--- gnutrition/configure.ac	2026/05/17 20:30:05	1.3
+++ gnutrition/configure.ac	2026/05/18 19:36:06	1.4
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 #
-# $Id: configure.ac,v 1.3 2026/05/17 20:30:05 asm Exp $
+# $Id: configure.ac,v 1.4 2026/05/18 19:36:06 asm Exp $
 #
 # configure.ac for GNUtrition
 #
@@ -46,6 +46,10 @@ AC_CHECK_PROGS([TEXIHTML], [texi2html],
 AC_CHECK_PROGS([TEXIPDF], [texi2pdf], [no])
 AM_CONDITIONAL([HAVE_TEXINFO], [test "$MAKEINFO" != "no" && test "$TEXIHTML" != "no" && test "$TEXIPDF" != "no"])
 
+# Optional: check if local manual copies should get install
+AM_CONDITIONAL([INSTALL_HTML], [test -f "$srcdir/gnutrition.html"])
+AM_CONDITIONAL([INSTALL_PDF],  [test -f "$srcdir/gnutrition.pdf"])
+
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_HEADERS([config.h])
 AC_OUTPUT