mingw-wsl-patches

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Make <winperf.h> header effectively self-contained.

diff --git a/wslapi/include/winperf.h b/wslapi/include/winperf.h
--- a/wslapi/include/winperf.h
+++ b/wslapi/include/winperf.h
@@ -1,14 +1,13 @@
 #ifndef _WINPERF_H
 #define _WINPERF_H
-#if __GNUC__ >=3
 #pragma GCC system_header
-#endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include <winbase.h>
+
+_BEGIN_C_DECLS
+
 #define PERF_DATA_VERSION 1
 #define PERF_DATA_REVISION 1
 #define PERF_NO_INSTANCES -1
 #define PERF_SIZE_DWORD 0
 #define PERF_SIZE_LARGE 256
@@ -131,9 +130,9 @@ typedef struct _PERF_COUNTER_BLOCK {
 	DWORD ByteLength;
 } PERF_COUNTER_BLOCK, *PPERF_COUNTER_BLOCK;
 typedef DWORD(CALLBACK PM_OPEN_PROC)(LPWSTR);
 typedef DWORD(CALLBACK PM_COLLECT_PROC)(LPWSTR,PVOID*,PDWORD,PDWORD);
 typedef DWORD(CALLBACK PM_CLOSE_PROC)(void);
-#ifdef __cplusplus
-}
+
+_END_C_DECLS
+
 #endif
-#endif