isalpha.3: Explain why POSIX.1-2008 marks isascii(3) obsolete

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/isalpha.3 b/man3/isalpha.3
index b0f46daaa3dc6e2d6a8f4dfe5f6e6dba5f75387b..4adb9f5aeb8ce5a11354e2bf6dc31a62176724e9 100644 (file)
--- a/man3/isalpha.3
+++ b/man3/isalpha.3
@@ -26,7 +26,7 @@
 .\" Modified Sat Sep  2 21:52:01 1995 by Jim Van Zandt <jrv@vanzandt.mv.com>
 .\" Modified Mon May 27 22:55:26 1996 by Martin Schulze (joey@linux.de)
 .\"
-.TH ISALPHA 3  2009-02-04 "GNU" "Linux Programmer's Manual"
+.TH ISALPHA 3 2009-03-15 "GNU" "Linux Programmer's Manual"
 .SH NAME
 isalnum, isalpha, isascii, isblank, iscntrl, isdigit, isgraph, islower,
 isprint, ispunct, isspace, isupper, isxdigit \- character
@@ -167,7 +167,8 @@ and is also an SVr4 extension.
 conforms to POSIX.1-2001 and C99 7.4.1.3.
 POSIX.1-2008 marks
 .BR isascii ()
-as obsolete.
+as obsolete,
+noting that it cannot be used portably in a localized application.
 .SH NOTES
 The details of what characters belong into which class depend on the current
 locale.