man/man3: add cross references to stdbit(3)

Add cross references to relevant stdbit man pages

Approved by:	markj (mentor)
MFC after:	1 month
Differential Revision: https://reviews.freebsd.org/D53661

3 files changed, 12 insertions, 2 deletions

diff --git a/lib/libc/string/ffs.3 b/lib/libc/string/ffs.3
index 1cca54c0b30b..14a64126e692 100644
--- a/lib/libc/string/ffs.3
+++ b/lib/libc/string/ffs.3
@@ -79,6 +79,8 @@ A return value of zero from any of these functions means that the
 argument was zero.
 .Sh SEE ALSO
 .Xr bitstring 3 ,
+.Xr stdc_first_trailing_one 3 ,
+.Xr stdc_trailing_zeros 3 ,
 .Xr bitset 9
 .Sh STANDARDS
 The
diff --git a/share/man/man3/bitstring.3 b/share/man/man3/bitstring.3
index 07558bd41ec3..87ba9a24a1b5 100644
--- a/share/man/man3/bitstring.3
+++ b/share/man/man3/bitstring.3
@@ -461,6 +461,7 @@ make_lpr_available()
 .Ed
 .Sh SEE ALSO
 .Xr malloc 3 ,
+.Xr stdbit 3 ,
 .Xr bitset 9
 .Sh HISTORY
 The
diff --git a/share/man/man3/intro.3 b/share/man/man3/intro.3
index 0cecdcab4069..952183d7dd2d 100644
--- a/share/man/man3/intro.3
+++ b/share/man/man3/intro.3
@@ -24,7 +24,7 @@
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
-.Dd November 27, 2024
+.Dd November 10, 2025
 .Dt INTRO 3
 .Os
 .Sh NAME
@@ -72,13 +72,20 @@ see
 .It database routines
 see
 .Xr db 3
-.It bit operators
+.It bit string operators
 see
 .Xr bitstring 3
+.It bit and byte utilities
+see
+.Xr stdbit 3
 .It string operators
 see
 .Xr string 3
+and
+.Xr bstring 3
 .It character tests and character operators
+see
+.Xr ctype 3
 .It storage allocation
 see
 .Xr mpool 3