Build working libcurl with WinSSL, NTLM, HTTP2, SSH2 and IPv6 support

Question

I believe the LibCurl here satisfies all that:

https://curl.haxx.se/windows

Using this file:

#include <curl/curl.h>
#include <stdio.h>
int main() {
   curl_version_info_data *o = curl_version_info(CURLVERSION_NOW); 
   printf("SSL: %s\n", o->ssl_version);
   printf("NTLM: %d\n", o->features & CURL_VERSION_NTLM);
   printf("HTTP/2: %d\n", o->features & CURL_VERSION_HTTP2);
   printf("SSH2: %s\n", o->libssh_version);
   printf("IPv6: %d\n", o->features & CURL_VERSION_IPV6);
}

Build:

cc https.c `
'-Icurl-7.70.0-win64-mingw\include' `
'-Lcurl-7.70.0-win64-mingw\lib' `
-lcrypt32 `
-lcurl `
-lwldap32 `
-lws2_32

Result:

SSL: OpenSSL/1.1.1g (Schannel)
NTLM: 16
HTTP/2: 65536
SSH2: libssh2/1.9.0
IPv6: 1

I did not build with Visual Studio, but Clang:

https://github.com/mstorsjo/llvm-mingw

Also I am not sure what exactly OpenSSL/1.1.1g (Schannel), I guess it means OpenSSL and WinSSL both? If that’s not the case, you can build LibCurl yourself with CFG=-winssl:

https://github.com/nu8/gulf/blob/master/c-https/1-curl.ps1

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