Is nghttp2.lib is listed in the to the linker input settings
(Properties->Configuration Properties->Linker->Input->Additional
Dependencies)?

The "additional library directories" only tells visual studio where to find
the input libs, you also have to tell it which libraries actually need to
be linked in.

-Joel

On Mon, May 15, 2017 at 8:25 AM, Lucas Le Gouic <lucas_at_wolcengame.com>
wrote:

> Hello everyone,
>
> I am currently trying to build Libcurl 7.54.0 with OpenSSL and HTTP2 on
> windows 10 using Visual Studio 2015 and I am getting these errors in the
> build log at the end of generation:
>
> ------------------------------------------------------------
> ----------------------------
> 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
> ------------------------------------------------------------
> ----------------------------
>
> According to OpenSSL & nghttp2 path on my computer, I have added the
> following to curl & libcurl project:
> I have added the following folders to my additionnal library directories
> (curl project->properties->configuration properties->linker->general->additionnal
> library directories) :
> C:\OpenSSL-Win32\lib
> C:\nghttp2-1.22.0\lib
>
> And added for both curl and libcurl project additionnal include
> directories (both projects->properties->configuration
> properties->c/c++->general->additionnal include directories) :
> C:\OpenSSL-Win32\include
> C:\nghttp2-1.22.0\lib\includes
>
> I also added the definition of USE_NGHTTP2 to both project preprocessor
> definitions (both projects->properties->configuration
> properties->C/C++->Preprocessor->Preprocessor Definitions) in order to
> compile with nghttp2.
>
> Finally, I am building using configuration "LIB Release - DLL OpenSSL"
> with target platform Win32.
>
> I am surely missing something but I can't see what at the moment.
>
> Thank you for your assistance
>
> Lucas
>
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Received on 2017-05-15