[Linaro-uefi] question on EDK build patch step

Hi,

I am trying to build edk by following the steps in readme file. For some reason, I am unable to patch the files. Getting following error:

edk2> patch -p1 < ArmPlatformPkg/Documentation/patches/BaseTools-Pending-Patches.patch

patching file BaseTools/Source/C/GenFw/Elf32Convert.c

Hunk #1 FAILED at 1.

Hunk #2 FAILED at 18.

Hunk #3 FAILED at 264.

Hunk #4 FAILED at 291.

Hunk #5 FAILED at 315.

5 out of 5 hunks FAILED -- saving rejects to file BaseTools/Source/C/GenFw/Elf32Convert.c.rej

patching file BaseTools/Source/C/GenFw/Elf64Convert.c

Hunk #1 FAILED at 19.

Hunk #2 FAILED at 258.

Hunk #3 FAILED at 286.

Hunk #4 FAILED at 310.

4 out of 4 hunks FAILED -- saving rejects to file BaseTools/Source/C/GenFw/Elf64Convert.c.rej

Please help.

Thanks, Ravi C