Go interface to C code) doesn't
> work with Binutils > 2.27:
>
> https://github.com/golang/go/issues/16906
>
> We are still able to use Go 1.4.3 to bootstrap later versions of Go if
> we disable cgo, as I did in 04a95a4fd66.

Great, thanks!

Ludo’.