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-rw-r--r--doc/posix-functions/vfwprintf.texi4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/posix-functions/vfwprintf.texi b/doc/posix-functions/vfwprintf.texi
index 22e4a59212..0712269aa4 100644
--- a/doc/posix-functions/vfwprintf.texi
+++ b/doc/posix-functions/vfwprintf.texi
@@ -34,6 +34,10 @@ The @code{%m} directive is not portable, use @code{%s} mapped to an
argument of @code{strerror(errno)} (or a version of @code{strerror_r})
instead.
@item
+In the C or POSIX locales, the @code{%c} and @code{%s} conversions may fail
+on some platforms:
+glibc 2.35.
+@item
When formatting an integer with grouping flag, this function inserts thousands
separators even in the "C" locale on some platforms:
NetBSD 5.1.