Undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscall' and 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscallNoError'

[advancedwebdeveloper]

Hi.

I am experiencing such issues:

$make
/home/oceanfish81/coap-cli/vendor/golang.org/x/sys/unix/gccgo.go:53: error: undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscall'
/home/oceanfish81/coap-cli/vendor/golang.org/x/sys/unix/gccgo.go:28: error: undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscall'
/home/oceanfish81/coap-cli/vendor/golang.org/x/sys/unix/gccgo.go:21: error: undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscallNoError'
/home/oceanfish81/coap-cli/vendor/golang.org/x/sys/unix/gccgo.go:35: error: undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscall'
/home/oceanfish81/coap-cli/vendor/golang.org/x/sys/unix/gccgo.go:42: error: undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscall'
/home/oceanfish81/coap-cli/vendor/golang.org/x/sys/unix/gccgo.go:48: error: undefined reference to 'golang.x2eorg..z2fx..z2fsys..z2funix.realSyscallNoError'

I am using

$ go version
go version go1.15.2 gollvm LLVM 12.0.0git linux/amd64

with

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/oceanfish81/.cache/go-build"
GOENV="/home/oceanfish81/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/oceanfish81/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/oceanfish81/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/home/oceanfish81/gollvm_dist"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/home/oceanfish81/gollvm_dist/tools"
GCCGO="/home/oceanfish81/gollvm_dist/bin/llvm-goc"
AR="ar"
CC="/usr/bin/clang"
CXX="/usr/bin/clang++"
CGO_ENABLED="1"
GOMOD="/home/oceanfish81/coap-cli/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build992772685=/tmp/go-build -gno-record-gcc-switches -funwind-tables"

CC @ianlancetaylor @thanm @cherrymui

[advancedwebdeveloper]

@ianlancetaylor , isn't this related to golang/go#41758 ?

[drasko]

@advancedwebdeveloper please do not open issues here. It was mentioned many times that Mainflux does not have C bindings and is not using C at all.

[dborovcanin]

The problem seems to be related to LLVM or the Go compiler you are using (gollvm). This tool is written and compiled in the native Go compiler and you can find binaries for 3 platforms in the release assets (https://github.com/mainflux/coap-cli/releases/tag/v0.3.1).

[ianlancetaylor]

If CGO_ENABLED is set to 0 in the environment, then, yes, this is caused by golang/go#41758.

[dborovcanin]

Due to the reasons @drasko explained, CGO_ENABLED is disabled in this and all the other Mainflux tools.