From b79c572a22b61b1bdf21204fd993096585e2a46c Mon Sep 17 00:00:00 2001
From: Brendan Haines <brendan.haines@gmail.com>
Date: Fri, 2 Jul 2021 04:58:58 -0600
Subject: [PATCH] tweak makefile

---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 8e3abdb..53a7ea6 100644
--- a/Makefile
+++ b/Makefile
@@ -40,9 +40,10 @@ $(BUILD_DIR)/%.elf: test/%.ld $(BUILD_DIR)/%.o | $(BUILD_DIR)
 %.hex: %.elf
 	riscv64-linux-gnu-objcopy --target=verilog $< $@
 
-sim: $(BUILD_DIR)/tb.out $(BUILD_DIR)/test.hex
+$(BUILD_DIR)/core_tb.vcd: $(BUILD_DIR)/tb.out $(BUILD_DIR)/test.hex
 	cd $(BUILD_DIR) && ./tb.out
 
+sim: $(BUILD_DIR)/core_tb.vcd
 
 ## General
 $(BUILD_DIR):