[PATCH proto/x11proto] Adjust <windows.h> wrapping to work with MinGW-w64 headers as well

[Jon TURNEY]

Adjust <windows.h> wrapping to work with MinGW-w64 as well MinGW.org headers,
which define BOOL in a different way.
Add some more comments on what we doing here.

(For the unaware, MinGW-w64 is a fork of MinGW.org, which adds support for the
64-bit Windows target, but also (despite the name) supports the 32-bit Windows
target.)

Signed-off-by: Jon TURNEY <jon.turney at dronecode.org.uk>
---
 Xwindows.h |   39 ++++++++++++++++++++++++++++-----------
 1 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/Xwindows.h b/Xwindows.h
index 6318155..e1c2b9e 100644
--- a/Xwindows.h
+++ b/Xwindows.h
@@ -29,28 +29,39 @@ The Open Group.
 /*
  * This header file has the sole purpose of allowing the inclusion of
  * windows.h without getting any name conflicts with X headers code, by
- * renaming the conflicting definitions from windows.h
- *
- * Some (non-Microsoft) versions of the Windows API headers actually avoid
+ * renaming or disabling the conflicting definitions from windows.h
+ */
+
+/*
+ * Mingw.org versions of the Windows API headers actually avoid
  * making the conflicting definitions if XFree86Server is defined, so we
  * need to remember if that was defined and undefine it during including
  * windows.h (so the conflicting definitions get wrapped correctly), and
- * then redefine it afterwards...
- *
- * There doesn't seem to be a good way to wrap the min/max macros from
- * windows.h, so we simply avoid defining them completely, allowing any
- * pre-existing definition to stand.
- *
+ * then redefine it afterwards. (This was never the correct thing to
+ * do as it's no help at all to X11 clients which also need to use the
+ * Win32 API)
  */
-
 #undef _XFree86Server
 #ifdef XFree86Server
 # define _XFree86Server
 # undef XFree86Server
 #endif
 
+/*
+ * There doesn't seem to be a good way to wrap the min/max macros from
+ * windows.h, so we simply avoid defining them completely, allowing any
+ * pre-existing definition to stand.
+ *
+ */
 #define NOMINMAX
-#define BOOL wBOOL
+
+/*
+  mingw-w64 headers define BOOL as a typedef, protecting against macros
+  mingw.org headers define BOOL in terms of WINBOOL
+  ... so try to come up with something which works with both :-)
+ */
+#define _NO_BOOL_TYPEDEF
+#define BOOL WINBOOL
 #define INT32 wINT32
 #undef Status
 #define Status wStatus
@@ -68,6 +79,12 @@ The Open Group.
 #undef FreeResource
 #undef CreateWindowA
 
+/*
+  Older version of this header used to name the windows API bool type wBOOL,
+  rather than more standard name WINBOOL
+*/
+#define wBOOL WINBOOL
+
 #ifdef RESOURCE_H
 # undef RT_FONT
 # undef RT_CURSOR
-- 
1.7.9