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Visual Studio Code – How to set cgo env variable before vscode launch code?

I have golang code like:


import (
    "github.com/bobertlo/go-mpg123/mpg123"
)

func main() {
    ...
}

From terminal, to build this code. I must set below env variable:

export C_INCLUDE_PATH=$C_INCLUDE_PATH:/opt/homebrew/Cellar/mpg123/1.32.3/include 
export LIBRARY_PATH=$LIBRARY_PATH:/opt/homebrew/Cellar/mpg123/1.32.3/lib

Now I want build using vscode. I configure the launch.json, tasks.json below:

// launch.json
{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Package",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "preLaunchTask": "Set CGO_CFLAGS",
            "program": "${fileDirname}"
        }
    ]
}

// tasks.json
{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Set C_INCLUDE_PATH",
            "type": "shell",
            "command": "export C_INCLUDE_PATH=$C_INCLUDE_PATH:/opt/homebrew/Cellar/mpg123/1.32.3/include",
            "problemMatcher": []
        },
        {
            "label": "Set LIBRARY_PATH",
            "type": "shell",
            "command": "export LIBRARY_PATH=$LIBRARY_PATH:/opt/homebrew/Cellar/mpg123/1.32.3/lib",
        },
        {
            "label": "Set CGO_CFLAGS",
            "type": "shell",
            "dependsOn":["Set C_INCLUDE_PATH", "Set LIBRARY_PATH"],
            "dependsOrder": "sequence",
        },
    ]
}

But it didn’t work. It reports:

Build Error: go build -o /Users/xxx/Projects/portauio-go/examples/__debug_bin2329559837 -gcflags all=-N -l .
# github.com/bobertlo/go-mpg123/mpg123
../../../../go/pkg/mod/github.com/bobertlo/[email protected]/mpg123/mpg123.go:8:10: fatal error: 'mpg123.h' file not found
#include <mpg123.h>
         ^~~~~~~~~~
1 error generated. (exit status 1)

How can I make it work?

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I suppose it's because the task type is set go "shell". That means it will execute in another shell, and the env it set won't take effect in current shell. I set env in launch.json, and now it works

            {
            "name": "Launch mp3.go",
            "type": "go",
            "request": "launch",
            "mode": "auto",
            "program": "examples/mp3.go",
            "args": ["sample-12s.mp3"],
            "env": {
                "CPATH": "${CPATH}:/opt/homebrew/Cellar/mpg123/1.32.3/include",
                "LIBRARY_PATH": "${LIBRARY_PATH}:/opt/homebrew/Cellar/mpg123/1.32.3/lib"
            }
        },

  2. 0

    Can ${env:ENV_VAR} variable references be what you are looking for? This is workspace specific.

    However there are specific settings for go extention as well.

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