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diff --git a/Source/kwsys/SystemInformation.hxx.in b/Source/kwsys/SystemInformation.hxx.in
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+++ b/Source/kwsys/SystemInformation.hxx.in
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+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#ifndef @KWSYS_NAMESPACE@_SystemInformation_h
+#define @KWSYS_NAMESPACE@_SystemInformation_h
+
+#include <@KWSYS_NAMESPACE@/Configure.hxx>
+
+#include <stddef.h> /* size_t */
+#include <string>
+
+namespace @KWSYS_NAMESPACE@ {
+
+// forward declare the implementation class
+class SystemInformationImplementation;
+
+class @KWSYS_NAMESPACE@_EXPORT SystemInformation
+{
+#if @KWSYS_USE_LONG_LONG@
+  typedef long long LongLong;
+#elif @KWSYS_USE___INT64@
+  typedef __int64 LongLong;
+#else
+#  error "No Long Long"
+#endif
+  friend class SystemInformationImplementation;
+  SystemInformationImplementation* Implementation;
+
+public:
+  // possible parameter values for DoesCPUSupportFeature()
+  static const long int CPU_FEATURE_MMX = 1 << 0;
+  static const long int CPU_FEATURE_MMX_PLUS = 1 << 1;
+  static const long int CPU_FEATURE_SSE = 1 << 2;
+  static const long int CPU_FEATURE_SSE2 = 1 << 3;
+  static const long int CPU_FEATURE_AMD_3DNOW = 1 << 4;
+  static const long int CPU_FEATURE_AMD_3DNOW_PLUS = 1 << 5;
+  static const long int CPU_FEATURE_IA64 = 1 << 6;
+  static const long int CPU_FEATURE_MP_CAPABLE = 1 << 7;
+  static const long int CPU_FEATURE_HYPERTHREAD = 1 << 8;
+  static const long int CPU_FEATURE_SERIALNUMBER = 1 << 9;
+  static const long int CPU_FEATURE_APIC = 1 << 10;
+  static const long int CPU_FEATURE_SSE_FP = 1 << 11;
+  static const long int CPU_FEATURE_SSE_MMX = 1 << 12;
+  static const long int CPU_FEATURE_CMOV = 1 << 13;
+  static const long int CPU_FEATURE_MTRR = 1 << 14;
+  static const long int CPU_FEATURE_L1CACHE = 1 << 15;
+  static const long int CPU_FEATURE_L2CACHE = 1 << 16;
+  static const long int CPU_FEATURE_L3CACHE = 1 << 17;
+  static const long int CPU_FEATURE_ACPI = 1 << 18;
+  static const long int CPU_FEATURE_THERMALMONITOR = 1 << 19;
+  static const long int CPU_FEATURE_TEMPSENSEDIODE = 1 << 20;
+  static const long int CPU_FEATURE_FREQUENCYID = 1 << 21;
+  static const long int CPU_FEATURE_VOLTAGEID_FREQUENCY = 1 << 22;
+  static const long int CPU_FEATURE_FPU = 1 << 23;
+
+public:
+  SystemInformation();
+  ~SystemInformation();
+
+  SystemInformation(const SystemInformation&) = delete;
+  SystemInformation& operator=(const SystemInformation&) = delete;
+
+  const char* GetVendorString();
+  const char* GetVendorID();
+  std::string GetTypeID();
+  std::string GetFamilyID();
+  std::string GetModelID();
+  std::string GetModelName();
+  std::string GetSteppingCode();
+  const char* GetExtendedProcessorName();
+  const char* GetProcessorSerialNumber();
+  int GetProcessorCacheSize();
+  unsigned int GetLogicalProcessorsPerPhysical();
+  float GetProcessorClockFrequency();
+  int GetProcessorAPICID();
+  int GetProcessorCacheXSize(long int);
+  bool DoesCPUSupportFeature(long int);
+
+  // returns an informative general description of the cpu
+  // on this system.
+  std::string GetCPUDescription();
+
+  const char* GetHostname();
+  std::string GetFullyQualifiedDomainName();
+
+  const char* GetOSName();
+  const char* GetOSRelease();
+  const char* GetOSVersion();
+  const char* GetOSPlatform();
+
+  int GetOSIsWindows();
+  int GetOSIsLinux();
+  int GetOSIsApple();
+
+  // returns an informative general description of the os
+  // on this system.
+  std::string GetOSDescription();
+
+  // returns if the operating system is 64bit or not.
+  bool Is64Bits();
+
+  unsigned int GetNumberOfLogicalCPU();
+  unsigned int GetNumberOfPhysicalCPU();
+
+  bool DoesCPUSupportCPUID();
+
+  // Retrieve id of the current running process
+  LongLong GetProcessId();
+
+  // Retrieve memory information in MiB.
+  size_t GetTotalVirtualMemory();
+  size_t GetAvailableVirtualMemory();
+  size_t GetTotalPhysicalMemory();
+  size_t GetAvailablePhysicalMemory();
+
+  // returns an informative general description if the installed and
+  // available ram on this system. See the GetHostMemoryTotal, and
+  // Get{Host,Proc}MemoryAvailable methods for more information.
+  std::string GetMemoryDescription(const char* hostLimitEnvVarName = NULL,
+                                   const char* procLimitEnvVarName = NULL);
+
+  // Retrieve amount of physical memory installed on the system in KiB
+  // units.
+  LongLong GetHostMemoryTotal();
+
+  // Get total system RAM in units of KiB available colectivley to all
+  // processes in a process group. An example of a process group
+  // are the processes comprising an mpi program which is running in
+  // parallel. The amount of memory reported may differ from the host
+  // total if a host wide resource limit is applied. Such reource limits
+  // are reported to us via an application specified environment variable.
+  LongLong GetHostMemoryAvailable(const char* hostLimitEnvVarName = NULL);
+
+  // Get total system RAM in units of KiB available to this process.
+  // This may differ from the host available if a per-process resource
+  // limit is applied. per-process memory limits are applied on unix
+  // system via rlimit API. Resource limits that are not imposed via
+  // rlimit API may be reported to us via an application specified
+  // environment variable.
+  LongLong GetProcMemoryAvailable(const char* hostLimitEnvVarName = NULL,
+                                  const char* procLimitEnvVarName = NULL);
+
+  // Get the system RAM used by all processes on the host, in units of KiB.
+  LongLong GetHostMemoryUsed();
+
+  // Get system RAM used by this process id in units of KiB.
+  LongLong GetProcMemoryUsed();
+
+  // Return the load average of the machine or -0.0 if it cannot
+  // be determined.
+  double GetLoadAverage();
+
+  // enable/disable stack trace signal handler. In order to
+  // produce an informative stack trace the application should
+  // be dynamically linked and compiled with debug symbols.
+  static void SetStackTraceOnError(int enable);
+
+  // format and return the current program stack in a string. In
+  // order to produce an informative stack trace the application
+  // should be dynamically linked and compiled with debug symbols.
+  static std::string GetProgramStack(int firstFrame, int wholePath);
+
+  /** Run the different checks */
+  void RunCPUCheck();
+  void RunOSCheck();
+  void RunMemoryCheck();
+};
+
+} // namespace @KWSYS_NAMESPACE@
+
+#endif