sbmp cleaning, sbmp now works ok

Makefile

@@ -39,7 +39,7 @@ USE_OPENSDK?=yes
 
 #Esptool.py path and port
 ESPTOOL		?= esptool.py
-ESPPORT		?= /dev/ttyUSB0
+ESPPORT		?= /dev/ttyUSBblack
 #ESPDELAY indicates seconds to wait between flashing the two binary images
 ESPDELAY	?= 3
 ESPBAUD		?= 115200
@@ -62,10 +62,10 @@ LIBS += esphttpd
 # compiler flags using during compilation of source files
 CFLAGS		= -Os -ggdb -std=gnu99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inline-functions \
 		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH \
-		-Wno-address
+		-Wno-address -ffunction-sections
 
 # linker flags used to generate the main object file
-LDFLAGS		= -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static
+LDFLAGS		= -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static -Wl,--gc-sections
 
 
 # various paths from the SDK used in this project