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-rw-r--r--ChangeLog6
-rw-r--r--doc/posix-functions/towlower.texi5
-rw-r--r--doc/posix-functions/towupper.texi5
3 files changed, 16 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 9940eb2a49..d13727e2eb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
2023-04-09 Bruno Haible <bruno@clisp.org>
+ doc: Mention a NetBSD bug.
+ * doc/posix-functions/towlower.texi: Mention NetBSD bug 57339.
+ * doc/posix-functions/towupper.texi: Likewise.
+
+2023-04-09 Bruno Haible <bruno@clisp.org>
+
vasnwprintf-posix: More details about the glibc bug.
* doc/posix-functions/swprintf.texi: Add comment.
* m4/printf.m4 (gl_SWPRINTF_DIRECTIVE_LA): Update cross-compilation
diff --git a/doc/posix-functions/towlower.texi b/doc/posix-functions/towlower.texi
index a53c96f438..a8ef3ce990 100644
--- a/doc/posix-functions/towlower.texi
+++ b/doc/posix-functions/towlower.texi
@@ -23,4 +23,9 @@ Portability problems not fixed by Gnulib:
@item
On Windows and 32-bit AIX platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
+@item
+This function returns wrong values even for the ASCII characters
+in a zh_CN.GB18030 locale on some platforms:
+@c https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=57339
+NetBSD 9.0.
@end itemize
diff --git a/doc/posix-functions/towupper.texi b/doc/posix-functions/towupper.texi
index 823ff29743..902cf16e68 100644
--- a/doc/posix-functions/towupper.texi
+++ b/doc/posix-functions/towupper.texi
@@ -23,4 +23,9 @@ Portability problems not fixed by Gnulib:
@item
On Windows and 32-bit AIX platforms, @code{wchar_t} is a 16-bit type and therefore cannot
accommodate all Unicode characters.
+@item
+This function returns wrong values even for the ASCII characters
+in a zh_CN.GB18030 locale on some platforms:
+@c https://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=57339
+NetBSD 9.0.
@end itemize