diff --git a/config/build/std_mb87q1100/rominfo.lnk b/config/build/std_mb87q1100/rominfo.lnk
index b6971f7..728b162 100644
--- a/config/build/std_mb87q1100/rominfo.lnk
+++ b/config/build/std_mb87q1100/rominfo.lnk
@@ -17,7 +17,7 @@
  *	ROM information linker script
  */
 
-OUTPUT_FORMAT("elf32-larm-tkernel", "elf32-barm-tkernel", "elf32-larm-tkernel")
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 
 PHDRS {
diff --git a/etc/mkiflib b/etc/mkiflib
index c16d106..6b66ddf 100755
--- a/etc/mkiflib
+++ b/etc/mkiflib
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     T-Kernel
diff --git a/etc/mktdsvc b/etc/mktdsvc
index 6ae4adb..3091b96 100755
--- a/etc/mktdsvc
+++ b/etc/mktdsvc
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     T-Kernel
diff --git a/etc/mktksvc b/etc/mktksvc
index d1a40f5..3ef72c2 100755
--- a/etc/mktksvc
+++ b/etc/mktksvc
@@ -1,4 +1,4 @@
-#! /usr/local/bin/perl
+#! /usr/bin/env perl
 #
 # ----------------------------------------------------------------------
 #     T-Kernel
diff --git a/etc/platform b/etc/platform
index 31c2695..865fb93 100755
--- a/etc/platform
+++ b/etc/platform
@@ -19,6 +19,7 @@ case $os in
   SunOS)	platform=$os-`uname -p` ;;
   Linux)	platform=$os-`uname -m` ;;
   FreeBSD)	platform=$os-`uname -p` ;;
+  OpenBSD)	platform=$os-`uname -m` ;;
   *)		platform=unknown ;;
 esac
 
diff --git a/etc/sysdepend/std_mb87q1100/makerules.sysdepend b/etc/sysdepend/std_mb87q1100/makerules.sysdepend
index 25144a9..e921963 100644
--- a/etc/sysdepend/std_mb87q1100/makerules.sysdepend
+++ b/etc/sysdepend/std_mb87q1100/makerules.sysdepend
@@ -38,11 +38,17 @@ endif
 ifneq ($(filter Linux-%, $(CROSS_ARCH)), )
   PATH := $(PATH):/usr/local/bin:/bin:/usr/bin
 endif
+ifneq ($(filter OpenBSD-%, $(CROSS_ARCH)), )
+  PATH := $(PATH):/usr/local/bin:/bin:/usr/bin
+endif
 
 # ----- T-Engine/MB87Q1100(ARM926EJ) ---------------------------------
 
 # GCC environment
 TARGET_ARCH =
+ifndef TOOL_PREFIX
+  TOOL_PREFIX = arm-none-eabi-
+endif
 
 # target type
 _CPUTYPE_FLAGS    = -march=armv4t -msoft-float
@@ -59,7 +65,7 @@ ASFLAGS +=
 LDFLAGS +=
 
 ### C  ###
-CC := $(GNUarm)/bin/gccarm
+CC := $(GNUarm)/bin/$(TOOL_PREFIX)gcc
 OUTPUT_OPTION = -o $@
 ifeq ($(mode), debug)
   CFLAGS += -g
@@ -87,7 +93,7 @@ LINK.c = $(CC) $(TARGET_ARCH) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS)
 	$(CC) $(TARGET_ARCH) $(CFLAGS) $(CPPFLAGS) -E $< $(OUTPUT_OPTION)
 
 ### C++ ###
-CXX := $(GNUarm)/bin/gccarm
+CXX := $(GNUarm)/bin/$(TOOL_PREFIX)gcc
 CXXFLAGS = $(CFLAGS)
 
 COMPILE.cc = $(CXX) $(TARGET_ARCH) $(CXXFLAGS) $(CPPFLAGS) -c
@@ -103,7 +109,7 @@ LINK.cc = $(CXX) $(TARGET_ARCH) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS)
 	$(CXX) $(TARGET_ARCH) $(CXXFLAGS) $(CPPFLAGS) -E $< $(OUTPUT_OPTION)
 
