sysconf.3: Clearly note that _SC_PAGESIZE and _SC_PAGE_SIZE are synonyms

Reported-by: Hugues Evrard <hevrard@google.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/sysconf.3 b/man3/sysconf.3
index 53a968b757cdf40187b732d76c96e6255807c557..8af5afc474f91efc5e62e8b0ca3ad2709a8e39c4 100644 (file)
--- a/man3/sysconf.3
+++ b/man3/sysconf.3
@@ -175,7 +175,15 @@ Must not be less than
 .BR PAGESIZE " - " _SC_PAGESIZE
 Size of a page in bytes.
 Must not be less than 1.
-(Some systems use PAGE_SIZE instead.)
+.TP
+.BR PAGE_SIZE " - " _SC_PAGE_SIZE
+A synonym for
+.BR PAGESIZE / _SC_PAGESIZE .
+(Both
+.BR PAGESIZE
+and
+.BR PAGE_SIZE
+are specified in POSIX.)
 .TP
 .BR RE_DUP_MAX " - " _SC_RE_DUP_MAX
 The number of repeated occurrences of a BRE permitted by