SunPro: set -library=stlport as standard compile option for C++98

Modules/Compiler/SunPro-CXX.cmake

@@ -42,6 +42,10 @@ if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.13)
   set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++11")
   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_CXX_LINK_WITH_STANDARD_COMPILE_OPTION 1)
 endif()
 
 __compiler_check_default_language_standard(CXX 5.13 98)