Incorporate user-customized <features.h> configuration.

[mingw/mingw-org-wsl.git] / mingwrt / include / _mingw.h.in

diff --git a/mingwrt/include/_mingw.h.in b/mingwrt/include/_mingw.h.in
index d7621b0..b72b853 100644 (file)
--- a/mingwrt/include/_mingw.h.in
+++ b/mingwrt/include/_mingw.h.in
@@ -7,7 +7,7 @@
  * $Id$
  *
  * Written by Mumit Khan  <khan@xraylith.wisc.edu>
- * Copyright (C) 1999, 2001-2011, 2014-2018, MinGW.org Project
+ * Copyright (C) 1999, 2001-2011, 2014-2019, MinGW.org Project
  *
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -161,6 +161,36 @@
 #define __CRT_GLOB_ESCAPE_CHAR__       (char)(127)
 
 
+/* Load any user-customized features configuration...
+ */
+#ifdef _MINGW_FEATURES_HEADER
+/* ...from a user-specified, or project-specified alternative file...
+ */
+#include _MINGW_FEATURES_HEADER
+#else
+/* ...or fall back to the default configuration file, (which may,
+ * or may not have been customized).
+ */
+#include <features.h>
+#endif
+
+#ifndef __MINGW_FEATURES__
+/* Regardless of how the preceding features configuration header was
+ * identified, we normally expect that will have defined this, but we
+ * supply this fall-back, just in case it is needed.
+ */
+#define __MINGW_FEATURES__             0ULL
+#endif
+
+/* Define macros to facilitate the user-specified configuration.
+ */
+#define __MINGW_FEATURE_ENABLE__(__FEATURE__) | (__FEATURE__)
+#define __MINGW_FEATURE_IGNORE__(__FEATURE__)
+
+#define __MINGW_FEATURES_BEGIN__       0x0000000000000000ULL
+#define __MINGW_FEATURES_UNSET__       0x0000000000000000ULL
+#define __MINGW_FEATURES_END__
+
 /* Manifest definitions identifying the flag bits, controlling activation
  * of MinGW features, as specified by the user in __MINGW_FEATURES__.
  */