winegcc: Add Macho-o lib detection support

[Charles Davis]

On 11/8/10 10:52 AM, André Hentschel wrote:
> @@ -321,7 +321,8 @@ static int check_platform( struct options *opts, const char *file )
>          unsigned char header[16];
>          if (read( fd, header, sizeof(header) ) == sizeof(header))
>          {
> -            /* FIXME: only ELF is supported, platform is not checked beyond 32/64 */
> +            /* FIXME: only ELF and Macho-o is supported, platform is not checked beyond 32/64 */
Typo 'Macho-o'.
> @@ -331,6 +332,15 @@ static int check_platform( struct options *opts, const char *file )
>                      ret = (opts->force_pointer_size == 4 ||
>                             (!opts->force_pointer_size && opts->target_cpu != CPU_x86_64));
>              }
> +            /* Big Endian or Little Endian Mach-o File */
> +            else if (!memcmp( header, "\376\355\372\316", 4 ) || !memcmp( header, "\316\372\355\376", 4 ))
For 64-bit files, the magic number is 0xfeedfacf, not 0xfeedface.
(Notice how the 64-bit magic is one more than the 32-bit magic.) You
should check for that, too.

I would like to take this time to point out that on Mac OS, there are no
separate 32-bit and 64-bit library directories (i.e. no lib32 and lib64,
only lib). If you want a 32-bit and a 64-bit version of a binary or
library installed, you're expected to build a fat binary/library. Nearly
all of the system libraries and binaries installed with Mac OS X are in
fact fat.

Chip