errno.3: Explicitly note that error numbers vary also across UNIX systems

Reported-by: Walter Harms <wharms@bfs.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/errno.3 b/man3/errno.3
index 1aef403a616c0b0fefc327ddfb54b826b2c741b5..1fa2767fb52ec6a2a47f8c54b8f777be36f89687 100644 (file)
--- a/man3/errno.3
+++ b/man3/errno.3
@@ -96,8 +96,9 @@ and
 .BR EWOULDBLOCK ,
 which may be the same.
 .PP
-On Linux, the error numbers that correspond to each symbolic name
-vary somewhat across architectures.
+The error numbers that correspond to each symbolic name
+vary across UNIX systems,
+and even across different architectures on Linux.
 Therefore, numeric values are not included in the list of
 error names below.
 On any particular system,