Kernel build: region ram is full

Kernel build fails at this point:

init/.version.o.d: done.
  LD      init/built-in.o
  LD      .tmp_vmlinux1
nios2-elf-ld: region ram is full (.tmp_vmlinux1 section .text). Region needs to be 1447228 bytes larger.
nios2-elf-ld: region ram is full (.tmp_vmlinux1 section .data). Region needs to be 57344 bytes larger.
nios2-elf-ld: region ram is full (.tmp_vmlinux1 section .init). Region needs to be 64524 bytes larger.
nios2-elf-ld: region ram is full (.tmp_vmlinux1 section .bss). Region needs to be 65076 bytes larger.
nios2-elf-ld: region ram is full (.tmp_vmlinux1 section .sbss). Region needs to be 63 bytes larger.
nios2-elf-ld: section .data  overlaps section .text 
nios2-elf-ld: section .init  overlaps section .text 
nios2-elf-ld: section .bss  overlaps section .text 
nios2-elf-ld: section .sbss  overlaps section .text 
make: ***  Error 1
make: ***  Error 2
make: Leaving directory `/cygdrive/c/Development/Altera/NiosII/bin/eclipse/plugins/com.microtronix.nios2linux.kernel_1.4.0/linux-2.6.x'

I try to make a kernel for a custom board with DDR2-SDRAM.