What version of nghttp2 are you using? Are you using the cmake build for httpd?
FWIW I just found that I needed nghttp2 >= 1.4.0 on Windows to fix bad linkage in nghttp2 functions that mod_http2 didn't use when I built before. (not related to cmake) After resolving that I now see a bunch of unresolved symbols with mod_proxy_http2. From the number of symbols and the type there seems to be a couple of issues in the httpd CMakeLists.txt file. I can hopefully look at that early tomorrow a.m. -- Born in Roswell... married an alien... http://emptyhammock.com/
