From 6c109081ba11c1ef4b33ed922cbd447b6fe96b29 Mon Sep 17 00:00:00 2001
From: uvok
Date: Fri, 2 Jan 2026 12:21:06 +0100
Subject: Fix verilator multi-module warning

---
 nandgame/alu.sv        | 5 +++++
 nandgame/arith_unit.sv | 5 +++++
 nandgame/cond_check.sv | 5 +++++
 nandgame/logic_unit.sv | 5 +++++
 4 files changed, 20 insertions(+)

diff --git a/nandgame/alu.sv b/nandgame/alu.sv
index 0e273f9..6aef925 100644
--- a/nandgame/alu.sv
+++ b/nandgame/alu.sv
@@ -6,6 +6,9 @@
 `include "arith_unit.sv"
 `include "logic_unit.sv"
 
+`ifndef NANDGAME_ALU
+`define NANDGAME_ALU
+
 module  alu #(
   parameter DATA_WIDTH = 16
 ) (
@@ -46,3 +49,5 @@ assign RES = u ? MyResA : MyResL;
 
 
 endmodule
+
+`endif
diff --git a/nandgame/arith_unit.sv b/nandgame/arith_unit.sv
index b85d6d6..e0254aa 100644
--- a/nandgame/arith_unit.sv
+++ b/nandgame/arith_unit.sv
@@ -4,6 +4,9 @@
 
 `include "nandgame_types.v"
 
+`ifndef NANDGAME_ARU
+`define NANDGAME_ARU
+
 module  arith_unit #(
   parameter DATA_WIDTH = 16
 ) (
@@ -25,3 +28,5 @@ always_comb begin
 end
 
 endmodule
+
+`endif
diff --git a/nandgame/cond_check.sv b/nandgame/cond_check.sv
index dc9d334..d5344ba 100644
--- a/nandgame/cond_check.sv
+++ b/nandgame/cond_check.sv
@@ -2,6 +2,9 @@
 
 `timescale 1us/1us
 
+`ifndef NANDGAME_CONDC
+`define NANDGAME_CONDC
+
 module  cond_check #(
   parameter DATA_WIDTH = 16
 ) (
@@ -21,3 +24,5 @@ assign eqr = eqz && (X == 0);
 assign res = ltr || gtr || eqr;
 
 endmodule
+
+`endif
diff --git a/nandgame/logic_unit.sv b/nandgame/logic_unit.sv
index 93cb399..89fe8fb 100644
--- a/nandgame/logic_unit.sv
+++ b/nandgame/logic_unit.sv
@@ -4,6 +4,9 @@
 
 `include "nandgame_types.v"
 
+`ifndef NANDGAME_NANDGAME_LOU
+`define NANDGAME_NANDGAME_LOU
+
 module logic_unit #(
   parameter DATA_WIDTH = 16
 ) (
@@ -33,3 +36,5 @@ always_comb begin
 end
 
 endmodule
+
+`endif
-- 
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