Hrm, sorry, I have no idea as I am using the same version without problem (on windows).
I assume you didn't change anything related before compiling and that you are using the makefile to build?
Code:
C:\Users\dan\Desktop\mf>avr-gcc -v
Using built-in specs.
Target: avr
Configured with: ../gcc-4.3.3/configure --enable-win32-registry=WinAVR-20100110
--with-gmp=/usr/local --with-mpfr=/usr/local --prefix=/c/WinAVR --target=avr --e
nable-languages=c,c++,objc --with-dwarf2 --enable-doc --disable-shared --disable
-libada --disable-libssp --disable-nls --with-pkgversion='WinAVR 20100110' --wit
h-bugurl='URL:http://sourceforge.net/tracker/?atid=520074&group_id=68108&func=br
owse'
Thread model: single
gcc version 4.3.3 (WinAVR 20100110)
EDIT: I am using LUFA101122
As a matter of interest, cd into the LUFA directory and run "make" (do "make clean" first if its not already clean). Does this build without error?
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