diff --git a/arch/x86/kernel/Makefile.arch b/arch/x86/kernel/Makefile.arch
index 254fb1ea..993bdd29 100644
--- a/arch/x86/kernel/Makefile.arch
+++ b/arch/x86/kernel/Makefile.arch
@@ -2,4 +2,6 @@ IHK_OBJS += cpu.o interrupt.o memory.o trampoline.o local.o context.o
 IHK_OBJS += perfctr.o syscall.o vsyscall.o
 # POSTK_DEBUG_ARCH_DEP_18 coredump arch separation.
 # IHK_OBJS added coredump.o
+ifeq ($(ARCH), arm64)
 IHK_OBJS += coredump.o
+endif
diff --git a/executer/kernel/mcctrl/Makefile.in b/executer/kernel/mcctrl/Makefile.in
index f8727a14..291b84cc 100644
--- a/executer/kernel/mcctrl/Makefile.in
+++ b/executer/kernel/mcctrl/Makefile.in
@@ -10,16 +10,21 @@ obj-m += mcctrl.o
 
 # POSTK_DEBUG_ARCH_DEP_1, arch depend "-mcmodel"
 # POSTK_DEBUG_ARCH_DEP_83, arch depend translate_rva_to_rpa() move
-#ccflags-y := -I$(IHK_BASE)/linux/include -I$(IHK_BASE)/linux/include/ihk/arch/$(ARCH) -I$(IHK_BASE)/ikc/include -I$(IHK_BASE)/ikc/include/ikc/arch/$(ARCH) -I$(IHK_BASE)/include -I$(IHK_BASE)/include/arch/$(ARCH) -I$(src)/../../include -mcmodel=kernel -mno-red-zone -DMCEXEC_PATH=\"$(BINDIR)/mcexec\" -I@abs_builddir@
+ifeq ($(ARCH), arm64)
 ccflags-y := -I$(IHK_BASE)/linux/include -I$(IHK_BASE)/linux/include/ihk/arch/$(ARCH) -I$(IHK_BASE)/ikc/include -I$(IHK_BASE)/ikc/include/ikc/arch/$(ARCH) -I$(IHK_BASE)/include -I$(IHK_BASE)/include/arch/$(ARCH) -I$(src)/../../include -I$(src)/arch/$(ARCH)/include -DMCEXEC_PATH=\"$(BINDIR)/mcexec\" -I@abs_builddir@
-
+else
+ccflags-y := -I$(IHK_BASE)/linux/include -I$(IHK_BASE)/linux/include/ihk/arch/$(ARCH) -I$(IHK_BASE)/ikc/include -I$(IHK_BASE)/ikc/include/ikc/arch/$(ARCH) -I$(IHK_BASE)/include -I$(IHK_BASE)/include/arch/$(ARCH) -I$(src)/../../include -mcmodel=kernel -mno-red-zone -DMCEXEC_PATH=\"$(BINDIR)/mcexec\" -I@abs_builddir@
+endif
 
 mcctrl-y := driver.o control.o ikc.o syscall.o procfs.o binfmt_mcexec.o
 mcctrl-y += sysfs.o sysfs_files.o arch/$(ARCH)/archdeps.o
 
 KBUILD_EXTRA_SYMBOLS = @abs_builddir@/../../../../ihk/linux/core/Module.symvers
+
+ifeq ($(ARCH), arm64)
 EXTRA_CFLAGS += $(foreach i, $(shell seq 1 100), $(addprefix -DPOSTK_DEBUG_ARCH_DEP_, $(i)))
 EXTRA_CFLAGS += $(foreach i, $(shell seq 1 100), $(addprefix -DPOSTK_DEBUG_TEMP_FIX_, $(i)))
+endif
 
 .PHONY: clean install modules
 
diff --git a/executer/user/Makefile.in b/executer/user/Makefile.in
index e35ca76b..3281bbbd 100644
--- a/executer/user/Makefile.in
+++ b/executer/user/Makefile.in
@@ -26,8 +26,10 @@ ifeq ($(ENABLE_QLMPI),yes)
 	TARGET+= libqlmpi.so ql_server ql_mpiexec_start ql_mpiexec_finalize ql_talker libqlfort.so
 endif
 
+ifeq ($(ARCH), arm64)
 CFLAGS += $(foreach i, $(shell seq 1 100), $(addprefix -DPOSTK_DEBUG_ARCH_DEP_, $(i)))
 CFLAGS += $(foreach i, $(shell seq 1 100), $(addprefix -DPOSTK_DEBUG_TEMP_FIX_, $(i)))
+endif
 
 all: $(TARGET)
 
@@ -35,10 +37,13 @@ mcexec: mcexec.c libmcexec.a
 	$(CC) -I${KDIR} $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) -DLIBDIR=\"$(LIBDIR)\" -fPIE -pie -L. $(MCEXEC_LIBS) -o $@ $^ $(EXTRA_OBJS) $(RPATH)
 
