Created attachment 565670 [details] build.log there is an upstream bug[1] with a pull request. apparently this is also valid for nghttp2-1.33.0. [1] https://github.com/nghttp2/nghttp2/issues/1239
Created attachment 565672 [details, diff] patch for tls_session_get_cb this fixed the build for me. this is not the upstream pull request https://github.com/nghttp2/nghttp2/pull/1270