build: check for SetThreadDescription() at configure time

cmake/bitcoin-build-config.h.in

@@ -76,6 +76,9 @@
 /* Define this symbol if you have posix_fallocate */
 #cmakedefine HAVE_POSIX_FALLOCATE 1
 
+/* Define this symbol if you have SetThreadDescription */
+#cmakedefine HAVE_SETTHREADDESCRIPTION 1
+
 /* Define this symbol if platform supports unix domain sockets */
 #cmakedefine HAVE_SOCKADDR_UN 1
 

cmake/introspection.cmake

@@ -76,6 +76,10 @@ check_cxx_source_compiles("
   " HAVE_STRONG_GETAUXVAL
 )
 
+# Check for SetThreadDescription(), which is missing from mingw-w64 headers
+# before 12.0.0.
+check_cxx_symbol_exists(SetThreadDescription "windows.h" HAVE_SETTHREADDESCRIPTION)
+
 # Check for UNIX sockets.
 check_cxx_source_compiles("
   #include <sys/socket.h>