0816-gratuitous-vista-usage.patch

diff --git a/libstdc++-v3/config/os/mingw32/error_constants.h b/libstdc++-v3/config/os/mingw32/error_constants.h
--- a/libstdc++-v3/config/os/mingw32/error_constants.h
+++ b/libstdc++-v3/config/os/mingw32/error_constants.h
@@ -31,10 +31,17 @@
 #  define _GLIBCXX_ERROR_CONSTANTS
 
 #include <bits/c++config.h>
 #include <cerrno>
 
+#ifndef ELOOP
+#define ELOOP		2000
+#endif
+#ifndef EOVERFLOW
+#define EOVERFLOW	2001
+#endif
+
 namespace std _GLIBCXX_VISIBILITY(default)
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
 // Most of the commented-out error codes are socket-related and could be
@@ -99,10 +106,12 @@ namespace std _GLIBCXX_VISIBILITY(defaul
 //    not_a_stream = 				ENOSTR,
 //    not_connected = 				ENOTCONN,
       not_enough_memory = 			ENOMEM,
 #ifdef _GLIBCXX_HAVE_ENOTSUP
       not_supported = 				ENOTSUP,
+#else
+      not_supported = 				ENOSYS,
 #endif
 //    operation_canceled = 			ECANCELED,
 //    operation_in_progress = 			EINPROGRESS,
 #ifdef _GLIBCXX_HAVE_EPERM
       operation_not_permitted = 		EPERM,
@@ -125,16 +134,16 @@ namespace std _GLIBCXX_VISIBILITY(defaul
 #ifdef _GLIBCXX_HAVE_ETIMEDOUT
       timed_out = 				ETIMEDOUT,
 #endif
       too_many_files_open_in_system = 		ENFILE,
       too_many_files_open = 			EMFILE,
-      too_many_links = 				EMLINK
-//    too_many_symbolic_link_levels = 		ELOOP,
-#ifdef _GLIBCXX_HAVE_EOVERFLOW
-	,
+      too_many_links =  			EMLINK,
+      too_many_symbolic_link_levels = 		ELOOP,
+//#ifdef _GLIBCXX_HAVE_EOVERFLOW
+//	,
       value_too_large = 			EOVERFLOW
-#endif
+//#endif
 //    wrong_protocol_type = 			EPROTOTYPE
    };
 
 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace
diff --git a/libstdc++-v3/src/filesystem/ops-common.h b/libstdc++-v3/src/filesystem/ops-common.h
--- a/libstdc++-v3/src/filesystem/ops-common.h
+++ b/libstdc++-v3/src/filesystem/ops-common.h
@@ -41,10 +41,13 @@
 # include <utime.h> // utime
 #endif
 
 #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
 # include <wchar.h>
+# ifndef _off64_t
+# define _off64_t __off64_t
+# endif
 #endif
 
 #ifdef NEED_DO_COPY_FILE
 # include <filesystem>
 # include <ext/stdio_filebuf.h>