[patch] fix the triplet regexp to recognize triplets, not only quadruplets

[Pedro Alves]

On 03/23/2015 12:27 PM, Matthias Klose wrote:
> This allows triplets where the vendor is not set. Should go to the trunk and the
> 7.9 branch.
> 
> Matthias
> 
> 	* compile/compile.c (compile_to_object): Allow triplets.
> 
> --- a/gdb/compile/compile.c
> +++ b/gdb/compile/compile.c
> @@ -483,7 +483,7 @@ compile_to_object (struct command_line *
> 
>    os_rx = osabi_triplet_regexp (gdbarch_osabi (gdbarch));
>    arch_rx = gdbarch_gnu_triplet_regexp (gdbarch);
> -  triplet_rx = concat (arch_rx, "-[^-]*-", os_rx, (char *) NULL);
> +  triplet_rx = concat (arch_rx, "(-[^-]*)?-", os_rx, (char *) NULL);

Add comment like:

/* Allow triplets with or without vendor set.  */

OK with that change.

>    make_cleanup (xfree, triplet_rx);
> 
>    /* Set compiler command-line arguments.  */

Thanks,
Pedro Alves