time_t.3type: reference _TIME_BITS (time64)

Just like we do with _FILE_OFFSET_BITS in off_t.3type.

Reference: https://wiki.gentoo.org/wiki/Project:Toolchain/time64_migration
Reference: https://sourceware.org/pipermail/libc-alpha/2022-January/134985.html
Signed-off-by: Sam James <sam@gentoo.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/man3type/time_t.3type b/man3type/time_t.3type
index d40dd0c0d3da3c70915a1166a426896196e4f043..9690260e520c6a25aa44c9539be13a9adde805e0 100644 (file)
--- a/man3type/time_t.3type
+++ b/man3type/time_t.3type
@@ -70,6 +70,11 @@ POSIX.1-2001 and later.
 POSIX.1-2001 and later.
 .PD
 .SH NOTES
+On some architectures,
+the width of
+.I time_t
+can be controlled with the feature test macro
+.BR _TIME_BITS .
 .TP
 .I time_t
 The following headers also provide