Description of problem: golang seems to be using some cross-compiled components which are causing problems. Specifically, Fedora has exactly the problem described here: http://stackoverflow.com/questions/20609415/cross-compiling-user-current-not-implemented-on-linux-amd64 Here is the sample code from that page: package main import ( "fmt" "os/user" ) func main() { fmt.Println(user.Current()) } You can build the sample code and see the problem directly: $ go build ./current.go $ ./current <nil> user: Current not implemented on linux/amd64 Version-Release number of selected component (if applicable): golang-1.2.2-22.fc20.x86_64 How reproducible: Always
Here is a related upstream bug that describes this behavior: https://code.google.com/p/go/issues/detail?id=6376
If one downloads golang from golang.org (http://golang.org/dl/ the tar.gz "go1.4.1.linux-amd64.tar.gz", and use that, the bug is not there. This is a fedora build failure: wwalker@wwalker-desktop:~$ sudo tar -C /usr/local -xzf go1.3.3.linux-amd64.tar.gz wwalker@wwalker-desktop:~$ PATH=/usr/local/bin:$PATH wwalker@wwalker-desktop:~$ cd - /home/wwalker/golang_workspace/src/github.com/wwalker/hello wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ rm -rf ~/golang_workspace/pkg/* wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ rm -rf ~/golang_workspace/bin/* wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ go install wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ hello asdf wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ PATH=/usr/bin:$PATH wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ go install wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ hello asdf wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ rm -rf ~/golang_workspace/bin/* wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ rm -rf ~/golang_workspace/pkg/* wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ go install wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ hello user: Current not implemented on linux/amd64 wwalker@wwalker-desktop:~/golang_workspace/src/github.com/wwalker/hello$ rpm -q golang golang-1.3.3-1.fc21.x86_64
""" os/user relies on cgo, and cgo is disabled for cross compiling, thus this is expected. if you use os/user, you must compile natively on OS X. even if we enable cross compilation cgo support, I doubt everybody have a working OS X cross toolchain on their linux machine. """ Upstream issue closed as WorkingAsIntended.
ah, i see. this has to deal with the artifacts chosen by koji when the rpm is built across the arm, i386 and x86_64 builders. argh.
(To list a real-world impact:) this breaks build of https://github.com/docker/notary/blob/master/cmd/notary/main.go .
Can you test this on the go1.5 build that is in f23/f24(rawhide)?
http://koji.fedoraproject.org/koji/packageinfo?packageID=16224
Both claim to require a matching build of golang-src that doesn't exist. If I use --nodeps to install the f23 package on x86_64, the sample code builds and runs, printing out the expected contents of a User struct describing my logged-in user: &{1000 1000 nalin Nalin Dahyabhai /home/nalin} <nil>
This also breaks LXD (friendly LXC wrapper) on Fedora https://github.com/lxc/lxd/issues/830 Is there any workaround?
(In reply to Nalin Dahyabhai from comment #8) > Both claim to require a matching build of golang-src that doesn't exist. If > I use --nodeps to install the f23 package on x86_64, the sample code builds > and runs, printing out the expected contents of a User struct describing my > logged-in user: > &{1000 1000 nalin Nalin Dahyabhai /home/nalin} <nil> there are several rpms to update (golang, golang-bin, golang-src), not just a single rpm. Download them all, and `rpm -Uvh golang*rpm`.
Ah, they're noarch, so I missed them when downloading them with koji download-build. Same result: they work.
right, so go1.5 fixes this. Presently on f23 and rawhide. Soon we can roll this out safely to el6 and prior fedora releases.
go1.5 is in -testing for f21, f22 and el6
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Fix confirmed as of golang-1.5.1-0.fc22.x86_64.
Fedora 21 changed to end-of-life (EOL) status on 2015-12-01. Fedora 21 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.