[src/trunk]: src/lib/libc Clarify the explanation of the compat_time.c defini...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a4a1bc874714
branches:  trunk
changeset: 350453:a4a1bc874714
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Thu Jan 12 00:38:25 2017 +0000

description:
Clarify the explanation of the compat_time.c definition of time.

diffstat:

 lib/libc/README |  11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diffs (30 lines):

diff -r 8a75a9720695 -r a4a1bc874714 lib/libc/README
--- a/lib/libc/README   Thu Jan 12 00:38:01 2017 +0000
+++ b/lib/libc/README   Thu Jan 12 00:38:25 2017 +0000
@@ -1,4 +1,4 @@
-       $NetBSD: README,v 1.5 2015/07/11 15:23:57 riastradh Exp $
+       $NetBSD: README,v 1.6 2017/01/12 00:38:25 riastradh Exp $
 
 libc: The C library.
 
@@ -217,14 +217,17 @@
 
    Then compat_time.c defines `time' normally:
 
-       time_t
-       time(time_t *t)
+       int32_t
+       time(int32_t *t)
        {
        ...
 
    Again, macro expansion replaces `time' by `_time', but since there
    is no __RENAME directive in <compat/include/time.h>, the resulting
-   ELF global symbol is `_time'.
+   ELF global symbol is `_time'.  (Actually, compat_time.c just has
+   `#define time_t int32_t' and `#include "gen/time.c"' to get the same
+   text of the definition of time.  The above definition is what we get
+   effectively by substituting int32_t for the type time_t.)
 
    Finally, alongside the definition in compat_time.c is