import native symbols in lib.h

lib.h gets included into the host module and the wasm module. For the
host module the attributes will be ignored.

scripts/Util.pm

@@ -198,10 +198,10 @@ sub read_experiment_info {
     open( my $fhandle, '<', "$local_archive_dir/$exp/0.info" )
       or die "Failed to open 0.info: $!";
     my $info = <$fhandle>;
-    chomp $info;
+    chomp $info if defined $info;
     close($fhandle);
 
-    return $info;
+    return defined $info ? $info : "";
 }
 
 sub read_marker_info {
@@ -251,7 +251,9 @@ sub select_experiment {
         my $info = read_experiment_info($exp);
 
         push @exp_with_notes,
-          defined $info ? sprintf( "%-50s (Note: %s)", $exp, $info ) : $exp;
+          ( defined $info && length($info) > 0 )
+          ? sprintf( "%-50s (Note: %s)", $exp, $info )
+          : $exp;
     }
 
     my @selected_experiments =

scripts/menu.pl

@@ -433,11 +433,8 @@ my %handlers = (
     '98. Delete Archived Experiments' => sub {
 
         # Delete archived experiments
-        my @experiments = Util::find_subdirs($local_archive_dir);
-        my @selected_experiments =
-          TUI::select_from_list( "Select Archived Experiments to Delete",
-            1, @experiments );
-        die "No experiment selected" unless @selected_experiments;
+        my @selected_experiments = Util::select_experiment(1);
+
         system( 'rm', '-rf', "$local_archive_dir/$_" )
           for @selected_experiments;
     },

scripts/wasm.just

@@ -15,7 +15,6 @@ WASI_CFLAGS := "\
 -Wl,--initial-memory=65536 \
 -Wl,--export=__heap_base \
 -Wl,--export=__data_end \
--Wl,--allow-undefined \
 "
 CROSS_CFLAGS_NOWASM := "\
 -O0 \