This is an alignment bug. The file lib/Geo/LibProj/FFI.pm or rather the
module Convert::Binary::C doesn't take into account that pointers are
32-bits long on armhf but that double struct members are 8-byte aligned.
The tests in t/lists.t pass if the alignment is set to 8 on armhf.
This Perl scripts outputs 20 on armhf but should output 24.
use 5.036;
use Convert::Binary::C;
my $c = Convert::Binary::C->new;
//my $c = Convert::Binary::C->new(Alignment => 8);
$c->parse(<<ENDC);
struct PJ_UNITS {
const char *id;
const char *to_meter;
const char *name;
//char pad[4];
double factor;
};
ENDC
say $c->sizeof('PJ_UNITS');
The C program below outputs 24.
#include <stdio.h>
struct PJ_UNITS {
const char *id;
const char *to_meter;
const char *name;
//char pad[4];
double factor;
};
int
main(void)
{
printf("%ld\n", (long) sizeof(struct PJ_UNITS));
return 0;
}
