diff --git a/Arduino.mk b/Arduino.mk
index 1c0debb..d974eb2 100644
--- a/Arduino.mk
+++ b/Arduino.mk
@@ -1293,7 +1293,7 @@ endif
 $(OBJDIR)/%.eep: $(OBJDIR)/%.elf $(COMMON_DEPS)
 	@$(MKDIR) $(dir $@)
 	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom='alloc,load' \
-		--change-section-lma .eeprom=0 -O ihex $< $@
+		--no-change-warnings --change-section-lma .eeprom=0 -O ihex $< $@
 
 $(OBJDIR)/%.lss: $(OBJDIR)/%.elf $(COMMON_DEPS)
 	@$(MKDIR) $(dir $@)
@@ -1439,7 +1439,7 @@ pre-build:
 		$(call runscript_if_exists,$(PRE_BUILD_HOOK))
 
 $(TARGET_ELF): 	$(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS)
-		$(CC) $(LDFLAGS) -o $@ $(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS) -lc -lm $(LINKER_SCRIPTS)
+		$(CC) $(LDFLAGS) -o $@ $(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS) $(OTHER_LIBS) -lc -lm $(LINKER_SCRIPTS)
 
 $(CORE_LIB):	$(CORE_OBJS) $(LIB_OBJS) $(PLATFORM_LIB_OBJS) $(USER_LIB_OBJS)
 		$(AR) rcs $@ $(CORE_OBJS) $(LIB_OBJS) $(PLATFORM_LIB_OBJS) $(USER_LIB_OBJS)
diff --git a/HISTORY.md b/HISTORY.md
index 3b53c83..a3611c8 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -12,6 +12,7 @@ I tried to give credit whenever possible. If I have missed anyone, kindly add it
 - Fix: ARDUINO_VERSION can cope with the longer 1.6.10 version string (issue #444) (https://github.com/sej7278)
 - Fix: Changed PARSE_BOARD to handle colons in e.g. CORE or VARIANT (issue #461) (https://github.com/sej7278)
 - Tweak: Documentation for Windows updated to include installation of PySerial (https://github.com/sovcik) 
+- FIX: Changed Teensy.mk to support Arduino 1.6.12 and Teensyduino 1.30 (issues #383 , #431) (https://github.com/georgeharker)
 
 ### 1.5.1 (Debian version: 1.5-3) (2016-02-22)
 
diff --git a/Teensy.mk b/Teensy.mk
index 3676c78..ffd3a6b 100644
--- a/Teensy.mk
+++ b/Teensy.mk
@@ -34,8 +34,8 @@ endif
 include $(ARDMK_DIR)/Common.mk
 
 ARDMK_VENDOR        = teensy
-ARDUINO_CORE_PATH   = $(ARDUINO_DIR)/hardware/teensy/cores/teensy3
-BOARDS_TXT          = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/boards.txt
+ARDUINO_CORE_PATH   = $(ARDUINO_DIR)/hardware/teensy/avr/cores/teensy3
+BOARDS_TXT          = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/avr/boards.txt
 
 ifndef F_CPU
     F_CPU=96000000
@@ -46,9 +46,20 @@ ifndef PARSE_TEENSY
     PARSE_TEENSY = $(shell grep -v "^\#" "$(BOARDS_TXT)" | grep $(1).$(2) | cut -d = -f 2,3 )
 endif
 
+# if boards.txt gets modified, look there, else hard code it
 ARCHITECTURE  = $(call PARSE_TEENSY,$(BOARD_TAG),build.architecture)
+ifeq ($(strip $(ARCHITECTURE)),)
+	ARCHITECTURE = arm
+endif
+
 AVR_TOOLS_DIR = $(call dir_if_exists,$(ARDUINO_DIR)/hardware/tools/$(ARCHITECTURE))
 
+# define plaform lib dir ignoring teensy's oversight on putting it all in avr
+ifndef ARDUINO_PLATFORM_LIB_PATH
+    ARDUINO_PLATFORM_LIB_PATH = $(ARDUINO_DIR)/hardware/$(ARDMK_VENDOR)/avr/libraries
+    $(call show_config_variable,ARDUINO_PLATFORM_LIB_PATH,[COMPUTED],(from ARDUINO_DIR))
+endif
+
 ########################################################################
 # command names
 
@@ -152,11 +163,30 @@ ifeq ("$(call PARSE_TEENSY,$(BOARD_TAG),build.elide_constructors)", "true")
     CXXFLAGS      += -felide-constructors
 endif
 
-LDFLAGS +=  $(call PARSE_TEENSY,$(BOARD_TAG),build.linkoption) $(call PARSE_TEENSY,$(BOARD_TAG),build.additionalobject)
+CXXFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.common)
+CXXFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.cpu)
+CXXFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.defs)
+CXXFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.cpp)
 
-ifneq ("$(call PARSE_TEENSY,$(BOARD_TAG),build.linkscript)",)
-    LDFLAGS   += -T$(ARDUINO_CORE_PATH)/$(call PARSE_TEENSY,$(BOARD_TAG),build.linkscript)
-endif
+CFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.common)
+CFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.cpu)
+CFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.defs)
+
+ASFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.common)
+ASFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.cpu)
+ASFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.defs)
+ASFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.S)
+
+LDFLAGS += $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.cpu)
+
+AMCU := $(call PARSE_TEENSY,$(BOARD_TAG),build.mcu)
+LDFLAGS += -Wl,--gc-sections,--relax
+LINKER_SCRIPTS = -T${ARDUINO_CORE_PATH}/${AMCU}.ld
+OTHER_LIBS = $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.libs)
+
+CPUFLAGS = $(call PARSE_TEENSY,$(BOARD_TAG),build.flags.cpu)
+# usually defined as per teensy31.build.mcu=mk20dx256 but that isn't valid switch
+MCU := $(shell echo ${CPUFLAGS} | sed -n -e 's/.*-mcpu=\([a-zA-Z0-9_-]*\).*/\1/p')
 
 ########################################################################
 # some fairly odd settings so that 'make upload' works
@@ -171,3 +201,4 @@ RESET_CMD = nohup $(ARDUINO_DIR)/hardware/tools/teensy_post_compile -board=$(BOA
 # automatially include Arduino.mk for the user
 
 include $(ARDMK_DIR)/Arduino.mk
+
diff --git a/arduino-mk-vars.md b/arduino-mk-vars.md
index 8c4d302..d52233b 100644
--- a/arduino-mk-vars.md
+++ b/arduino-mk-vars.md
@@ -888,6 +888,24 @@ OPTIMIZATION_LEVEL = 3
 
 ----
 
+### OTHER_LIBS
+
+**Description:**
+
+Additional Linker lib flags, for platform support
+
+Defaults to ""
+
+**Example:**
+
+```Makefile
+OTHER_LIBS = -lsomeplatformlib
+```
+
+**Requirement:** *Optional*
+
+----
+
 ### CFLAGS_STD
 
 **Description:**