我目前正在尝试使用 Visual Studio 2015 在 Windows 10 上使用 OpenSSL 和 HTTP2 构建 Libcurl 7.54.0，我在编译结束时在构建日志中收到这些错误：
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_new referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_del referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_send_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_frame_recv_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_invalid_frame_recv_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_data_chunk_recv_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_before_frame_send_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_frame_send_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_frame_not_send_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_stream_close_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_begin_headers_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_on_header_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_callbacks_set_error_callback referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_client_new referenced in function _Curl_http2_init
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_del referenced in function _http2_disconnect
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_send referenced in function _h2_session_send
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_mem_recv referenced in function _Curl_http2_switched
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_resume_data referenced in function _Curl_http2_done_sending
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_want_read referenced in function _should_close_session
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_want_write referenced in function _http2_perform_getsock
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_get_stream_user_data referenced in function _before_frame_send
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_set_stream_user_data referenced in function _Curl_http2_done
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_get_remote_settings referenced in function _on_frame_recv
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_upgrade referenced in function _Curl_http2_switched
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_pack_settings_payload referenced in function _Curl_http2_request_upgrade
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_strerror referenced in function _Curl_http2_switched
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_http2_strerror referenced in function _Curl_http2_strerror
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_priority_spec_init referenced in function _h2_pri_spec
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_submit_request referenced in function _http2_send
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_submit_priority referenced in function _h2_session_send
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_submit_rst_stream referenced in function _Curl_http2_done
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_submit_settings referenced in function _Curl_http2_switched
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_session_set_local_window_size referenced in function _Curl_http2_switched
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_version referenced in function _Curl_http2_ver
1>libcurl.lib(http2.obj) : error LNK2019: unresolved external symbol __imp__nghttp2_is_fatal referenced in function _Curl_http2_switched
1>..\..\..\..\build\Win32\VC14\LIB Release - DLL OpenSSL\curl.exe : fatal error LNK1120: 35 unresolved externals
根据我计算机上的 OpenSSL 和 nghttp2 路径，我在 curl 和 libcurl 项目中添加了以下内容：我已将以下文件夹添加到我的附加库目录中（curl 项目->属性->配置属性->链接器->通用->附加库目录）：
C:\OpenSSL-Win32\lib
C:\nghttp2-1.22.0\lib
并为 curl 和 libcurl 项目附加包含目录（项目->properties->configuration properties->c/c++->general->additionnal 包含目录）添加：
C:\OpenSSL-Win32\include
C:\nghttp2-1.22.0\lib\includes
我还在两个项目预处理器定义（两个项目->属性->配置属性->C/C++->预处理器->预处理器定义）中添加了 USE_NGHTTP2 的定义，以便使用 nghttp2 进行编译。
最后，我正在使用目标平台 Win32 的配置“LIB Release - DLL OpenSSL”进行构建。
编辑：这个问题似乎与 nghttp2 有关，因为我在没有 NGHTTP2 预处理器定义的情况下成功构建。
我肯定错过了一些东西，但我现在看不到什么。
谢谢您的帮助
卢卡斯