Add documentation on -Weverything.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137911 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/docs/UsersManual.html b/docs/UsersManual.html
index 639892714e..4bf550d777 100644
--- a/docs/UsersManual.html
+++ b/docs/UsersManual.html
@@ -39,6 +39,7 @@ td {
    <li><a href="#diagnostics_categories">Diagnostic Categories</a></li>
    <li><a href="#diagnostics_commandline">Controlling Diagnostics via Command Line Flags</a></li>
    <li><a href="#diagnostics_pragmas">Controlling Diagnostics via Pragmas</a></li>
+   <li><a href="#diagnostics_enable_everything">Enabling All Warnings</a></li>
    <li><a href="#analyzer_diagnositics">Controlling Static Analyzer Diagnostics</a></li>
    </ul>
   </li>
@@ -626,6 +627,16 @@ GCC do not support the exact same set of warnings, so even when using GCC
 compatible #pragmas there is no guarantee that they will have identical behaviour
 on both compilers. </p>
 
+<h4 id="diagnostics_enable_everything">Enabling All Warnings</h4>
+
+<p>In addition to the traditional <tt>-W</tt> flags, one can enable <b>all</b>
+   warnings by passing <tt>-Weverything</tt>. 
+   This works as expected with <tt>-Werror</tt>,
+   and also includes the warnings from <tt>-pedantic</tt>.</p>
+   
+<p>Note that when combined with <tt>-w</tt> (which disables all warnings), that
+  flag wins.</p>
+
 <h4 id="analyzer_diagnositics">Controlling Static Analyzer Diagnostics</h4>
 
 <p>While not strictly part of the compiler, the diagnostics from Clang's <a