SunPro: Make sure all known versions get CXX98 defaults

Modules/Compiler/SunPro-CXX.cmake

@@ -43,9 +43,9 @@ if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13)
   set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=c++11")
   set(CMAKE_CXX_LINK_WITH_STANDARD_COMPILE_OPTION 1)
 else()
-  set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-library=stlport")
-  set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-library=stlport")
+  set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-library=stlport4")
+  set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-library=stlport4")
   set(CMAKE_CXX_LINK_WITH_STANDARD_COMPILE_OPTION 1)
 endif()
 
-__compiler_check_default_language_standard(CXX 5.13 98)
+__compiler_check_default_language_standard(CXX 1 98)