Arm structure alignment

[Shaun Jackman]

I'm porting a legacy app and need binary compatibility with the structures
written to disk.
Can I force GCC to pack *all* structures from the command line? to avoid going
through all the sources and adding __attribute__((packed)) to all the structure
definitions.

A seperate question... where exactly does the above magic string go?

I have a struct of the form...
struct mystruct {
  char bytes[6];
};
which gcc is insisting on padding to 8 bytes and is causing me unlimited
problems.

What's the effect of...

struct mystruct {
  char bytes[6] __attribute__((packed));
};

struct mystruct {
  char bytes[6];
} __attribute__((packed));

struct mystruct {
  char bytes[6] __attribute__((packed));
} __attribute__((packed));

Thanks,
Shaun


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