diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/Windows/System.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/Windows/System.cpp	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,64 @@
+// Windows/System.cpp
+
+#include "StdAfx.h"
+
+#include "System.h"
+
+namespace NWindows {
+namespace NSystem {
+
+UInt32 GetNumberOfProcessors()
+{
+  SYSTEM_INFO systemInfo;
+  GetSystemInfo(&systemInfo);
+  return (UInt32)systemInfo.dwNumberOfProcessors;
+}
+
+#if !defined(_WIN64) && defined(__GNUC__)
+
+typedef struct _MY_MEMORYSTATUSEX {
+  DWORD dwLength;
+  DWORD dwMemoryLoad;
+  DWORDLONG ullTotalPhys;
+  DWORDLONG ullAvailPhys;
+  DWORDLONG ullTotalPageFile;
+  DWORDLONG ullAvailPageFile;
+  DWORDLONG ullTotalVirtual;
+  DWORDLONG ullAvailVirtual;
+  DWORDLONG ullAvailExtendedVirtual;
+} MY_MEMORYSTATUSEX, *MY_LPMEMORYSTATUSEX;
+
+#else
+
+#define MY_MEMORYSTATUSEX MEMORYSTATUSEX
+#define MY_LPMEMORYSTATUSEX LPMEMORYSTATUSEX
+
+#endif
+
+typedef BOOL (WINAPI *GlobalMemoryStatusExP)(MY_LPMEMORYSTATUSEX lpBuffer);
+
+UInt64 GetRamSize()
+{
+  MY_MEMORYSTATUSEX stat;
+  stat.dwLength = sizeof(stat);
+  #ifdef _WIN64
+  if (!::GlobalMemoryStatusEx(&stat))
+    return 0;
+  return stat.ullTotalPhys;
+  #else
+  GlobalMemoryStatusExP globalMemoryStatusEx = (GlobalMemoryStatusExP)
+        ::GetProcAddress(::GetModuleHandle(TEXT("kernel32.dll")),
+        "GlobalMemoryStatusEx");
+  if (globalMemoryStatusEx != 0)
+    if (globalMemoryStatusEx(&stat))
+      return stat.ullTotalPhys;
+  {
+    MEMORYSTATUS stat;
+    stat.dwLength = sizeof(stat);
+    GlobalMemoryStatus(&stat);
+    return stat.dwTotalPhys;
+  }
+  #endif
+}
+
+}}