remove circular dependence in Makefile

Thanks, Sebastien!

Makefile.in

@@ -294,7 +294,9 @@ deps += $$($(2)_deps)
 
 test_outs += $$($(2)_test_outs)
 
-install_hdrs += $$(addprefix $(src_dir)/$(1)/, $$($(2)_hdrs))
+vpath %.h $$(src_dir)/$$(1)
+
+install_hdrs += $$($(2)_hdrs)
 install_libs += lib$(1).a
 install_exes += $$($(2)_install_prog_exes)
 
@@ -329,7 +331,7 @@ check : $(test_outs)
 
 install-hdrs : $(install_hdrs)
 	$(MKINSTALLDIRS) $(install_hdrs_dir)
-	for file in $(install_hdrs); \
+	for file in $^; \
   do \
     $(INSTALL_HDR) $$file $(install_hdrs_dir); \
   done

riscv/riscv.mk.in

@@ -2,7 +2,7 @@ riscv_subproject_deps = \
 	softfloat_riscv \
 	softfloat \
 
-riscv_hdrs = \
+repo_hdrs := \
 	htif.h \
 	common.h \
 	decode.h \
@@ -12,10 +12,14 @@ riscv_hdrs = \
 	trap.h \
 	opcodes.h \
 	insn_header.h \
-	dispatch.h \
 	cachesim.h \
 	memtracer.h \
 
+riscv_hdrs := \
+	$(repo_hdrs) \
+	dispatch.h
+
+
 NDISPATCH := 10
 DISPATCH_SRCS := \
 	dispatch0.cc \
@@ -30,10 +34,10 @@ DISPATCH_SRCS := \
 	dispatch9.cc \
 	dispatch10.cc \
 
-$(DISPATCH_SRCS): %.cc: dispatch $(wildcard insns/*.h) $(riscv_hdrs)
+$(DISPATCH_SRCS): %.cc: dispatch $(wildcard insns/*.h) $(riscv_hdrs) 
 	$< $(subst dispatch,,$(subst .cc,,$@)) $(NDISPATCH) 1024 < $(src_dir)/riscv/opcodes.h > $@
 
-dispatch.h: %.h: dispatch $(riscv_hdrs)
+dispatch.h: %.h: dispatch $(repo_hdrs)
 	$< $(NDISPATCH) 1024 < $(src_dir)/riscv/opcodes.h > $@
 
 riscv_srcs = \