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-rw-r--r--doc/posix-functions/wcswidth.texi3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/posix-functions/wcswidth.texi b/doc/posix-functions/wcswidth.texi
index eab3393a60..02049ffdd0 100644
--- a/doc/posix-functions/wcswidth.texi
+++ b/doc/posix-functions/wcswidth.texi
@@ -18,4 +18,7 @@ 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.
+However, the Gnulib function @code{c32swidth}, provided by Gnulib module
+@code{c32swidth}, operates on 32-bit wide characters and therefore does not
+have this limitation.
@end itemize