 # POSTK_DEBUG_ARCH_DEP_34, eclair arch depend separate.
-#eclair: eclair.c
-#	$(CC) $(CFLAGS) -I${IHKDIR} -o $@ $^ $(LIBS)
+ifeq ($(ARCH), arm64)
 eclair: eclair.c arch/$(ARCH)/arch-eclair.c
 	$(CC) -I.. -I. -I./arch/$(ARCH)/include -I$(VPATH)/.. -I$(VPATH) -I$(VPATH)/arch/$(ARCH)/include -I${IHKDIR} $(CFLAGS) -o $@ $^ $(LIBS)
+else
+eclair: eclair.c
+	$(CC) $(CFLAGS) -I${IHKDIR} -o $@ $^ $(LIBS)
+endif
 
 libsched_yield: libsched_yield.c
 	$(CC) -shared -fPIC -Wl,-soname,sched_yield.so.1 -o libsched_yield.so.1.0.0 $^ -lc -ldl
diff --git a/kernel/Makefile.build.in b/kernel/Makefile.build.in
index 2a319005..598a6ad0 100644
--- a/kernel/Makefile.build.in
+++ b/kernel/Makefile.build.in
@@ -9,7 +9,9 @@ OBJS += rbtree.o
 OBJS += pager.o
 # POSTK_DEBUG_ARCH_DEP_18 coredump arch separation.
 # OBJS added gencore.o
+ifeq ($(ARCH), arm64)
 OBJS += gencore.o
+endif
 DEPSRCS=$(wildcard $(SRC)/*.c)
 
 CFLAGS += -I$(SRC)/include -I@abs_builddir@/../ -I@abs_builddir@/include -D__KERNEL__  -g -fno-omit-frame-pointer -fno-inline -fno-inline-small-functions
@@ -17,7 +19,9 @@ LDFLAGS += -e arch_start
 IHKOBJ = ihk/ihk.o
 
 # POSTK_DEBUG_ARCH_DEP_24
+ifeq ($(ARCH), arm64)
 default: all
+endif
 
 include $(SRC)/config/config.$(TARGET)
 include @abs_builddir@/../../ihk/cokernel/Makefile.common
@@ -28,8 +32,11 @@ OBJDUMP ?= objdump
 OBJCOPY ?= objcopy
 
 # POSTK_DEBUG_ARCH_DEP_26
-#SUBCMD_OPTS = TARGET=$(TARGET) O=$(CURDIR)/ihk CC=$(CC) LD=$(LD) SRC=$(SRC)
+ifeq ($(ARCH), arm64)
 SUBCMD_OPTS = TARGET=$(TARGET) O=$(CURDIR)/ihk CC=$(CC) LD=$(LD) OBJCOPY=$(OBJCOPY) SRC=$(SRC)
+else
+SUBCMD_OPTS = TARGET=$(TARGET) O=$(CURDIR)/ihk CC=$(CC) LD=$(LD) SRC=$(SRC)
+endif
 
 ld_kern_cmd_base = $(LD) $(LDFLAGS) -o $@.elf $^
 mkimage_cmd_base = [ -f $(SRC)/script/mkimage.$(TARGET) ] && CC=$(CC) LD=$(LD) LDFLAGS="$(LDFLAGS_MKIMAGE)" OBJDUMP=$(OBJDUMP) OBJCOPY=$(OBJCOPY) sh $(SRC)/script/mkimage.$(TARGET) '$@.elf' '$@' '$(SRC)' || cp $@.elf $@
diff --git a/kernel/include/elfcore.h b/kernel/include/elfcore.h
index e8de229f..9d7a1395 100644
--- a/kernel/include/elfcore.h
+++ b/kernel/include/elfcore.h
@@ -116,4 +116,10 @@ struct thread;
 extern void arch_fill_prstatus(struct elf_prstatus64 *prstatus, struct thread *thread, void *regs0);
 
 #endif /* __HEADER_ELFCORE_H */
+#else /* POSTK_DEBUG_ARCH_DEP_18 */
+#ifdef __x86_64
+#include "../../arch/x86/kernel/include/elfcore.h"
+#elif __aarch64__
+#include "../../arch/arm64/kernel/include/elfcore.h"
+#endif
 #endif /* POSTK_DEBUG_ARCH_DEP_18 */
diff --git a/kernel/include/elfcoregpl.h b/kernel/include/elfcoregpl.h
index 2e59fb9e..4568f6f7 100644
--- a/kernel/include/elfcoregpl.h
+++ b/kernel/include/elfcoregpl.h
@@ -64,4 +64,10 @@ struct elf_prpsinfo64
 };
 
 #endif /* __HEADER_ELFCOREGPL_H */
+#else /* POSTK_DEBUG_ARCH_DEP_18 */
+#ifdef __x86_64
+#include "../../arch/x86/kernel/include/elfcoregpl.h"
+#elif __aarch64__
+#include "../../arch/arm64/kernel/include/elfcoregpl.h"
+#endif
 #endif /* POSTK_DEBUG_ARCH_DEP_18 */