Created attachment 27300 [details] [review] patch to make xdmcp optional Xorg can be built without XDMCP support. However, libX11 requires libXdmcp as part of testing for XDMCP's optional AUTH support. Attached is a patch that fixes this.
Pushed as 615220a312b9430a580fe6dcf51703c6ef244f66. Thanks for the patch!
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