quote:

---

VA_X.dll file version 10.9.2332.2 Atmel built 2019.05.20
AtmelStudio
msenv.dll version 14.0.23107.0
Comctl32.dll version 6.10.7601.18837
Windows 7 6.1 Build 7601 Service Pack 1
4 processors (x86-64, WOW64)
Language info: 1252, 0x409

---

struct MyStuct
{
    struct __attribute__ ((packed))
    {
        unsigned flag1 : 1;
        unsigned flag2 : 1;
        unsigned flag3 : 1;
        unsigned flag4 : 1;
        unsigned flag5 : 1;
    };
    // Additional members to follow
};

#define bitfield  struct __attribute__ ((packed))

struct MyStuct
{
    bitfield
    {
        unsigned flag1 : 1;
        unsigned flag2 : 1;
        unsigned flag3 : 1;
        unsigned flag4 : 1;
        unsigned flag5 : 1;
    };
};