Hi Minkyu Kang,
I am getting the following warning messages in the latest u-boot-samsung tree.
/usr/local/arm/arm-2011.09/bin/arm-none-eabi-ld: warning: /usr/local/arm/arm-2011.09/bin/../lib/gcc/arm-none-eabi/4.6.1/libgcc.a(bpabi.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail /usr/local/arm/arm-2011.09/bin/arm-none-eabi-ld: warning: /usr/local/arm/arm-2011.09/bin/../lib/gcc/arm-none-eabi/4.6.1/libgcc.a(_divdi3.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail /usr/local/arm/arm-2011.09/bin/arm-none-eabi-ld: warning: /usr/local/arm/arm-2011.09/bin/../lib/gcc/arm-none-eabi/4.6.1/libgcc.a(_udivdi3.o) uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail