Equivalent in CC for cc's __attribute__((aligned((8)))

Question

I want to read 3rd party genaterated binary data e.g.
struct t_simple_str
     char c;
     double d;
};where d has an offset of 8 byte.
Using SunStudio's 12U1 cc 32-bit compiler on Linux the default offset of d is 4 but with
struct t_simple_str
     char c;
     double d __attribute__((aligned(8)));
};I can achieve that th double is recognized at the correct offset.
Since I have to use the C++ compiler that doesn't support __attribute__((aligned(8)))
I want to know if there is a equivalent feature that calculates the correct offset.
I did some unsuccessful tests with #pragma align 8 (...)
but according documentation it doesn't work on local variables.
Can anybody give me a hint?

Answer 1

The "aligned" attribute is not yet implemented in the C++ compiler, although it is on our list of things to do.
Perhaps you could add a dummy field:
struct t_simple_str
     char c;
     char dummy[7]; // force d to offset 8
     double d;
}; as a more-portable alternative.
Please also note that the "aligned" attribute does not force an offset; it forces an alignment.