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> This happens with things like os.UserHomeDir or some networking things like DNS lookups.

The docs do not mention this CGO dependency, are you sure?

https://pkg.go.dev/os#UserHomeDir

I was surprised too, that I had to check the docs, so I assume the user was misinformed.

Perhaps I misremembered or things changed? For instance, the os/user results in a dynamicly linked executable: https://play.golang.com/p/7QsmcjJI4H5

There are multiple standard library functions that do it.. I recall some in "net" and some in "os".

os.UserHomeDir is specified to read the HOME environment variable, so it doesn’t require CGo. os/user does, but only to support NSS and LDAP, which are provided by libc. That’s also why net requires CGo- for getaddrinfo using resolv.conf

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