Don't worry if there is no distro-configs/Foo.conf

The --with-distro options might come from bin/build-ooo in a "build"
style build, and in that case, the relevant configure options are
already on the command line, too.

autogen.sh

@@ -44,8 +44,8 @@ sub read_args($)
 sub invalid_distro($$)
 {
     my ($config, $distro) = @_;
-    print STDERR "can't find distro option set: $config\n";
-    print STDERR "valid values are:\n";
+    print STDERR "Can't find distro option set: $config\nThis is not necessarily a problem.\n";
+    print STDERR "Distros with distro option sets are:\n";
     my $dirh;
     opendir ($dirh, "distro-configs");
     while (($_ = readdir ($dirh))) {
@@ -53,7 +53,6 @@ sub invalid_distro($$)
     print STDERR "\t$1\n";
     }
     closedir ($dirh);
-    exit (1);
 }
 
 my @cmdline_args = ();
@@ -72,8 +71,9 @@ for my $arg (@cmdline_args) {
     my $config = "distro-configs/$1.conf";
     if (! -f $config) {
         invalid_distro ($config, $1);
-    }
-    push @args, read_args ($config);
+        } else {
+            push @args, read_args ($config);
+        }
     } else {
     push @args, $arg;
     }