--- gnutrition/configure.ac	2026/05/08 03:23:57	1.1
+++ gnutrition/configure.ac	2026/05/17 20:09:43	1.2
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
-# $Id: configure.ac,v 1.1 2026/05/08 03:23:57 asm Exp $
+# $Id: configure.ac,v 1.2 2026/05/17 20:09:43 asm Exp $
 #
 # configure.ac for GNUtrition
 #
@@ -38,9 +38,13 @@ PKG_CHECK_MODULES([GTK], [gtk+-3.0], [ha
 
 # Optional: GIO 2 for D-Bus support in the GUI binary.
 PKG_CHECK_MODULES([GIO], [gio-2.0], [have_gio=yes], [have_gio=no])
-
 AM_CONDITIONAL([BUILD_GTK], [test "x$have_gtk" = xyes -a "x$have_gio" = xyes])
 
+# Optional: TexInfo tools.
+AC_CHECK_PROGS([TEXI2HTML], [texi2html], [have_texi2html=yes], [have_texi2html=no])
+AC_CHECK_PROGS([TEXI2PDF], [texi2pdf], [have_texi2pdf=yes], [have_texi2pdf=no])
+AM_CONDITIONAL([HAVE_TEXINFO], [test "x$have_texi2html" != "no" && test "x$texi2pdf" != "no"])
+
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_HEADERS([config.h])
 AC_OUTPUT