Error

$ make
nspire-gcc -Os -nostdlib -I"c:/nRGBlib/sdk/include/" -c pong.c
nspire-ld -L "c:/nRGBlib/sdk/lib/" pong.o -o Pong.elf -lRGB
c:/program files (x86)/yagarto/bin/../lib/gcc/arm-none-eabi/4.6.2/../../..        /../arm-none-eabi/lib\libc.a(lib_a-rand.o): In function `rand':
C:\msys\1.0\home\yagarto\newlib-build\arm-none-eabi\newlib\libc\stdlib/../        ../../../../newlib-1.19.0/newlib/libc/stdlib/rand.c:81: multiple definitio        n of `rand'
c:/nRGBlib/sdk/lib/\libRGB.a(maths.o):maths.c:(.text+0x0): first defined h        ere
collect2: ld returned 1 exit status
make: *** [Pong.tns] Error 1