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GCC installation

R A

HI,
I have installed the GCC tool-chain v4.1.1 from http://www.gnuarm.com/ binaries.
and i have added the prefixes arm-elf- and inside misc of CC: -msoft-float and in assembler -mno-fpu.
I still get errors:
1./cygdrive/e/Softwares/GNUARM/Bin/../lib/gcc/arm-elf/4.1.1/../../../../arm-elf/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008000
2.startup.o: In function 'LoopZI':
3. /cygdrive/h/Ex3/FFT/startup.s(168): error: undefined reference to '_data'

Any solution.?
thanx

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