>the following C code > >typedef struct { > int32_t a; > void *b; >} S; > >compiled for my linux x86_64 using the amd64 ABI (-march=athlon64) with gcc >3.4.4 prints "a=0 b=1" > >i have seen why and it is clear to me how a such result is produced. >i think that it is not a bug and that the structure can not be compared using >'memcmp'. > >do you agree or it a bug ? You can use memcmp if you fill up the struct with a dummy value that you can set explicitely. Or use a memset(&a, 0, sizeof(S)) before doing any work. Both are workarounds but I wouldn't say that it's a bug. bye Fabi