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Some of the test programs fail to build due to missing symbols provided by bcrypt.dll and iphlpapi.dll which are normally resolved when building libevent.dll

Possible fix:

diff --git a/configure.ac b/configure.ac
index 2e1de76606..82bc320a9e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -871,6 +871,7 @@ if test "$bwin32" = "true"; then
   # think it's actually necessary.
   TOR_LIB_GDI=-lgdi32
   TOR_LIB_USERENV=-luserenv
+  TOR_LIB_BCRYPT=-lbcrypt
 else
   TOR_LIB_WS32=
   TOR_LIB_GDI=
@@ -879,6 +880,7 @@ fi
 AC_SUBST(TOR_LIB_WS32)
 AC_SUBST(TOR_LIB_GDI)
 AC_SUBST(TOR_LIB_IPHLPAPI)
+AC_SUBST(TOR_LIB_BCRYPT)
 AC_SUBST(TOR_LIB_SHLWAPI)
 AC_SUBST(TOR_LIB_USERENV)
 
@@ -896,7 +898,7 @@ if test "$enable_static_libevent" = "yes"; then
     fi
 fi
 
-TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
+TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_IPHLPAPI $TOR_LIB_BCRYPT $TOR_LIB_WS32], [
 #ifdef _WIN32
 #include <winsock2.h>
 #endif

EDIT: see patch that fixes openssl linker problems as well -> #40116 (comment 2707945)