not ok 9 - 1073741824 + 1073741824 : got -2147483648, expected 2147483648.
#   Failed test '1073741824 + 1073741824 : got -2147483648, expected 2147483648.'
#   at ../math-anyint/test.pl line 28.
#          got: '-2147483648'
#     expected: '2147483648'
not ok 10 - Testing NERDVANA's C additon calc()
#   Failed test 'Testing NERDVANA's C additon calc()'
#   at ../math-anyint/test.pl line 34.
#          got: '-2147483648'
#     expected: '2147483648'
1..10
# Looks like you failed 2 tests of 10.

##</code><code>##

use strict;
use warnings;

use Inline C => <<'EOC';

/* As the function appears in AnyInt.pm */
long calc_32bit_signed_in_C(long input) {
  return (int32_t)((int32_t)input);
}

/* The same function, renamed to begin with an
   underscore, and return type altered to int */
int _calc_32bit_signed_in_C(int input) {
  return (int32_t)((int32_t)input);
}

EOC

print calc_32bit_signed_in_C(1073741824 + 1073741824), "\n";
print _calc_32bit_signed_in_C(1073741824 + 1073741824), "\n";

__END__

Outputs:
-2147483648
-2147483648

##</code><code>##

2147483648
2147483648