Arch Linux

Description:

I have a local DNS stub resolver listening on the localhost (`lo`) interface.
The command `gh auth login` fails because it cannot connect to the localhost DNS resolver.
Using Wireshark, I discovered that the problem is because the source IP for the DNS request packet is the IP address for my ethernet adapter, not the localhost address (127.0.0.1).

I've confirmed that this is a packaging problem because the login command works fine when `gh` is built from the upstream sources.

Additional info:

* package version(s): v2.20.0 through v2.21.2 (maybe further back too)

Steps to reproduce:

1. Set up systemd-resolved (or similar) listening on 127.0.0.53:53/udp
2. Ensure /etc/resolv.conf lists 127.0.0.53 as the only nameserver
3. Run `gh auth login` and select any options. All will fail.

Possible solution:

The problem disappears when line 33 in the PKGBUILD script is commented out:

# ...

export CGO_LDFLAGS="${LDFLAGS}"
# export CGO_ENABLED=0
export GOFLAGS="-buildmode=pie -trimpath -mod=readonly -modcacherw -ldflags=-linkmode=external"

# ...