Add bazel support

2026-04-30 19:09:10 +08:00 · 2026-04-26 15:17:58 +02:00 · 2026-04-26 15:17:58 +02:00 · cace94a747
commit cace94a747
parent d1fe2938e1
15 changed files with 656 additions and 0 deletions
--- a/.bazelrc
+++ b/.bazelrc
@ -0,0 +1,26 @@
+# Bazel settings for ETL
+build --enable_bzlmod
+build --cxxopt=-std=c++17
+
+# Cross-compilation: build flags + QEMU (mirrors .devcontainer/run-tests.sh)
+# Each config sets CC + tool env vars so Bazel's auto-configured toolchain
+# finds the full cross-tool suite, and --run_under for QEMU execution.
+build:armhf    --repo_env=CC=arm-linux-gnueabihf-gcc --repo_env=AR=arm-linux-gnueabihf-ar --repo_env=LD=arm-linux-gnueabihf-ld --repo_env=NM=arm-linux-gnueabihf-nm --repo_env=STRIP=arm-linux-gnueabihf-strip --repo_env=OBJDUMP=arm-linux-gnueabihf-objdump
+build:armhf    --cxxopt=-std=c++23 --copt=-DETL_NO_STL --copt=-O0
+test:armhf     --run_under=/usr/bin/qemu-arm-static
+
+build:i386     --repo_env=CC=i686-linux-gnu-gcc --repo_env=AR=i686-linux-gnu-ar --repo_env=LD=i686-linux-gnu-ld --repo_env=NM=i686-linux-gnu-nm --repo_env=STRIP=i686-linux-gnu-strip --repo_env=OBJDUMP=i686-linux-gnu-objdump
+build:i386     --cxxopt=-std=c++23 --copt=-DETL_NO_STL --copt=-O0
+test:i386      --run_under=/usr/bin/qemu-i386-static
+
+build:powerpc  --repo_env=CC=powerpc-linux-gnu-gcc --repo_env=AR=powerpc-linux-gnu-ar --repo_env=LD=powerpc-linux-gnu-ld --repo_env=NM=powerpc-linux-gnu-nm --repo_env=STRIP=powerpc-linux-gnu-strip --repo_env=OBJDUMP=powerpc-linux-gnu-objdump
+build:powerpc  --cxxopt=-std=c++23 --copt=-DETL_NO_STL --copt=-O0
+test:powerpc   --run_under=/usr/bin/qemu-ppc
+
+build:riscv64  --repo_env=CC=riscv64-linux-gnu-gcc --repo_env=AR=riscv64-linux-gnu-ar --repo_env=LD=riscv64-linux-gnu-ld --repo_env=NM=riscv64-linux-gnu-nm --repo_env=STRIP=riscv64-linux-gnu-strip --repo_env=OBJDUMP=riscv64-linux-gnu-objdump
+build:riscv64  --cxxopt=-std=c++23 --copt=-DETL_NO_STL --copt=-O0
+test:riscv64   --run_under=/usr/bin/qemu-riscv64-static
+
+build:s390x    --repo_env=CC=s390x-linux-gnu-gcc --repo_env=AR=s390x-linux-gnu-ar --repo_env=LD=s390x-linux-gnu-ld --repo_env=NM=s390x-linux-gnu-nm --repo_env=STRIP=s390x-linux-gnu-strip --repo_env=OBJDUMP=s390x-linux-gnu-objdump
+build:s390x    --cxxopt=-std=c++23 --copt=-DETL_NO_STL --copt=-O0
+test:s390x     --run_under=/usr/bin/qemu-s390x-static
--- a/.bazelversion
+++ b/.bazelversion
@ -0,0 +1 @@
+8.5.1
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@ -58,6 +58,11 @@ RUN set -eux; \
    && install -m 755 treefmt /usr/bin/treefmt \
    && rm treefmt.tar.gz treefmt

