diff --git a/SystemInformation.cxx b/SystemInformation.cxx
index 9e2a93d7c..9db1dee38 100644
--- a/SystemInformation.cxx
+++ b/SystemInformation.cxx
@@ -1471,7 +1471,7 @@ int SystemInformationImplementation::GetFullyQualifiedDomainName(
       {
       char host[NI_MAXHOST]={'\0'};
 
-      int addrlen
+      socklen_t addrlen
         = (fam==AF_INET?sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6));
 
       ierr=getnameinfo(
@@ -3487,7 +3487,7 @@ bool SystemInformationImplementation::QueryLinuxMemory()
     bool have[6] = { false, false, false, false, false, false };
     unsigned long value[6];
     int count = 0;
-    while(fgets(buffer, sizeof(buffer), fd))
+    while(fgets(buffer, static_cast<int>(sizeof(buffer)), fd))
       {
       for(int i=0; i < 6; ++i)
         {
diff --git a/SystemTools.cxx b/SystemTools.cxx
index 394d65e0d..158217e19 100644
--- a/SystemTools.cxx
+++ b/SystemTools.cxx
@@ -2742,14 +2742,23 @@ bool SystemTools::FileIsDirectory(const char* name)
     }
 
   // Remove any trailing slash from the name except in a root component.
-  char buffer[KWSYS_SYSTEMTOOLS_MAXPATH];
+  char local_buffer[KWSYS_SYSTEMTOOLS_MAXPATH];
+  std::string string_buffer;
   size_t last = length-1;
   if(last > 0 && (name[last] == '/' || name[last] == '\\')
     && strcmp(name, "/") !=0 && name[last-1] != ':')
     {
-    memcpy(buffer, name, last);
-    buffer[last] = 0;
-    name = buffer;
+    if(last < sizeof(local_buffer))
+      {
+      memcpy(local_buffer, name, last);
+      local_buffer[last] = 0;
+      name = local_buffer;
+      }
+    else
+      {
+      string_buffer.append(name, last);
+      name = string_buffer.c_str();
+      }
     }
 
   // Now check the file node type.
diff --git a/testIOS.cxx b/testIOS.cxx
index 3b971e268..f0c7f1a7b 100644
--- a/testIOS.cxx
+++ b/testIOS.cxx
@@ -48,7 +48,7 @@ int testIOS(int, char*[])
     return 1;
     }
   static const unsigned char array[] = { 0xff,0x4f,0xff,0x51,0x00,0x29,0x00,0x00,0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x3e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x3e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x01,0x01,0xff,0x52,0x00,0x0c,0x00,0x00,0x00,0x01,0x00,0x05,0x04,0x04,0x00,0x01,0xff,0x5c,0x00,0x13,0x40,0x40,0x48,0x48,0x50,0x48,0x48,0x50,0x48,0x48,0x50,0x48,0x48,0x50,0x48,0x48,0x50,0xff,0x64,0x00,0x2c,0x00,0x00,0x43,0x72,0x65,0x61,0x74,0x65,0x64,0x20,0x62,0x79,0x20,0x49,0x54,0x4b,0x2f,0x47,0x44,0x43,0x4d,0x2f,0x4f,0x70,0x65,0x6e,0x4a,0x50,0x45,0x47,0x20,0x76,0x65,0x72,0x73,0x69,0x6f,0x6e,0x20,0x31,0x2e,0x30,0xff,0x90,0x00,0x0a,0x00,0x00,0x00,0x00,0x06,0x2c,0x00,0x01,0xff,0x93,0xcf,0xb0,0x18,0x08,0x7f,0xc6,0x99,0xbf,0xff,0xc0,0xf8,0xc1,0xc1,0xf3,0x05,0x81,0xf2,0x83,0x0a,0xa5,0xff,0x10,0x90,0xbf,0x2f,0xff,0x04,0xa8,0x7f,0xc0,0xf8,0xc4,0xc1,0xf3,0x09,0x81,0xf3,0x0c,0x19,0x34 };
-  const unsigned int narray = sizeof(array); // 180
+  const size_t narray = sizeof(array); // 180
   kwsys_ios::stringstream strstr;
   strstr.write( (char*)array, narray );
   //strstr.seekp( narray / 2 ); // set position of put pointer in mid string
diff --git a/testSystemInformation.cxx b/testSystemInformation.cxx
index 49a686c17..738043f77 100644
--- a/testSystemInformation.cxx
+++ b/testSystemInformation.cxx
@@ -88,9 +88,9 @@ int testSystemInformation(int, char*[])
   printMethod3(info, GetHostMemoryUsed(), "KiB");
   printMethod3(info, GetProcMemoryUsed(), "KiB");
 
-  for (int i = 0; i <= 31; i++)
+  for (long int i = 0; i <= 31; i++)
     {
-    if (info.DoesCPUSupportFeature(1 << i))
+    if (info.DoesCPUSupportFeature(static_cast<long int>(1) << i))
       {
       kwsys_ios::cout << "CPU feature " << i << "\n";
       }