diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index ea390a5bbea..9268851c44a 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -851,7 +851,7 @@ endif
 # libgcc_eh.a, only LIB2ADDEH matters.  If we do, only LIB2ADDEHSTATIC and
 # LIB2ADDEHSHARED matter.  (Usually all three are identical.)
 
-c_flags := -fexceptions
+c_flags := -fexceptions -mforce-l32
 
 ifeq ($(enable_shared),yes)
 
@@ -874,7 +874,7 @@ endif
 # Build LIBUNWIND. Use -fno-exceptions so that the unwind library does
 # not generate calls to __gcc_personality_v0.
 
-c_flags := -fno-exceptions
+c_flags := -fno-exceptions -mforce-l32
 
 libunwind-objects += $(addsuffix $(objext),$(basename $(notdir $(LIBUNWIND))))
 
diff --git a/libstdc++-v3/libsupc++/Makefile.in b/libstdc++-v3/libsupc++/Makefile.in
index 8bf86f35af6..b6adcc7ab49 100644
--- a/libstdc++-v3/libsupc++/Makefile.in
+++ b/libstdc++-v3/libsupc++/Makefile.in
@@ -335,7 +335,7 @@ toolexeclibdir = $(glibcxx_toolexeclibdir)
 # These bits are all figured out from configure.  Look in acinclude.m4
 # or configure.ac to see how they are set.  See GLIBCXX_EXPORT_FLAGS.
 CONFIG_CXXFLAGS = \
-	$(SECTION_FLAGS) $(HWCAP_FLAGS) -frandom-seed=$@
+	$(SECTION_FLAGS) $(HWCAP_FLAGS) -frandom-seed=$@ -mforce-l32
 
 WARN_CXXFLAGS = \
 	$(WARN_FLAGS) $(WERROR_FLAG) -fdiagnostics-show-location=once