--- /dev/null
+/*
+ * This file is included in every header that needs the STLport library to be
+ * built; the header files mostly are the iostreams-headers. The file checks for
+ * _STLP_USE_NO_IOSTREAMS or _STLP_NO_IOSTREAMS being not defined, so that the
+ * iostreams part of STLport cannot be used when the symbols were defined
+ * accidentally.
+ */
+#if defined (_STLP_NO_IOSTREAMS)
+# error STLport iostreams header cannot be used; you chose not to use iostreams in the STLport configuration file (stlport/stl/config/user_config.h).
+#elif defined (_STLP_USE_NO_IOSTREAMS )
+# error STLport iostreams header cannot be used; your compiler do not support it.
+#endif