Hi, I would like to use C++ for 8-bit AVR CPUs, so saving space would be important. I found that the constructors and destructors always have two instances, which are exactly the same. I tried it for X86, X86/64, M68k, and AVR platforms, with the same result, so it is not platform-dependent. Here is a disassembled example: 000000f8 <valami::valami()>: f8: fc 01 movw r30, r24 fa: 84 e0 ldi r24, 0x04 ; 4 fc: 91 e0 ldi r25, 0x01 ; 1 fe: 91 83 std Z+1, r25 ; 0x01 100: 80 83 st Z, r24 102: 13 82 std Z+3, r1 ; 0x03 104: 12 82 std Z+2, r1 ; 0x02 106: 08 95 ret 00000108 <valami::valami()>: 108: fc 01 movw r30, r24 10a: 84 e0 ldi r24, 0x04 ; 4 10c: 91 e0 ldi r25, 0x01 ; 1 10e: 91 83 std Z+1, r25 ; 0x01 110: 80 83 st Z, r24 112: 13 82 std Z+3, r1 ; 0x03 114: 12 82 std Z+2, r1 ; 0x02 116: 08 95 ret Is it possible to switch off this behavior? Regards, Gyorgy Kovesdi