toupper.3: Add LIBRARY section (libc)

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>

diff --git a/man3/toupper.3 b/man3/toupper.3
index 254262e169ef14d0eea4cc16ee2754e5a78d398e..3231c612f9966b631f59b51cd90cce94c3a1ed35 100644 (file)
--- a/man3/toupper.3
+++ b/man3/toupper.3
@@ -8,6 +8,9 @@
 .TH TOUPPER 3  2021-03-22 "GNU" "Linux Programmer's Manual"
 .SH NAME
 toupper, tolower, toupper_l, tolower_l \- convert uppercase or lowercase
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " -lc )
 .SH SYNOPSIS
 .nf
 .B #include <ctype.h>