[RFC] Make _FILE_OFFSET_BITS=64 default.

[Rich Felker]

On Thu, Mar 13, 2014 at 05:16:08AM -0400, Mike Frysinger wrote:
> diff --git a/io/Makefile b/io/Makefile
> index 8a6562e..77a1907 100644
> --- a/io/Makefile
> +++ b/io/Makefile
> @@ -99,7 +99,7 @@ CFLAGS-fallocate.c = -fexceptions
>  CFLAGS-fallocate64.c = -fexceptions
>  CFLAGS-sync_file_range.c = -fexceptions
>  
> -CFLAGS-test-stat.c = -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
> +CFLAGS-test-stat.c = -U_FILE_OFFSET_BITS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE

If this happens to work, it's purely by chance/redundancy. -U
overrides all -D for the same identifier, even subsequent ones.

Rich