Changes between Version 10 and Version 11 of Guidelines/WarningsGuidelines

Timestamp:

Jan 11, 2011, 2:39:00 AM (12 years ago)

Author:

phorgan1

Comment:

--

Guidelines/WarningsGuidelines

@@ -304 +304 @@
 
 ==== Turning off warnings locally ====
-So.  Suppose you are getting a warning and have checked the code and are '''sure''' that it's a spurious warning.  There's nothing wrong.  '''If''' the warning is controllable via a command line -W option, then you can (if you have GCC version '''4.2''' or newer) turn it off temporarily.  First you need to find out what the option might be, then if it exists turn it off via a pragma.  How you do this varies a bit with GCC version.
+So.  Suppose you are getting a warning and have checked the code and are '''sure''' that it's a spurious warning.  There's nothing wrong.  '''If''' the warning is controllable via a command line -W option, then you can (if you have GCC version '''4.2.4''' or newer) turn it off temporarily.  First you need to find out what the option might be, then if it exists turn it off via a pragma.  How you do this varies a bit with GCC version.
 
  -fdiagnostics-show-option::
-  In GCC, for versions 4.3 and higher, this option instructs the diagnostic machinery to add text to each diagnostic emitted, which indicates which command line option directly controls that diagnostic, when such an option is known to the diagnostic machinery.
+  In GCC, for versions 4.2.4 and higher, this option instructs the diagnostic machinery to add text to each diagnostic emitted, which indicates which command line option directly controls that diagnostic, when such an option is known to the diagnostic machinery.
  #pragma GCC diagnostic push::
   Available since GCC version 4.6, this pragma lets you remember diagnostic options in place at a particular time.  This pragma can occur on any line of a file.
@@ -313 +313 @@
   Available since GCC version 4.6, this pragma lets you restore diagnostic options that were remembered by a diagnostic push. This pragma can occur on any line of a file.
  #pragma GCC diagnostic [warning|error|ignored] OPTION::
-  After GCC version 4.1 and before GCC version 4.6 this could be specified at file scope outside of any functions, classes, unions, structs, or methods, to change the behavior when a particular class of error was seen.  For GCC version 4.6 and later, it can be put in any line of a file, and affects from that position forward.  For any supported version, it only works with warnings that have explicit -W arguments, use -fdiagnostic-show-option to find out which one to use.  An example: #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
-So prior to 4.6 just put near the top of the file something like:
+  From GCC version 4.2.4 and before GCC version 4.6 this could be specified at file scope outside of any functions, classes, unions, structs, or methods, to change the behavior when a particular class of error was seen.  For GCC version 4.6 and later, it can be put in any line of a file, and affects from that position forward.  For any supported version, it only works with warnings that have explicit -W arguments, use -fdiagnostic-show-option to find out which one to use.  An example: #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+
+So starting from 4.2.4 but before 4.6, just put near the top of the file something like:
 
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations