Back-port 2010-09-17T21:34:45Z!eliz@gnu.org from the trunk, to resolve bug #7452.

 w32.c (_PROCESS_MEMORY_COUNTERS_EX): Don't define with versions
 of w32api >= 3.15.

src/ChangeLog

+2010-11-22  Eli Zaretskii  <eliz@gnu.org>
+
+	* w32.c (_PROCESS_MEMORY_COUNTERS_EX): Don't define with versions
+	of w32api >= 3.15.  (Bug#6989)  (Bug#7452)
+
 2010-11-22  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
 
 	* alloc.c (mark_terminals): Ensure that the image cache is marked

src/w32.c

@@ -94,8 +94,11 @@ typedef struct _MEMORY_STATUS_EX {
 
 #include <tlhelp32.h>
 #include <psapi.h>
+#include <w32api.h>
+#if !defined(__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
 /* This either is not in psapi.h or guarded by higher value of
-   _WIN32_WINNT than what we use.  */
+   _WIN32_WINNT than what we use.  w32api supplied with MinGW 3.15
+   defines it in psapi.h  */
 typedef struct _PROCESS_MEMORY_COUNTERS_EX {
 	DWORD cb;
 	DWORD PageFaultCount;
@@ -109,6 +112,7 @@ typedef struct _PROCESS_MEMORY_COUNTERS_EX {
 	DWORD PeakPagefileUsage;
 	DWORD PrivateUsage;
 } PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX;
+#endif
 
 #ifdef HAVE_SOCKETS	/* TCP connection support, if kernel can do it */
 #include <sys/socket.h>