Create makefile.yml (#1)

Add Github actions to repo

.github/workflows/makefile.yml

@@ -0,0 +1,18 @@
+name: Makefile CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Docker test
+      run: docker run -v ${PWD}:/work --user $(id -u):$(id -g) -e CCACHE_DIR=/work/.ccache --entrypoint make verilator/verilator:stable

.gitignore

@@ -1,2 +1,3 @@
 examples/**/obj_dir
 examples/**/*.txt
+examples/**/*.vcd

verilator.mk

@@ -1,10 +1,9 @@
 
 VERILATOR_EXE := obj_dir/V$(PROJECT_NAME)
-VERILATOR_ARGS += --cc --build --exe --trace
 
-CPP_FLAGS += -I $(VERILATOR_ROOT)/obj_dir
 PARSER ?= $(VERILATOR_ROOT)/default_parser.sh
 
+VERILATOR_ARGS += --cc --build --exe --trace
 
 all: run
 
@@ -15,7 +14,7 @@ $(VERILATOR_EXE): lint | $(SOURCES)
 	verilator $(VERILATOR_ARGS) $(SIMFILES) $(SOURCES) > /dev/null
 
 run: $(VERILATOR_EXE)
-	-@set -o pipefail; ./$(VERILATOR_EXE) | tee output.txt; ./$(PARSER) $(PROJECT_NAME) $$? output.txt
+	./$(VERILATOR_EXE) | tee output.txt; ./$(PARSER) $(PROJECT_NAME) $$? output.txt
 
 clean:
 	rm -rf obj_dir