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On Feb 17, 2020, at 9:51 AM, Sandor Szatmari via Darwin-dev <darwin-dev@lists.apple.com> wrote:

I’m assuming you mean the precompile/compile fails with a ‘can’t find the header’ and not a linker error that the symbol doesn’t exist.

No, the <unistd.h> header exists on Darwin. The OP is referring to the _function_ group_member(), which seems to be Linux-specific, not part of any portable API. It would have to be emulated … I don't know much about the users & groups related system calls, so I don't have any suggestions about how. —Jens _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app... This email sent to site_archiver@lists.apple.com