diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a2d2107a05a..35be7f1a317 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,15 @@
+2012-01-09  Benjamin Kosnik  <bkoz@redhat.com>
+
+	* fragment.am (WARN_CXXFLAGS): Add -Wabi.
+	* Makefile.in: Regenerate.
+	* doc/Makefile.in: Same.
+	* include/Makefile.in: Same.
+	* libsupc++/Makefile.in: Same.
+	* src/Makefile.in: Same.
+	* testsuite/Makefile.in: Same.
+	* po/Makefile.in: Same.
+	* python/Makefile.in: Same.
+
 2012-01-08  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
 	* python/libstdcxx/v6/printers.py (StdForwardListPrinter): Add.
diff --git a/libstdc++-v3/Makefile.in b/libstdc++-v3/Makefile.in
index 2284126ab06..368f896a24e 100644
--- a/libstdc++-v3/Makefile.in
+++ b/libstdc++-v3/Makefile.in
@@ -296,7 +296,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/doc/Makefile.in b/libstdc++-v3/doc/Makefile.in
index 472ed5466c2..c79af0f4cd2 100644
--- a/libstdc++-v3/doc/Makefile.in
+++ b/libstdc++-v3/doc/Makefile.in
@@ -280,7 +280,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/fragment.am b/libstdc++-v3/fragment.am
index cae1ffd56f6..2bcbc1ab3d3 100644
--- a/libstdc++-v3/fragment.am
+++ b/libstdc++-v3/fragment.am
@@ -18,7 +18,7 @@ toolexeclibdir = $(glibcxx_toolexeclibdir)
 CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 # -I/-D flags to pass when compiling.
 AM_CPPFLAGS = $(GLIBCXX_INCLUDES)
diff --git a/libstdc++-v3/include/Makefile.in b/libstdc++-v3/include/Makefile.in
index fec2d94bf7b..f701c66c35e 100644
--- a/libstdc++-v3/include/Makefile.in
+++ b/libstdc++-v3/include/Makefile.in
@@ -270,7 +270,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/libsupc++/Makefile.in b/libstdc++-v3/libsupc++/Makefile.in
index 2cc92ec1889..6d9364efd12 100644
--- a/libstdc++-v3/libsupc++/Makefile.in
+++ b/libstdc++-v3/libsupc++/Makefile.in
@@ -330,7 +330,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/po/Makefile.in b/libstdc++-v3/po/Makefile.in
index 0226b894a6e..fa72b85b0a2 100644
--- a/libstdc++-v3/po/Makefile.in
+++ b/libstdc++-v3/po/Makefile.in
@@ -270,7 +270,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/python/Makefile.in b/libstdc++-v3/python/Makefile.in
index ca046cf0a33..4f2bf5c5cf8 100644
--- a/libstdc++-v3/python/Makefile.in
+++ b/libstdc++-v3/python/Makefile.in
@@ -294,7 +294,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/src/Makefile.in b/libstdc++-v3/src/Makefile.in
index 4b2646e4a05..5c0747e93f9 100644
--- a/libstdc++-v3/src/Makefile.in
+++ b/libstdc++-v3/src/Makefile.in
@@ -334,7 +334,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.
diff --git a/libstdc++-v3/testsuite/Makefile.in b/libstdc++-v3/testsuite/Makefile.in
index af161ea5d26..236b4610d40 100644
--- a/libstdc++-v3/testsuite/Makefile.in
+++ b/libstdc++-v3/testsuite/Makefile.in
@@ -273,7 +273,7 @@ CONFIG_CXXFLAGS = \
 	$(SECTION_FLAGS) $(EXTRA_CXX_FLAGS) -frandom-seed=$@
 
 WARN_CXXFLAGS = \
-	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once
+	$(WARN_FLAGS) $(WERROR) -fdiagnostics-show-location=once -Wabi
 
 
 # -I/-D flags to pass when compiling.