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building arm native toolchain using crosstools

Hi,
  I have built cross tools for my arm target using kegal's cross tools.
   My combinations is gcc 3.4.4. bin utils - 2.15 glibc2.3.5

  I have 3 questions
   1) I dont know if i need to use soft-float option or not - my board
       has a VFP.
       Should i use soft-float option or not?.

   2) I have been able to build cross tools for my target arm.
       Now, i want to build native compilers for my target arm.

Can i use cross-tools to do that?.If so, how?

  3) compilers that i have build does not have code for arm v6 architecture.
      how do i build gcc to generate code for armv6.
      (I did use -march=armv6 - it says its invalid switch).

Thanks and regards,
sriram

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