--- cvsroot/CV/Makefile.PL	2013/10/21 08:48:59	1.51
+++ cvsroot/CV/Makefile.PL	2021/04/10 03:32:10	1.56
@@ -11,6 +11,10 @@
 ** apt-get install libmagic-dev libjpeg62-dev libglib-perl libgtk2-perl
 ** apt-get install libgtk2.0-dev
 **
+** Optional dependencies:
+** apt-get install libwebp-dev
+** jpeg-xl reference implementation
+**
 
 EOF
 
@@ -19,8 +23,26 @@
 
 my $pkg = new ExtUtils::Depends ("Gtk2::CV");
 
-$pkg->set_libs ("-ljpeg -lmagic");
+my $lib = "-ljpeg -lmagic";
+my $inc = "";
+
+if (!system "pkg-config --exists libwebp libwebpdemux") {
+   $inc .= " -DWEBP=1";
+   $inc .= " " . qx<pkg-config --cflags libwebp libwebpdemux>;
+   $lib .= " " . qx<pkg-config --libs   libwebp libwebpdemux>;
+}
+
+if (0) {
+if (!system "pkg-config --exists libjxl libjxl_threads") {
+   $inc .= " -DJXL=1";
+   $inc .= " " . qx<pkg-config --cflags libjxl libjxl_threads>;
+   $lib .= " " . qx<pkg-config --libs   libjxl libjxl_threads>;
+}
+}
+
 $pkg->add_deps ("Gtk2", "Glib");
+$pkg->set_libs ($lib);
+$pkg->set_inc  ($inc);
 
 sub MY::postamble {
    my $self=shift;
@@ -68,6 +90,7 @@
        'lib/Gtk2/CV/Plugin/NameCluster.pm'	=> '$(INST_LIB)/Gtk2/CV/Plugin/NameCluster.pm',
        'lib/Gtk2/CV/Plugin/PatRenamer.pm'	=> '$(INST_LIB)/Gtk2/CV/Plugin/PatRenamer.pm',
        'lib/Gtk2/CV/Plugin/RCluster.pm'		=> '$(INST_LIB)/Gtk2/CV/Plugin/RCluster.pm',
+       'lib/Gtk2/CV/Plugin/MetaCluster.pm'	=> '$(INST_LIB)/Gtk2/CV/Plugin/MetaCluster.pm',
        'lib/Gtk2/CV/Progress.pm'		=> '$(INST_LIB)/Gtk2/CV/Progress.pm',
        'lib/Gtk2/CV.pm'				=> '$(INST_LIB)/Gtk2/CV.pm',