diff --git a/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.properties b/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.properties
index b6eb4cb9230..ea1c1abd6ae 100644
--- a/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.properties
+++ b/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.properties
@@ -141,7 +141,9 @@ Option.Posix.Warn.Pedandic=Pedantic (-pedantic)
 Option.Posix.Warn.PedErrors=Pedantic warnings as errors (-pedantic-errors)
 Option.Posix.Warn.nowarn=Inhibit all warnings (-w)
 Option.Posix.Warn.allwarn=All warnings (-Wall)
+Option.Posix.Warn.extrawarn=Extra warnings (-Wextra)
 Option.Posix.Warn.toerrs=Warnings as errors (-Werror)
+Option.Posix.Warn.wconversion=Implicit conversion warnings (-Wconversion)
 
 Option.Posix.Verbose=Verbose (-v)
 Option.OtherFlags=Other flags
diff --git a/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.xml b/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.xml
index ddc4c317689..146c331769c 100644
--- a/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.xml
+++ b/build/org.eclipse.cdt.managedbuilder.gnu.ui/plugin.xml
@@ -1202,6 +1202,14 @@
 			  id="gnu.c.compiler.option.warnings.allwarn"
 			  valueType="boolean">
 		  </option>
+		  <option
+			  defaultValue="false"
+			  name="%Option.Posix.Warn.extrawarn"
+			  category="gnu.c.compiler.category.warnings"
+			  command="-Wextra"
+			  id="gnu.c.compiler.option.warnings.extrawarn"
+			  valueType="boolean">
+		  </option>
 		  <option
 			  defaultValue="false"
 			  name="%Option.Posix.Warn.toerrs"
@@ -1210,6 +1218,14 @@
 			  id="gnu.c.compiler.option.warnings.toerrors"
 			  valueType="boolean">
 		  </option>
+		  <option
+			  defaultValue="false"
+			  name="%Option.Posix.Warn.wconversion"
+			  category="gnu.c.compiler.category.warnings"
+			  command="-Wconversion"
+			  id="gnu.c.compiler.option.warnings.wconversion"
+			  valueType="boolean">
+		  </option>
 		  <optionCategory
 			  owner="cdt.managedbuild.tool.gnu.c.compiler"
 			  name="%OptionCategory.Misc"
@@ -1516,6 +1532,14 @@
 			  id="gnu.cpp.compiler.option.warnings.allwarn"
 			  valueType="boolean">
 		  </option>
+		  <option
+			  defaultValue="false"
+			  name="%Option.Posix.Warn.extrawarn"
+			  category="gnu.cpp.compiler.category.warnings"
+			  command="-Wextra"
+			  id="gnu.cpp.compiler.option.warnings.extrawarn"
+			  valueType="boolean">
+		  </option>
 		  <option
 			  defaultValue="false"
 			  name="%Option.Posix.Warn.toerrs"
@@ -1524,6 +1548,14 @@
 			  id="gnu.cpp.compiler.option.warnings.toerrors"
 			  valueType="boolean">
 		  </option>
+		  <option
+			  defaultValue="false"
+			  name="%Option.Posix.Warn.wconversion"
+			  category="gnu.cpp.compiler.category.warnings"
+			  command="-Wconversion"
+			  id="gnu.cpp.compiler.option.warnings.wconversion"
+			  valueType="boolean">
+		  </option>
 		  <optionCategory
 			  owner="cdt.managedbuild.tool.gnu.cpp.compiler"
 			  name="%OptionCategory.Misc"