Hi Ulf, In your situation, don't use a C bitfield. Use a C char for your struct data member, where the lsb (or msb) is your bit of interest, and the other 7 bits are fallow. On most platforms, a C char is an octet (8 bits). It has the packing you want, without using GCC-isms to contort a natural machine word (i.e., an int) into unaligned access (as you are doing with your bitfield struct). Some architectures do not work with unaliagned word access. HTH, --Eljay
