i cant install gonum to my project

[jorgeneo560]

when i try

go get -u gonum.org/v1/gonum/...

it says installing modules via get is deprecated and use go install instead, what i should do?

[Sebastien Binet]

hi,

could you post what you did (what Go version BTW?) and what happened?

also, if you could post a link to your code or repository, that would
help :)

cheers,
-s

[jorgeneo560]

using the lastes version of go and vs code
i am getting this

go get: installing executables with 'go get' in module mode is deprecated.

        Use 'go install pkg@version' instead.

        For more information, see https://golang.org/doc/go-get-install-deprecation

        or run 'go help get' or 'go help install'.

[Sebastien Binet]

On Mon Oct 11, 2021 at 14:36 CET, 'jorgeneo560' via gonum-dev wrote:
> using the lastes version of go and vs code
> i am getting this
>
> go get: installing executables with 'go get' in module mode is
> deprecated.
> Use 'go install pkg@version' instead.
> For more information, see
> https://golang.org/doc/go-get-install-deprecation
> or run 'go help get' or 'go help install'.

from within the top-level directory of your project, could you run:

$> go version
$> go env
$> go install -v -u gonum.org/v1/gonum
$> go mod tidy
$> go install ./...

and report back?

hth,
-s

[jorgeneo560]

PS D:\GO\test> go version

go version go1.17.1 windows/amd64

PS D:\GO\test> go env

set GO111MODULE=

set GOARCH=amd64

set GOBIN=

set GOCACHE=C:\Users\margarita\AppData\Local\go-build

set GOENV=C:\Users\margarita\AppData\Roaming\go\env

set GOEXE=.exe

set GOEXPERIMENT=

set GOFLAGS=

set GOHOSTARCH=amd64

set GOHOSTOS=windows

set GOINSECURE=

set GONOPROXY=

set GONOSUMDB=

set GOOS=windows

set GOPRIVATE=

set GOROOT=C:\Program Files\Go

set GOTMPDIR=

set GOTOOLDIR=C:\Program Files\Go\pkg\tool\windows_amd64

set GOVCS=

set GOVERSION=go1.17.1

set GCCGO=gccgo

set AR=ar

set CC=gcc

set CXX=g++

set CGO_ENABLED=1

set GOMOD=NUL

set CGO_CFLAGS=-g -O2

set CGO_CPPFLAGS=

set CGO_CXXFLAGS=-g -O2

set CGO_FFLAGS=-g -O2

set CGO_LDFLAGS=-g -O2

set PKG_CONFIG=pkg-config

set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\MARGAR~1\AppData\Local\Temp\go-build2737645176=/tmp/go-build -gno-record-gcc-switches

PS D:\GO\test> go install -v -u gonum.org/v1/gonum

flag provided but not defined: -u

usage: go install [build flags] [packages]

Run 'go help install' for details.

PS D:\GO\test> go mod tidy

go: go.mod file not found in current directory or any parent directory; see 'go help modules'    

PS D:\GO\test> go install ./...

go: go.mod file not found in current directory or any parent directory; see 'go help modules'   

[Sebastien Binet]

Jorge,

you use Go-1.17.x
as far as I know, this version of Go requires that you work in "module
mode".

if you go back under your GO/test directory and do something along the
lines of:

====
$> go version
go version go1.17.2 linux/amd64

$> mkdir -p /tmp/jorge/GO/test
$> cd /tmp/jorge/GO/test
$> go mod init mymodule
go: creating new go.mod: module mymodule

$> cat go.mod
module mymodule

go 1.17

$> go get -u -v gonum.org/v1/gonum
gonum.org/v1/gonum
go get: added gonum.org/v1/gonum v0.9.3

$> cat go.mod
module mymodule

go 1.17

require gonum.org/v1/gonum v0.9.3 // indirect

$> cat > main.go << EOF
package main

import _ "gonum.org/v1/gonum"

func main() {
println("hello gonum")
}
EOF

$> go build -o hello ./main.go
$> ./hello
hello gonum
===

everything should work.

hth,
-s