re PR preprocessor/7602 (C++ header files found in CPLUS_INCLUDE_PATH treated as C headers)

	PR preprocessor/7602
	* cppinit.c (path_include): Treat the system environment
	variables as being cxx_aware.

From-SVN: r56416

gcc/ChangeLog

+2002-08-18  Neil Booth  <neil@daikokuya.co.uk>
+
+	PR preprocessor/7602
+	* cppinit.c (path_include): Treat the system environment
+	variables as being cxx_aware.
+
 2002-08-17  Joseph S. Myers  <jsm@polyomino.org.uk>
 
 	* c-decl.c (flexible_array_type_p): New function.

gcc/cppinit.c

@@ -178,7 +178,7 @@ path_include (pfile, list, path)
 	  name[q - p] = 0;
 	}
 
-      append_include_chain (pfile, name, path, 0);
+      append_include_chain (pfile, name, path, path == SYSTEM);
 
       /* Advance past this name.  */
       if (*q == 0)