+# Install Bazelisk as 'bazel'
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    wget -qO /usr/local/bin/bazel https://github.com/bazelbuild/bazelisk/releases/latest/download/bazelisk-linux-${ARCH} && \
+    chmod +x /usr/local/bin/bazel
+
 RUN set -eux \
    && echo "Pip version: " \
    && pip --version \
--- a/.devcontainer/armhf/Dockerfile
+++ b/.devcontainer/armhf/Dockerfile
@ -18,9 +18,11 @@ RUN dpkg --add-architecture armhf && \
    ninja-build \
    git \
    wget \
+    ca-certificates \
    file \
    libc6:armhf \
    libstdc++6:armhf \
+    libatomic1:armhf \
    && rm -rf /var/lib/apt/lists/*

 # Create non-root user with stable UID/GID
@ -34,6 +36,11 @@ RUN groupadd --gid ${USER_GID} ${USERNAME} && \
 # Set working directory
 WORKDIR /workspaces/etl

+# Install Bazelisk as 'bazel'
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    wget -qO /usr/local/bin/bazel https://github.com/bazelbuild/bazelisk/releases/latest/download/bazelisk-linux-${ARCH} && \
+    chmod +x /usr/local/bin/bazel
+
 # Verify QEMU and cross-compilation setup
 RUN echo "=== Host Architecture ===" && \
    uname -m && \
--- a/.devcontainer/i386/Dockerfile
+++ b/.devcontainer/i386/Dockerfile
@ -18,9 +18,11 @@ RUN dpkg --add-architecture i386 && \
    ninja-build \
    git \
    wget \
+    ca-certificates \
    file \
    libc6:i386 \
    libstdc++6:i386 \
+    libatomic1:i386 \
    && rm -rf /var/lib/apt/lists/*

 # Create non-root user with stable UID/GID
@ -34,6 +36,11 @@ RUN groupadd --gid ${USER_GID} ${USERNAME} && \
 # Set working directory
 WORKDIR /workspaces/etl

+# Install Bazelisk as 'bazel'
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    wget -qO /usr/local/bin/bazel https://github.com/bazelbuild/bazelisk/releases/latest/download/bazelisk-linux-${ARCH} && \
+    chmod +x /usr/local/bin/bazel
+
 # Verify QEMU and cross-compilation setup
 RUN echo "=== Host Architecture ===" && \
    uname -m && \
--- a/.devcontainer/powerpc/Dockerfile
+++ b/.devcontainer/powerpc/Dockerfile
@ -46,6 +46,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
    g++-powerpc-linux-gnu \
    libc6:powerpc \
    libstdc++6:powerpc \
+    libatomic1:powerpc \
    && rm -rf /var/lib/apt/lists/*

 # Create non-root user with stable UID/GID
@ -59,6 +60,11 @@ RUN groupadd --gid ${USER_GID} ${USERNAME} && \
 # Set working directory
 WORKDIR /workspaces/etl

+# Install Bazelisk as 'bazel'
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    wget -qO /usr/local/bin/bazel https://github.com/bazelbuild/bazelisk/releases/latest/download/bazelisk-linux-${ARCH} && \
+    chmod +x /usr/local/bin/bazel
+
 # Verify QEMU and cross-compilation setup
 RUN echo "=== Host Architecture ===" && \
    uname -m && \
--- a/.devcontainer/riscv64/Dockerfile
+++ b/.devcontainer/riscv64/Dockerfile
@ -18,9 +18,11 @@ RUN dpkg --add-architecture riscv64 && \
    ninja-build \
    git \
    wget \
+    ca-certificates \
    file \
    libc6:riscv64 \
    libstdc++6:riscv64 \
+    libatomic1:riscv64 \
    && rm -rf /var/lib/apt/lists/*

 # Create non-root user with stable UID/GID
@ -34,6 +36,11 @@ RUN groupadd --gid ${USER_GID} ${USERNAME} && \
 # Set working directory
 WORKDIR /workspaces/etl

+# Install Bazelisk as 'bazel'
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    wget -qO /usr/local/bin/bazel https://github.com/bazelbuild/bazelisk/releases/latest/download/bazelisk-linux-${ARCH} && \
+    chmod +x /usr/local/bin/bazel
+
 # Verify QEMU and cross-compilation setup
 RUN echo "=== Host Architecture ===" && \
    uname -m && \
--- a/.devcontainer/s390x/Dockerfile
+++ b/.devcontainer/s390x/Dockerfile
@ -18,9 +18,11 @@ RUN dpkg --add-architecture s390x && \
    ninja-build \
    git \
    wget \
+    ca-certificates \
    file \
    libc6:s390x \
    libstdc++6:s390x \
+    libatomic1:s390x \
    && rm -rf /var/lib/apt/lists/*