 ### asm ###
-AS = $(GNUarm)/bin/as
+AS = $(GNUarm)/bin/$(TOOL_PREFIX)as
 ifeq ($(mode), debug)
   ASFLAGS +=
 else
@@ -126,7 +132,7 @@ COMPILE.s = $(AS) $(ASFLAGS.s)
 	$(CC) $(TARGET_ARCH) $(ASFLAGS) $(CPPFLAGS) -E $< $(OUTPUT_OPTION)
 
 ### linker ###
-LD = $(GNUarm)/bin/ld
+LD = $(GNUarm)/bin/$(TOOL_PREFIX)ld
 ifeq ($(mode), debug)
   LDFLAGS += $(LIBDIR:%=-L%)
 else
@@ -174,15 +180,15 @@ LOCATE.o = $(CC) $(TARGET_ARCH) $(LDFLAGS) -nostdlib $(LDFLAGS3) $(START_ADR)
 	$(RM) _$@
 
 ### library ###
-AR = $(GNUarm)/bin/ar
+AR = $(GNUarm)/bin/$(TOOL_PREFIX)ar
 ARFLAGS = rv
-RANLIB = $(GNUarm)/bin/ranlib
+RANLIB = $(GNUarm)/bin/$(TOOL_PREFIX)ranlib
 
 (%): %
 	$(AR) $(ARFLAGS) $@ $%
 
 ### create name list ###
-NM = $(GNUarm)/bin/nm
+NM = $(GNUarm)/bin/$(TOOL_PREFIX)nm
 NMFLAGS = -n
 
 %.map: %
@@ -222,9 +228,9 @@ DATABOX = $(DB) $(DBFLAGS)
 
 ### other ###
 ifndef CPP
-  CPP = $(GNU_BD)/bin/arm-unknown-tkernel-cpp
+  CPP = $(GNUarm)/bin/$(TOOL_PREFIX)cpp
 endif
-STRIP = $(GNUarm)/bin/strip --strip-unneeded
+STRIP = $(GNUarm)/bin/$(TOOL_PREFIX)strip --strip-unneeded
 
-OBJCOPY = $(GNU_BD)/bin/arm-unknown-tkernel-objcopy
+OBJCOPY = $(GNUarm)/bin/$(TOOL_PREFIX)objcopy
 OUTPUT_SREC = -O srec --srec-forceS3 --srec-len 32
diff --git a/kernel/sysdepend/device/std_mb87q1100/cntwus.c b/kernel/sysdepend/device/std_mb87q1100/cntwus.c
index f3c1bb5..1a866e3 100644
--- a/kernel/sysdepend/device/std_mb87q1100/cntwus.c
+++ b/kernel/sysdepend/device/std_mb87q1100/cntwus.c
@@ -27,8 +27,8 @@
  */
 LOCAL void WaitLoop( UW count )
 {
-	Asm("	_loop:	subs	%0, %0, #1	\n"
-	"		bhi	_loop		"
+	Asm("	0:	subs	%0, %0, #1	\n"
+	"		bhi	0b		"
 		: "=r"(count)
 		: "0"(count + 1)
 	);
diff --git a/kernel/sysmain/build/std_mb87q1100/kernel-ram.lnk b/kernel/sysmain/build/std_mb87q1100/kernel-ram.lnk
index 47bf0af..a6b4f82 100644
--- a/kernel/sysmain/build/std_mb87q1100/kernel-ram.lnk
+++ b/kernel/sysmain/build/std_mb87q1100/kernel-ram.lnk
@@ -17,7 +17,7 @@
  *	linker script (RAM)
  */
 
-OUTPUT_FORMAT("elf32-larm-tkernel", "elf32-barm-tkernel", "elf32-larm-tkernel")
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 ENTRY(_start)
 
