svn commit: r303033 - head/share/man/man7

[Conrad Meyer]

On Tue, Jul 19, 2016 at 10:46 AM, Ed Maste <emaste at freebsd.org> wrote:
> Author: emaste
> Date: Tue Jul 19 17:46:09 2016
> New Revision: 303033
> URL: https://svnweb.freebsd.org/changeset/base/303033
>
> Log:
>   add an arch.7 man page with architecture-specific details
>
>   Based on details collected on the wiki, at
>   https://wiki.freebsd.org/EdMaste/ArchitectureSpecifics
>   Further details to be added over time.
>
>   Sponsored by: The FreeBSD Foundation
>   Differential Revision:        https://reviews.freebsd.org/D7096
>
> Added:
>   head/share/man/man7/arch.7   (contents, props changed)
> Modified:
>   head/share/man/man7/Makefile
>
> ...
> Added: head/share/man/man7/arch.7
> ==============================================================================
> --- /dev/null   00:00:00 1970   (empty, because file is newly added)
> +++ head/share/man/man7/arch.7  Tue Jul 19 17:46:09 2016        (r303033)
> @@ -0,0 +1,171 @@
> ...
> +.Ss Predefined Macros
> +The compiler provides a number of predefined macros.
> +Some of these provide architecture-specific details and are explained below.
> +Other macros, including those required by the language standard, are not
> +included here.
> +.Pp
> +The full set of predefined macros can be obtained with this command:
> +.Bd -literal -offset indent
> +cc -x c -Dm -E /dev/null
> +.Ed
> +.Pp
> +Common type size and endianness macros:
> +.Bl -column -offset indent "BYTE_ORDER" ".Sy Meaning"
> +.It Sy Macro Ta Sy Meaning
> +.It Dv __LP64__ Ta 64-bit (8-byte) long and pointer, 32-bit (4-byte) int
> +.It Dv __ILP32__ Ta 32-bit (4-byte) int, long and pointer

ILP32 was only added on CURRENT during the 11 timeframe (the r276479
3.5.0 import), and can't be relied upon for stable/10 or 9, FWIW.
(Not useful for ports, for example.)

Sure, it's probably okay that this manual page only describes the
release it is present in.

Best,
Conrad