Revise mongo install docs for OS X

https://jira.mongodb.org/browse/PHP-1373


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335984 c90b9560-bf6c-de11-be94-00142212c4b1

reference/mongo/configure.xml

@@ -162,13 +162,6 @@ extension=php_mongo.dll
 
   <section xml:id="mongo.installation.osx">
    <title>OS X</title>
-
-   <para>
-    If your system is unable to find autoconf, you'll need to install Xcode 
-    (available on your installation DVD or as a free download from the Apple 
-    website).
-   </para>
-   
    <para>
     In most cases installing from pecl is the easiest way:
     <programlisting role="shell">
@@ -178,15 +171,34 @@ $ sudo pecl install mongo
     </programlisting>
    </para>
    <para>
-    If you are using XAMPP, you may be able to compile the driver with the 
-    following command:
+    If you are using <link xlink:href="&url.mac.homebrew;">Homebrew</link>, the
+    PHP tap includes formulae for the driver. For example, you might install the
+    driver for PHP 5.6 using the following command:
+    <programlisting role="shell">
+<![CDATA[
+$ brew install php56-mongo
+]]>
+    </programlisting>
+   </para>
+   <para>
+    If you are using <link xlink:href="&url.xampp;">XAMPP</link>, note that it
+    has its own pecl binary and php.ini configuration. You should be able to
+    install the driver with the following command:
     <programlisting role="shell">
 <![CDATA[
 $ sudo /Applications/XAMPP/xamppfiles/bin/pecl install mongo
 ]]>
     </programlisting>
    </para>
-
+   <note>
+   <title>Xcode dependency for compiling on OS X</title>
+   <para>
+    Compiling the driver on OS X will require Xcode developer tools, which may
+    be installed with <code>xcode-select --install</code>. If that command is
+    not available, you may first need to install the
+    <link xlink:href="&url.apple.clt;">Command Line Tools</link> package.
+   </para>
+  </note>
   </section>
 
   <section xml:id="mongo.installation.gentoo">