Installation with static libs fails

[DarkiT]

Description

I have a pretty much clean Ubuntu 20.04 environment where I want to run gocv. The normal installation runs fine, but if I try to run it with BUILD_SHARED_LIBS=OFF the installation fails with

root@53ee82285d3a:/go/gocv# go build -tags static --ldflags '-extldflags "-static"' -v -tags customenv . /usr/local/go/pkg/tool/linux_amd64/link: running g++ failed: exit status 1 /usr/bin/ld: cannot find -lIconv::Iconv /usr/bin/ld: /go/opencv/build/lib/libopencv_core.a(opencl_core.cpp.o): in function `opencl_check_fn(int)': opencl_core.cpp:(.text._ZL15opencl_check_fni+0xea): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/bin/ld: cannot find -lIconv::Iconv collect2: error: ld returned 1 exit status

[deadprogram]

Did you try the command:

make build_static

by any chance?

[AnteWall]

I have the same error as above. I try building it inside a docker container with the new static dockerfile and recieve the same error.

I also tried by checking out the repo and building with make build_static but recieve the same result

See example files below:

Dockerfile

FROM ghcr.io/hybridgroup/opencv:4.8.0-static

WORKDIR app

COPY . .

RUN go build -tags static --ldflags '-extldflags "-static"' -o output main.go
CMD ["/app/output"]

main.go

package main

import (
    "fmt"
    "gocv.io/x/gocv"
)

func main() {
    fmt.Println(fmt.Sprintf("opencv version: %s, gocv version: %s", gocv.OpenCVVersion(), gocv.Version()))
}