Bazel build rules for Verilator
Overview
Add the following to your WORKSPACE file
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
# Verilator
http_archive(
name = "rules_verilator",
# See release page for latest urls + sha
)
load(
"@rules_verilator//verilator:repositories.bzl",
"rules_verilator_dependencies",
"rules_verilator_toolchains"
)
rules_verilator_dependencies()
rules_verilator_toolchains()
# Register toolchain dependencies
load("@rules_m4//m4:m4.bzl", "m4_register_toolchains")
m4_register_toolchains()
load("@rules_flex//flex:flex.bzl", "flex_register_toolchains")
flex_register_toolchains()
load("@rules_bison//bison:bison.bzl", "bison_register_toolchains")
bison_register_toolchains()Supported Bazel Versions
These rules are under active development and the minimum supported Bazel version may change.
Currently, the master branch requires Bazel >= 5.2.0.
Build rules
load("@rules_verilator//verilator:defs.bzl", "verilator_cc_library")
verilator_cc_library(
name = "alu",
mtop = "alu", # defaults to name if not specified
srcs = ["alu.sv"],
)
cc_binary(
name = "alu_bin",
srcs = ["alu.cpp"],
deps = [":alu"],
)The details of a verilog module (sources, top name, etc.) can also be specified by a verilog_module
which can be reused in other rules.
load("@rules_verilog//verilog:defs.bzl", "verilog_module")
load("@rules_verilator//verilator:defs.bzl", "verilator_cc_library")
verilog_module(
name = "alu_module",
top = "alu",
srcs = ["alu.sv"],
)
verilator_cc_library(
name = "alu",
module = ":alu_module",
)See test/alu/BUILD for working examples.
License
Released under Apache 2.0.