@@ -79,4 +79,8 @@ SECTIONS
 		_end = .;
 		PROVIDE (end = .);
 	} /*:data*/
+	/DISCARD/ : {
+		*(.ARM.exidx*);
+		*(.gnu.linkonce.armeixidex.*);
+	}	
 }
diff --git a/kernel/sysmain/build/std_mb87q1100/kernel-rom.lnk b/kernel/sysmain/build/std_mb87q1100/kernel-rom.lnk
index c200513..31325f5 100644
--- a/kernel/sysmain/build/std_mb87q1100/kernel-rom.lnk
+++ b/kernel/sysmain/build/std_mb87q1100/kernel-rom.lnk
@@ -17,7 +17,7 @@
  *	linker script (ROM)
  */
 
-OUTPUT_FORMAT("elf32-larm-tkernel", "elf32-barm-tkernel", "elf32-larm-tkernel")
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
 OUTPUT_ARCH(arm)
 ENTRY(_start)
 
@@ -75,4 +75,8 @@ SECTIONS {
 		_end = .;
 		PROVIDE (end = .);
 	}
+	/DISCARD/ : {
+		*(.ARM.exidx*);
+		*(.gnu.linkonce.armeixidex.*);
+	}	
 }
diff --git a/kernel/sysmain/src/Makefile.common b/kernel/sysmain/src/Makefile.common
index 5752899..4f74e5e 100644
--- a/kernel/sysmain/src/Makefile.common
+++ b/kernel/sysmain/src/Makefile.common
@@ -116,18 +116,18 @@ $(TARGET_ROM:%.rom=%.mot): $(TARGET_ROM)
 	$(OBJCOPY) $(OUTPUT_SREC) $< $@
 
 tkernel:
-	( cd $(OBJ_TKERNEL_PATH) ; make )
+	( cd $(OBJ_TKERNEL_PATH) ; $(MAKE) )
 
 sysmgr:
-	( cd $(OBJ_SYSMGR_PATH) ; make )
+	( cd $(OBJ_SYSMGR_PATH) ; $(MAKE) )
 
 sysinit:
-	( cd $(OBJ_SYSINIT_PATH) ; make )
+	( cd $(OBJ_SYSINIT_PATH) ; $(MAKE) )
 
 clean:
-	( cd $(OBJ_TKERNEL_PATH) ; make clean )
-	( cd $(OBJ_SYSMGR_PATH) ; make clean )
-	( cd $(OBJ_SYSINIT_PATH) ; make clean )
+	( cd $(OBJ_TKERNEL_PATH) ; $(MAKE) clean )
+	( cd $(OBJ_SYSMGR_PATH) ; $(MAKE) clean )
+	( cd $(OBJ_SYSINIT_PATH) ; $(MAKE) clean )
 	$(RM) $(OBJ) $(TARGET_CRT0) $(ALL) $(DEPS)
 
 install: $(addprefix $(EXE_INSTALLDIR)/, $(ALL))
diff --git a/lib/build/Makefile.common b/lib/build/Makefile.common
index 90dc95e..e4f5027 100644
--- a/lib/build/Makefile.common
+++ b/lib/build/Makefile.common
@@ -28,20 +28,20 @@ all: $(LIB_SYSDEP_TARGET) $(LIB_CPUDEP_TARGET)
 
 $(LIB_SYSDEP_TARGET):
 	cd ../../$@/build/$(TETYPE)_$(MACHINE) ; \
-	make ; \
-	make install
+	$(MAKE) ; \
+	$(MAKE) install
 
 $(LIB_CPUDEP_TARGET):
 	cd ../../$@/build/$(MACHINE) ; \
-	make ; \
-	make install
+	$(MAKE) ; \
+	$(MAKE) install
 
 clean:
 	@( cd ../.. ; \
 	for dir in $(LIB_SYSDEP_TARGET); do \
-		( cd $$dir/build/$(TETYPE)_$(MACHINE) ; make clean ) ; \
+		( cd $$dir/build/$(TETYPE)_$(MACHINE) ; $(MAKE) clean ) ; \
 	done ; \
 	for dir in $(LIB_CPUDEP_TARGET); do \
-		( cd $$dir/build/$(MACHINE) ; make clean ) ; \
+		( cd $$dir/build/$(MACHINE) ; $(MAKE) clean ) ; \
 	done ) ;
 	rm -rf $(addsuffix .a, $(LIB_ARCHIVE_OBJ)) *.o \#*.o.* \#*.a.*