diff --git a/Source/CTest/cmCTestUpdateHandler.h b/Source/CTest/cmCTestUpdateHandler.h
index 954c024f11..d2423c0d5f 100644
--- a/Source/CTest/cmCTestUpdateHandler.h
+++ b/Source/CTest/cmCTestUpdateHandler.h
@@ -17,10 +17,6 @@
 #include "cmCTestGenericHandler.h"
 #include "cmListFileCache.h"
 
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma set woff 1375 /* base class destructor not virtual */
-#endif
-
 /** \class cmCTestUpdateHandler
  * \brief A class that handles ctest -S invocations
  *
@@ -70,8 +66,4 @@ private:
   bool SelectVCS();
 };
 
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma reset woff 1375 /* base class destructor not virtual */
-#endif
-
 #endif
diff --git a/Source/CursesDialog/cmCursesStandardIncludes.h b/Source/CursesDialog/cmCursesStandardIncludes.h
index 791ac9b594..6047ec579b 100644
--- a/Source/CursesDialog/cmCursesStandardIncludes.h
+++ b/Source/CursesDialog/cmCursesStandardIncludes.h
@@ -22,25 +22,6 @@
 
 #include <form.h>
 
-// This is a hack to prevent warnings about these functions being
-// declared but not referenced.
-#if defined(__sgi) && !defined(__GNUC__)
-class cmCursesStandardIncludesHack
-{
-public:
-  enum
-  {
-    Ref1 = sizeof(cfgetospeed(0)),
-    Ref2 = sizeof(cfgetispeed(0)),
-    Ref3 = sizeof(tcgetattr(0, 0)),
-    Ref4 = sizeof(tcsetattr(0, 0, 0)),
-    Ref5 = sizeof(cfsetospeed(0,0)),
-    Ref6 = sizeof(cfsetispeed(0,0))
-  };
-};
-#endif
-
-
 // on some machines move erase and clear conflict with stl
 // so remove them from the namespace
 inline void curses_move(unsigned int x, unsigned int y)
diff --git a/Source/cmGeneratedFileStream.h b/Source/cmGeneratedFileStream.h
index 7adee7b7d0..2aa6bebdbc 100644
--- a/Source/cmGeneratedFileStream.h
+++ b/Source/cmGeneratedFileStream.h
@@ -15,10 +15,6 @@
 #include "cmStandardIncludes.h"
 #include <cmsys/FStream.hxx>
 
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma set woff 1375 /* base class destructor not virtual */
-#endif
-
 // This is the first base class of cmGeneratedFileStream.  It will be
 // created before and destroyed after the ofstream portion and can
 // therefore be used to manage the temporary file.
@@ -146,8 +142,4 @@ private:
   cmGeneratedFileStream(cmGeneratedFileStream const&); // not implemented
 };
 
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma reset woff 1375 /* base class destructor not virtual */
-#endif
-
 #endif
diff --git a/Source/cmStandardIncludes.h b/Source/cmStandardIncludes.h
index e4f576006b..692e94b3b7 100644
--- a/Source/cmStandardIncludes.h
+++ b/Source/cmStandardIncludes.h
@@ -37,28 +37,6 @@
 // Provide fixed-size integer types.
 #include <cmIML/INT.h>
 
-#include <stdarg.h> // Work-around for SGI MIPSpro 7.4.2m header bug
-
-// This is a hack to prevent warnings about these functions being
-// declared but not referenced.
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma set woff 3970 /* conversion from pointer to same-sized */
-# include <sys/termios.h>
-class cmStandardIncludesHack
-{
-public:
-  enum
-  {
-    Ref1 = sizeof(cfgetospeed(0)),
-    Ref2 = sizeof(cfgetispeed(0)),
-    Ref3 = sizeof(tcgetattr(0, 0)),
-    Ref4 = sizeof(tcsetattr(0, 0, 0)),
-    Ref5 = sizeof(cfsetospeed(0,0)),
-    Ref6 = sizeof(cfsetispeed(0,0))
-  };
-};
-#endif
-
 // Include stream compatibility layer from KWSys.
 // This is needed to work with large file support
 // on some platforms whose stream operators do not
@@ -146,17 +124,6 @@ extern int putenv (char *__string) __THROW;
 #define for if(false) {} else for
 #endif
 
-// check for the 720 compiler on the SGI
-// which has some strange properties that I don't think are worth
-// checking for in a general way in configure
-#if defined(__sgi) && !defined(__GNUC__)
-#  if   (_COMPILER_VERSION >= 730)
-#   define CM_SGI_CC_730
-#  elif (_COMPILER_VERSION >= 720)
-#   define CM_HAS_STD_BUT_NOT_FOR_IOSTREAM
-#  endif
-#endif
-
 #ifdef __DECCXX_VER
 # if __DECCXX_VER <= 60390008
 #  define CM_HAS_STD_BUT_NOT_FOR_IOSTREAM
@@ -208,11 +175,7 @@ inline bool operator!=(std::string const& a, const char* b)
 
 inline bool operator==(std::string const& a, const char* b)
 { return (a==std::string(b)); }
-# endif  // end CM_SGI_CC_720
-
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma set woff 1375 /* base class destructor not virtual */
-#endif
+# endif  // end CM_HAS_STD_BUT_NOT_FOR_IOSTREAM
 
 // use this class to shrink the size of symbols in .o files
 // std::string is really basic_string<....lots of stuff....>
@@ -327,10 +290,6 @@ public:
   typedef Superclass::const_iterator const_iterator;
 };
 
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma reset woff 1375 /* base class destructor not virtual */
-#endif
-
 // All subclasses of cmCommand or cmCTestGenericHandler should
 // invoke this macro.
 #define cmTypeMacro(thisClass,superclass) \
diff --git a/Source/cmStandardLexer.h b/Source/cmStandardLexer.h
index 981e03ec86..bd08ac7daf 100644
--- a/Source/cmStandardLexer.h
+++ b/Source/cmStandardLexer.h
@@ -25,12 +25,6 @@
 # pragma warning ( disable : 4786 )
 #endif
 
-/* Make sure SGI termios does not define ECHO differently.  */
-#if defined(__sgi) && !defined(__GNUC__)
-# include <sys/termios.h>
-# undef ECHO
-#endif
-
 /* Define isatty on windows.  */
 #if defined(_WIN32) && !defined(__CYGWIN__)
 # include <io.h>
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 1c8c387882..1d36ff5b55 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -79,10 +79,6 @@ public:
 #endif
 };
 
-#if defined(__sgi) && !defined(__GNUC__)
-# pragma set woff 1375 /* base class destructor not virtual */
-#endif
-
 #if !defined(HAVE_ENVIRON_NOT_REQUIRE_PROTOTYPE)
 // For GetEnvironmentVariables
 # if defined(_WIN32)