 # Create non-root user with stable UID/GID
@ -34,6 +36,11 @@ RUN groupadd --gid ${USER_GID} ${USERNAME} && \
 # Set working directory
 WORKDIR /workspaces/etl

+# Install Bazelisk as 'bazel'
+RUN ARCH=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/') && \
+    wget -qO /usr/local/bin/bazel https://github.com/bazelbuild/bazelisk/releases/latest/download/bazelisk-linux-${ARCH} && \
+    chmod +x /usr/local/bin/bazel
+
 # Verify QEMU and cross-compilation setup
 RUN echo "=== Host Architecture ===" && \
    uname -m && \
--- a/BUILD.bazel
+++ b/BUILD.bazel
@ -0,0 +1,9 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "etl",
+    hdrs = glob(["include/**/*.h"]),
+    includes = ["include"],
+)
--- a/MODULE.bazel
+++ b/MODULE.bazel
@ -0,0 +1,7 @@
+module(
+    name = "etl",
+    version = "0.0.0",
+)
+
+bazel_dep(name = "platforms", version = "0.0.11")
+bazel_dep(name = "rules_cc", version = "0.1.1")
--- a/MODULE.bazel.lock
+++ b/MODULE.bazel.lock
@ -0,0 +1,205 @@
+{
+  "lockFileVersion": 24,
+  "registryFileHashes": {
+    "https://bcr.bazel.build/bazel_registry.json": "8a28e4aff06ee60aed2a8c281907fb8bcbf3b753c91fb5a5c57da3215d5b3497",
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+  },
+  "selectedYankedVersions": {},
+  "moduleExtensions": {
+    "@@rules_kotlin+//src/main/starlark/core/repositories:bzlmod_setup.bzl%rules_kotlin_extensions": {
+      "general": {
+        "bzlTransitiveDigest": "rL/34P1aFDq2GqVC2zCFgQ8nTuOC6ziogocpvG50Qz8=",
+        "usagesDigest": "QI2z8ZUR+mqtbwsf2fLqYdJAkPOHdOV+tF2yVAUgRzw=",
+        "recordedFileInputs": {},
+        "recordedDirentsInputs": {},
+        "envVariables": {},
+        "generatedRepoSpecs": {
+          "com_github_jetbrains_kotlin_git": {
+            "repoRuleId": "@@rules_kotlin+//src/main/starlark/core/repositories:compiler.bzl%kotlin_compiler_git_repository",
+            "attributes": {
+              "urls": [
+                "https://github.com/JetBrains/kotlin/releases/download/v1.9.23/kotlin-compiler-1.9.23.zip"
+              ],
+              "sha256": "93137d3aab9afa9b27cb06a824c2324195c6b6f6179d8a8653f440f5bd58be88"
+            }
+          },
+          "com_github_jetbrains_kotlin": {
+            "repoRuleId": "@@rules_kotlin+//src/main/starlark/core/repositories:compiler.bzl%kotlin_capabilities_repository",
+            "attributes": {
+              "git_repository_name": "com_github_jetbrains_kotlin_git",
+              "compiler_version": "1.9.23"
+            }
+          },
+          "com_github_google_ksp": {
+            "repoRuleId": "@@rules_kotlin+//src/main/starlark/core/repositories:ksp.bzl%ksp_compiler_plugin_repository",
+            "attributes": {
+              "urls": [
+                "https://github.com/google/ksp/releases/download/1.9.23-1.0.20/artifacts.zip"
+              ],
+              "sha256": "ee0618755913ef7fd6511288a232e8fad24838b9af6ea73972a76e81053c8c2d",
+              "strip_version": "1.9.23-1.0.20"
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+          "com_github_pinterest_ktlint": {
+            "repoRuleId": "@@bazel_tools//tools/build_defs/repo:http.bzl%http_file",
+            "attributes": {
+              "sha256": "01b2e0ef893383a50dbeb13970fe7fa3be36ca3e83259e01649945b09d736985",
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+                "https://github.com/pinterest/ktlint/releases/download/1.3.0/ktlint"
+              ],
