I've stumbled across this a few times. tree-switch-conversion.c
includes optabs.h and thus should depend on $(OPTABS_H).
Installed as obvious.
commit 7028127e5cdc8c8662a0850dcd3b08df10d229b3
Author: Jeff Law <l...@redhat.com>
Date: Thu May 16 21:31:09 2013 -0600
* Makefile.in (tree-switch-conversion.o): Depend on $(OPTABS_H).
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d2371ba..38e8f18 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2013-05-16 Jeff Law <l...@redhat.com>
+
+ * Makefile.in (tree-switch-conversion.o): Depend on $(OPTABS_H).
+
2013-05-16 Uros Bizjak <ubiz...@gmail.com>
* config/i386/driver-i386.c (host_detect_local_cpu): Determine
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 23e2926..63d114b 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -3068,7 +3068,7 @@ tree-switch-conversion.o : tree-switch-conversion.c
$(CONFIG_H) $(SYSTEM_H) \
$(TM_H) coretypes.h $(GIMPLE_H) $(CFGLOOP_H) \
$(TREE_PASS_H) $(FLAGS_H) $(EXPR_H) $(BASIC_BLOCK_H) \
$(GGC_H) $(OBSTACK_H) $(PARAMS_H) $(CPPLIB_H) $(PARAMS_H) \
- $(GIMPLE_PRETTY_PRINT_H) langhooks.h
+ $(GIMPLE_PRETTY_PRINT_H) langhooks.h $(OPTABS_H)
tree-complex.o : tree-complex.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TREE_H) \
$(TM_H) $(FLAGS_H) $(TREE_FLOW_H) $(TREE_HASHER_H) $(GIMPLE_H) \
$(CFGLOOP_H) tree-iterator.h $(TREE_PASS_H) tree-ssa-propagate.h
