Can't build custom extension for k6

[ChipArtem]

Brief summary

Im try build custom extension for k6.
But I have an error while building.
Xk6 does not see types in package that I am importing in the extension.

k6 version

v0.42.0

OS

macOS 11

Docker version and image (if applicable)

No response

Steps to reproduce the problem

xk6 build --output xk6Custom --with github.com/ChipArtem/bugxk6

Expected behaviour

Package xk6Custom created

Actual behaviour

Error:
../../../../go/pkg/mod/github.com/ibm-messaging/mq-golang-jms20@v1.9.0/jms20subset/MQOptions.go:5:32: undefined: ibmmq.MQCNO
(I checked, this type is imported correctly in mq-golang-jms20)

Full info:
2023/01/11 11:09:39 [INFO] Temporary folder: /Users/chip/git_repo/bugxk6/buildenv_2023-01-11-1109.559430917
2023/01/11 11:09:39 [INFO] Initializing Go module
2023/01/11 11:09:39 [INFO] exec (timeout=10s): /usr/local/go/bin/go mod init k6
go: creating new go.mod: module k6
2023/01/11 11:09:39 [INFO] Pinning versions
2023/01/11 11:09:39 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod edit -require github.com/ChipArtem/bugxk6@latest
2023/01/11 11:09:39 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod tidy -compat=1.17
go: downloading github.com/ChipArtem/bugxk6 v0.0.0-20230111080905-ebbb48a21070
go: finding module for package github.com/nxadm/tail
go: finding module for package github.com/google/go-cmp/cmp
go: found github.com/google/go-cmp/cmp in github.com/google/go-cmp v0.5.9
go: found github.com/nxadm/tail in github.com/nxadm/tail v1.4.8
2023/01/11 11:09:55 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod tidy -compat=1.17
2023/01/11 11:09:55 [INFO] Writing main module: /Users/chip/git_repo/bugxk6/buildenv_2023-01-11-1109.559430917/main.go
2023/01/11 11:09:55 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod tidy -compat=1.17
2023/01/11 11:09:55 [INFO] Build environment ready
2023/01/11 11:09:55 [INFO] Building k6
2023/01/11 11:09:55 [INFO] exec (timeout=0s): /usr/local/go/bin/go mod tidy -compat=1.17
2023/01/11 11:09:55 [INFO] exec (timeout=0s): /usr/local/go/bin/go build -o /Users/chip/git_repo/bugxk6/xk6 -ldflags=-w -s -trimpath
#github.com/ibm-messaging/mq-golang-jms20/jms20subset
../../../../go/pkg/mod/github.com/ibm-messaging/mq-golang-jms20@v1.9.0/jms20subset/MQOptions.go:5:32: undefined: ibmmq.MQCNO
../../../../go/pkg/mod/github.com/ibm-messaging/mq-golang-jms20@v1.9.0/jms20subset/MQOptions.go:8:25: undefined: ibmmq.MQCNO
2023/01/11 11:09:56 [INFO] Cleaning up temporary folder: /Users/chip/git_repo/bugxk6/buildenv_2023-01-11-1109.559430917
2023/01/11 11:09:56 [FATAL] exit status 2

[mstoykov]

You are getting this error as xk6 defaults to disabling CGO and the dependency in question is using CGO to import C code and then use it.

Running CGO_ENABLED=1 xk6 build --output xk6Custom --with github.com/ChipArtem/bugxk6 does give a C error (not having a header file) so I would expect it will work.

I will move this to the xk6 repo to see if there is a reason we default to CGO_ENABLED=0 by default.

[ChipArtem]

@mstoykov Thanks for the help!