diff -aur cmake-3.5.2/Source/kwsys/SystemInformation.cxx.orig cmake-3.5.2/Source/kwsys/SystemInformation.cxx
--- cmake-3.6.0/Source/kwsys/SystemInformation.cxx.orig	2016-07-07 10:47:27.000000000 -0400
+++ cmake-3.6.0/Source/kwsys/SystemInformation.cxx	2016-07-22 09:17:19.386054600 -0400
@@ -916,7 +916,7 @@
 // Hide implementation details in an anonymous namespace.
 namespace {
 // *****************************************************************************
-#if defined(__linux) || defined(__APPLE__)
+#if defined(__linux) || defined(__APPLE__) || defined(__CYGWIN__) || defined(__MSYS__)
 int LoadLines(
       FILE *file,
       std::vector<std::string> &lines)
@@ -952,7 +952,7 @@
   return nRead;
 }
 
-# if defined(__linux)
+# if defined(__linux) || defined(__CYGWIN__) || defined(__MSYS__)
 // *****************************************************************************
 int LoadLines(
       const char *fileName,
@@ -991,7 +991,7 @@
 }
 #endif
 
-#if defined(__linux)
+#if defined(__linux) || defined(__CYGWIN__) || defined(__MSYS__)
 // ****************************************************************************
 template<typename T>
 int GetFieldsFromFile(
@@ -1071,7 +1071,7 @@
 #endif
 
 // ****************************************************************************
-#if !defined(_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
+#if !defined(_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)  && !defined(__MSYS__)
 void StacktraceSignalHandler(
       int sigNo,
       siginfo_t *sigInfo,
@@ -1496,7 +1496,7 @@
 #endif // don't define this class if we're not using it
 
 // --------------------------------------------------------------------------
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32) || defined(__CYGWIN__) || defined(__MSYS__)
 # define KWSYS_SYSTEMINFORMATION_USE_GetSystemTimes
 #endif
 #if defined(_MSC_VER) && _MSC_VER < 1310
@@ -1640,7 +1640,7 @@
   this->QueryBSDProcessor();
 #elif defined(__hpux)
   this->QueryHPUXProcessor();
-#elif defined(__linux) || defined(__CYGWIN__)
+#elif defined(__linux) || defined(__CYGWIN__) || defined(__MSYS__)
   this->RetreiveInformationFromCpuInfoFile();
 #else
   this->QueryProcessor();
@@ -1664,7 +1664,7 @@
   this->QueryQNXMemory();
 #elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
   this->QueryBSDMemory();
-#elif defined(__CYGWIN__)
+#elif defined(__CYGWIN__) || defined(__MSYS__)
   this->QueryCygwinMemory();
 #elif defined(_WIN32)
   this->QueryWindowsMemory();
@@ -3199,7 +3199,6 @@
     pos = buffer.find("processor\t",pos+1);
     }
 
-#ifdef __linux
   // Find the largest physical id.
   int maxId = -1;
   std::string idc =
@@ -3232,14 +3231,6 @@
             atoi(this->ExtractValueFromCpuInfoFile(buffer,"ncpus active").c_str());
     }
 
-#else // __CYGWIN__
-  // does not have "physical id" entries, neither "cpu cores"
-  // this has to be fixed for hyper-threading.
-  std::string cpucount =
-    this->ExtractValueFromCpuInfoFile(buffer,"cpu count");
-  this->NumberOfPhysicalCPU=
-    this->NumberOfLogicalCPU = atoi(cpucount.c_str());
-#endif
   // gotta have one, and if this is 0 then we get a / by 0n
   // better to have a bad answer than a crash
   if(this->NumberOfPhysicalCPU <= 0)
@@ -3437,7 +3428,7 @@
   GlobalMemoryStatusEx(&statex);
   return statex.ullTotalPhys/1024;
 # endif
-#elif defined(__linux)
+#elif defined(__linux) || defined(__CYGWIN__) || defined(__MSYS__)
   SystemInformation::LongLong memTotal=0;
   int ierr=GetFieldFromFile("/proc/meminfo","MemTotal:",memTotal);
   if (ierr)
@@ -3568,7 +3559,7 @@
   GlobalMemoryStatusEx(&statex);
   return (statex.ullTotalPhys - statex.ullAvailPhys)/1024;
 # endif
-#elif defined(__linux)
+#elif defined(__linux) || defined(__CYGWIN__) || defined(__MSYS__)
   // First try to use MemAvailable, but it only works on newer kernels
   const char *names2[3]={"MemTotal:","MemAvailable:",NULL};
   SystemInformation::LongLong values2[2]={SystemInformation::LongLong(0)};
@@ -3638,7 +3629,7 @@
     return -2;
     }
   return pmc.WorkingSetSize/1024;
-#elif defined(__linux)
+#elif defined(__linux) || defined(__CYGWIN__) || defined(__MSYS__)
   SystemInformation::LongLong memUsed=0;
   int ierr=GetFieldFromFile("/proc/self/status","VmRSS:",memUsed);
   if (ierr)
@@ -3722,7 +3713,7 @@
 {
 #if defined(_WIN32)
   return GetCurrentProcessId();
-#elif defined(__linux) || defined(__APPLE__)
+#elif defined(__linux) || defined(__APPLE__) || defined(__CYGWIN__) || defined(__MSYS__)
   return getpid();
 #else
   return -1;
@@ -3782,7 +3773,7 @@
 */
 void SystemInformationImplementation::SetStackTraceOnError(int enable)
 {
-#if !defined(_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
+#if !defined(_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(__MSYS__)
   static int saOrigValid=0;
   static struct sigaction saABRTOrig;
   static struct sigaction saSEGVOrig;
@@ -4006,7 +3997,7 @@
 
 bool SystemInformationImplementation::QueryCygwinMemory()
 {
-#ifdef __CYGWIN__
+#if defined __CYGWIN__ || defined __MSYS__
   // _SC_PAGE_SIZE does return the mmap() granularity on Cygwin,
   // see http://cygwin.com/ml/cygwin/2006-06/msg00350.html
   // Therefore just use 4096 as the page size of Windows.