First hunk: lld complains about .gcc_except_table referencing
symbols in discarded sections.  Tell gcc to split .gcc_except_table
so that its unused parts can also be discarded.

Index: libcc1/Makefile.in
--- libcc1/Makefile.in.orig
+++ libcc1/Makefile.in
@@ -387,7 +387,7 @@ CPPFLAGS_FOR_C_FAMILY = -I $(srcdir)/../gcc/c-family \
 CPPFLAGS_FOR_C = $(CPPFLAGS_FOR_C_FAMILY) -I $(srcdir)/../gcc/c
 CPPFLAGS_FOR_CXX = $(CPPFLAGS_FOR_C_FAMILY) -I $(srcdir)/../gcc/cp
 AM_CXXFLAGS = $(WARN_FLAGS) $(WERROR) $(visibility) $(CET_HOST_FLAGS) \
-	$(am__append_1)
+	$(am__append_1) $(PORTS_FORCE_SPLIT_SECTIONS)
 # Can be simplified when libiberty becomes a normal convenience library.
 libiberty_normal = ../libiberty/libiberty.a
 libiberty_noasan = ../libiberty/noasan/libiberty.a
@@ -405,6 +405,8 @@ cc1libdir = $(libdir)/$(libsuffix)
 shared_source = callbacks.cc callbacks.hh connection.cc connection.hh \
     marshall.cc marshall.hh rpc.hh status.hh
 
+include $(top_srcdir)/../libversions
+
 marshall_c_source = marshall-c.hh
 marshall_cxx_source = marshall-cp.hh
 libcc1plugin_la_LDFLAGS = -module -export-symbols $(srcdir)/libcc1plugin.sym
@@ -414,6 +416,7 @@ libcc1plugin_la_LIBADD = $(libiberty)
 libcc1plugin_la_DEPENDENCIES = $(libiberty_dep)
 libcc1plugin_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CXXLD) $(AM_CXXFLAGS) \
+	$(LIBcc1plugin_LTVERSION) \
 	$(CXXFLAGS) $(libcc1plugin_la_LDFLAGS) $(LTLDFLAGS) -o $@
 
 libcp1plugin_la_LDFLAGS = -module -export-symbols $(srcdir)/libcp1plugin.sym
@@ -423,6 +426,7 @@ libcp1plugin_la_LIBADD = $(libiberty)
 libcp1plugin_la_DEPENDENCIES = $(libiberty_dep)
 libcp1plugin_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CXXLD) $(AM_CXXFLAGS) \
+	$(LIBcp1plugin_LTVERSION) \
 	$(CXXFLAGS) $(libcp1plugin_la_LDFLAGS) $(LTLDFLAGS) -o $@
 
 LTLDFLAGS = $(shell $(SHELL) $(top_srcdir)/../libtool-ldflags $(LDFLAGS))
@@ -435,6 +439,7 @@ libcc1_la_LIBADD = $(libiberty)
 libcc1_la_DEPENDENCIES = $(libiberty_dep)
 libcc1_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
 	$(LIBTOOLFLAGS) --mode=link $(CXXLD) $(AM_CXXFLAGS) \
+	$(LIBcc1_LTVERSION) \
 	$(CXXFLAGS) $(libcc1_la_LDFLAGS) $(LTLDFLAGS) -o $@
 
 all: cc1plugin-config.h