CODEWITHSUNDEEP
linuxgo
Amir Shabani
Amir Shabani

Reputation: 4207

package .: C source files not allowed when not using cgo or SWIG: main.c

For simplicity, I created two "Hello World" programs in the same directory, called main.go and main.c.

Golang:

package main

import "fmt"

func main() {
    fmt.Println("Hello World!")
}

C:

#include <stdio.h>

int main() {
    printf("Hello World!\n");
    return 0;
}

And both programs compile and run okay:

hello world in Golang and C

But as you can see, VSCode is giving me an error that says:

package .: C source files not allowed when not using cgo or SWIG: main.c

According to this answer, I have to remove and reinstall Go, and install the newer version that is above 1.5. So I ran this command to see where it's installed:

$ which go
/usr/local/go/bin/go

And then I removed that directory:

$ sudo rm -rf /usr/local/go

Now the command no longer works:

$ go version
zsh: command not found: go
$ which go
go not found

To make sure, I also deleted the go directory in $HOME:

$ sudo rm -rf $HOME/go

I also checked to see if I may have installed it through pacman, but there's no go package in the output:

$ pacman -Q | grep go
argon2 20190702-3
go-tools 2:1.14+3923+c00d67ef2-1
haskell-vector-algorithms 0.8.0.3-21
pango 1:1.44.7+11+g73b46b04-1
pangomm 2.42.1-2

Then I downloaded and extracted go1.15.3.linux-amd64.tar.gz into /usr/local/:

$ sudo tar -C /usr/local -xzf go1.15.3.linux-amd64.tar.gz

Now I can see that it's installed:

$ go version
go version go1.15.3 linux/amd64
$ which go
/usr/local/go/bin/go

I also have this directory in the $PATH, as I add this export command in my ~/.zshrc file:

export PATH=$PATH:/usr/local/go/bin

Now I close VSCode and reopen it, but the same error is there.

One answer suggests that the $GOROOT variable must be set to the right directory, currently this variable for me is empty. So I add this export in my ~/.zshrc file:

export GOROOT=/usr/local/go

But the error is still there. How can I fix this?

Upvotes: 1

Views: 2164

Answers (2)

RomanTheReader
RomanTheReader

Reputation: 33

Have you tried adding this as the first line to your .c file:

//go:build ignore

This should tell go build to ignore the .c files.

Upvotes: 0

Nexus242
Nexus242

Reputation: 629

"C source files not allowed when not using cgo or SWIG" that means you have a main.c file in the same folder of main.go, but you are not using it like cgo

Solution: Put main.c in another folder

Upvotes: 2

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