another little problem i think its not big thing

after make:

arm-elf-gcc -c -Wall -O2 -mcpu=arm7tdmi-s -D BAUDRATE=19200 -o main.o 
main.c
arm-elf-gcc -c -Wall -O2 -mcpu=arm7tdmi-s -D BAUDRATE=19200 -o EC3550.o 
EC3550.c

arm-elf-gcc -c -Wall -O2 -mcpu=arm7tdmi-s -D BAUDRATE=19200 -o uart.o 
uart.c
arm-elf-as -mapcs-32 -mcpu=arm7tdmi -o crt.o crt.s
arm-elf-ld -Tlpc2378_flash.ld -o main.elf main.o EC3550.o uart.o crt.o
arm-elf-ld: region ram is full (main.elf section .kex)
make: *** [main.elf] Error 1

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attached are my makefile and the error pic.