diff --git a/Arduino.mk b/Arduino.mk
index 0a0fd75..a403342 100644
--- a/Arduino.mk
+++ b/Arduino.mk
@@ -241,6 +241,9 @@ arduino_output =
 # running for the first time (i.e., not after a restart after
 # regenerating the dependency file), then output the configuration.
 ifndef ARDUINO_QUIET
+    ARDUINO_QUIET = 0
+endif
+ifeq ($(ARDUINO_QUIET),0)
     ifeq ($(MAKE_RESTARTS),)
         ifeq ($(MAKELEVEL),0)
             arduino_output = $(info $(1))
@@ -922,6 +925,10 @@ ifeq ($(strip $(NO_CORE)),)
         CORE_CPP_SRCS   = $(wildcard $(ARDUINO_CORE_PATH)/*.cpp)
         CORE_AS_SRCS    = $(wildcard $(ARDUINO_CORE_PATH)/*.S)
 
+        # ArduinoCore-API
+        CORE_C_SRCS    += $(wildcard $(ARDUINO_CORE_PATH)/api/*.c)
+        CORE_CPP_SRCS  += $(wildcard $(ARDUINO_CORE_PATH)/api/*.cpp)
+
         # USB Core if samd or sam
         ifeq ($(findstring sam, $(strip $(ARCHITECTURE))), sam)
             CORE_C_SRCS    += $(wildcard $(ARDUINO_CORE_PATH)/avr/*.c) # avr core emulation files
@@ -1156,7 +1163,7 @@ endif
 
 # Using += instead of =, so that CPPFLAGS can be set per sketch level
 CPPFLAGS      += -$(MCU_FLAG_NAME)=$(MCU) -DF_CPU=$(F_CPU) -DARDUINO=$(ARDUINO_VERSION) $(ARDUINO_ARCH_FLAG) \
-        -I$(ARDUINO_CORE_PATH) -I$(ARDUINO_VAR_PATH)/$(VARIANT) \
+        -I$(ARDUINO_CORE_PATH) -I$(ARDUINO_CORE_PATH)/api -I$(ARDUINO_VAR_PATH)/$(VARIANT) \
         $(SYS_INCLUDES) $(PLATFORM_INCLUDES) $(USER_INCLUDES) -Wall -ffunction-sections \
         -fdata-sections
 
@@ -1539,7 +1546,11 @@ endif
 # -D - Disable auto erase for flash memory
 # Note: -D is needed for Mega boards.
 #       (See https://github.com/sudar/Arduino-Makefile/issues/114#issuecomment-25011005)
-AVRDUDE_ARD_OPTS = -D -c $(AVRDUDE_ARD_PROGRAMMER) -b $(AVRDUDE_ARD_BAUDRATE) -P
+ifeq ($(AVRDUDE_AUTOERASE_FLASH), yes)
+else
+    AVRDUDE_ARD_OPTS = -D
+endif
+AVRDUDE_ARD_OPTS += -c $(AVRDUDE_ARD_PROGRAMMER) -b $(AVRDUDE_ARD_BAUDRATE) -P
 ifeq ($(CURRENT_OS), WINDOWS)
     # get_monitor_port checks to see if the monitor port exists, assuming it is
     # a file. In Windows, avrdude needs the port in the format 'com1' which is
diff --git a/HISTORY.md b/HISTORY.md
index 04ff1e4..8f228fe 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -11,6 +11,7 @@ I tried to give credit whenever possible. If I have missed anyone, kindly add it
 - Fix: Quote the prefix tag in the space_pad_to function
 - Fix: recognize serial monitors with full path in MONITOR_CMD
 - Fix: Grab USB_PRODUCT and USB_MANUFACTURER from boards.txt for 32u4 boards (issue #594).
+- Fix: Show the configuration when ARDUINO_QUIET=0
 - Tweak: Move chip erase flag from set_fuses to ispload to prevent sketch being nuked when setting fuses
 - Tweak: Set ARDMK_VERSION to 1.6 (https://github.com/sej7278)
 - Tweak: Move non-standard-related items from CxxFLAGS_STD to CxxFLAGS (issue #523) (https://github.com/sej7278)
@@ -30,6 +31,7 @@ I tried to give credit whenever possible. If I have missed anyone, kindly add it
 - New: Add support for BOARD_CLOCK for board.menu.speed and board.menu.clock entries in boards.txt files. (https://github.com/dewhisna)
 - New: Updated Arch instructions. (https://github.com/Akram-Chehaima)
 - New: Add support for Robotis OpenCR 1.0 boards.
+- New: Build the ArduinoCore API
 
 ### 1.6.0 (2017-07-11)
 - Fix: Allowed for SparkFun's weird usb pid/vid submenu shenanigans (issue #499). (https://github.com/sej7278)
diff --git a/Teensy.mk b/Teensy.mk
index d4f23bc..35107ac 100644
--- a/Teensy.mk
+++ b/Teensy.mk
@@ -114,7 +114,7 @@ LDFLAGS += $(call PARSE_BOARD,$(BOARD_TAG),build.flags.cpu)
 
 AMCU := $(call PARSE_BOARD,$(BOARD_TAG),build.mcu)
 LDFLAGS += -Wl,--gc-sections,--relax
-LINKER_SCRIPTS = -T${ARDUINO_CORE_PATH}/${AMCU}.ld
+LINKER_SCRIPTS ?= -T${ARDUINO_CORE_PATH}/${AMCU}.ld
 OTHER_LIBS = $(call PARSE_BOARD,$(BOARD_TAG),build.flags.libs)
 
 CPUFLAGS = $(call PARSE_BOARD,$(BOARD_TAG),build.flags.cpu)
diff --git a/arduino-mk-vars.md b/arduino-mk-vars.md
index 3ee05d0..85fbd9f 100644
--- a/arduino-mk-vars.md
+++ b/arduino-mk-vars.md
@@ -1308,6 +1308,24 @@ AVRDUDE_CONF = /usr/share/arduino/hardware/tools/avrdude.conf
 
 ----
 
+### AVRDUDE_AUTOERASE_FLASH
+
+**Description:**
+
+Enable autoerase flash.
+
+By default disabled.
+
+**Example:**
+
+```Makefile
+AVRDUDE_AUTOERASE_FLASH = yes
+```
+
+**Requirement:** *Optional*
+
+----
+
 ### AVR_TOOLS_PATH
 
 **Description:**