re PR pch/35027 ("too short to be a PCH file" warning should be conditional on -Winvalid-PCH)

2008-02-23  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        PR pch/35027
        * c-pch.c (c_common_valid_pch): Make the "too short to be a PCH
        file" warning condtional on -Winvalid-PCH.

From-SVN: r132574

gcc/ChangeLog

+2008-02-23  Andrew Pinski  <andrew_pinski@playstation.sony.com>
+
+	PR pch/35027
+	* c-pch.c (c_common_valid_pch): Make the "too short to be a PCH
+	file" warning condtional on -Winvalid-PCH.
+
 2008-02-23  Daniel Jacobowitz  <dan@codesourcery.com>
 
 	* expmed.c (extract_bit_field): Always use adjust_address for MEM.

gcc/c-pch.c

@@ -243,8 +243,9 @@ c_common_valid_pch (cpp_reader *pfile, const char *name, int fd)
     fatal_error ("can%'t read %s: %m", name);
   else if (sizeread != IDENT_LENGTH + 16)
     {
-      cpp_error (pfile, CPP_DL_WARNING, "%s: too short to be a PCH file",
-		 name);
+      if (cpp_get_options (pfile)->warn_invalid_pch)
+	cpp_error (pfile, CPP_DL_WARNING, "%s: too short to be a PCH file",
+		   name);
       return 2;
     }