On Wednesday 25 January 2006 10:20, Igor Bukanov wrote:
> Is there any option to ask GCC to print various size and alignment
> info on the target platform? This would be very nice during cross
> compilation when one can not run the executables to autoconfigure for
> such parameters.
>
> Currently I consider for that a hack like copiling the following source:
>
> #include <stddef.h>
> union aligned_fields {
> double d;
> void (*f)();
> ...
> };
>
> struct align_test {
> union aligned_fields u1;
> char c;
> };
Autoconf already has tests for things like this. Something along the lines of:
const char D_P_S_4[sizeof(void *) == 4 : -1 : 1];
const char D_P_S_8[sizeof(void *) == 8 : -1 : 1];
Then see which compiles, or grep the error messages.
Paul