+              "executable": true
+            }
+          },
+          "rules_android": {
+            "repoRuleId": "@@bazel_tools//tools/build_defs/repo:http.bzl%http_archive",
+            "attributes": {
+              "sha256": "cd06d15dd8bb59926e4d65f9003bfc20f9da4b2519985c27e190cddc8b7a7806",
+              "strip_prefix": "rules_android-0.1.1",
+              "urls": [
+                "https://github.com/bazelbuild/rules_android/archive/v0.1.1.zip"
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+            "bazel_tools",
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+          ]
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+      }
+    }
+  },
+  "facts": {}
+}
--- a/docs/bazel.md
+++ b/docs/bazel.md
@ -0,0 +1,295 @@
+# Building ETL with Bazel
+
+ETL provides first-class [Bazel](https://bazel.build/) support, both for developing ETL itself and for consuming it as a dependency in your own projects.
+
+## Prerequisites
+
+- [Bazelisk](https://github.com/bazelbuild/bazelisk) (recommended) or [Bazel](https://bazel.build/install) 7.0 or later (with Bzlmod support)
+
+[Bazelisk](https://github.com/bazelbuild/bazelisk) is a launcher that automatically downloads and runs the Bazel version specified in the `.bazelversion` file at the project root. This ensures all contributors use a consistent Bazel version. Simply install Bazelisk and use `bazel` as usual — it transparently delegates to the correct version.
+
+## Syntax Checks
+
+To validate that every ETL header is well-formed and compiles on its own (equivalent to `test/run-syntax-checks.sh` for CMake):
+
+```sh
+bazel build //test/syntax_check:syntax_check
+```
+
+This compiles a set of minimal `.t.cpp` files, each of which includes a single ETL header, with strict warning flags enabled.
+
+## Cleaning Build Artifacts
+
+To remove all build outputs and symlinks (`bazel-bin`, `bazel-out`, `bazel-etl`, etc.):
+
+```sh
+bazel clean
+```
+
+For a full cleanup including the external dependency cache:
+
+```sh
+bazel clean --expunge
+```
+
+## Running Unit Tests
+
+To run the full test suite:
+
+```sh
+bazel test //test:etl_tests
+```
+
+You can also pass standard Bazel flags:
+
+```sh
+# Run with verbose test output
+bazel test //test:etl_tests --test_output=all
+
+# Run tests matching a filter (UnitTest++ subset)
+bazel test //test:etl_tests --test_arg=<suite_name>
+```
+
+## Using ETL in Your Project
+
+### With Bzlmod (recommended, Bazel 7+)
+
+Add ETL as a dependency in your project's `MODULE.bazel`:
+
+```python
+bazel_dep(name = "etl", version = "20.47.1")
+
+git_override(
+    module_name = "etl",
+    remote = "https://github.com/ETLCPP/etl.git",
+    tag = "20.47.1",  # or a specific commit
+)
+```
+
+Then depend on it in your `BUILD.bazel`:
+
+```python
+cc_library(
+    name = "my_library",
+    srcs = ["my_library.cpp"],
+    hdrs = ["my_library.h"],
+    deps = ["@etl//:etl"],
+)
+```
+
+### With WORKSPACE (legacy)
+
+In your `WORKSPACE` file:
+
+```python
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+git_repository(
+    name = "etl",
+    remote = "https://github.com/ETLCPP/etl.git",
+    tag = "20.47.1",
+)
+```
+
+Then use `deps = ["@etl//:etl"]` in your targets as shown above.
+
+## Project Structure
+
+| File | Purpose |
+|---|---|
+| `MODULE.bazel` | Module definition and dependencies |
+| `BUILD.bazel` | Exposes ETL as a `cc_library` |
+| `.bazelversion` | Bazel version for Bazelisk |
+| `.bazelrc` | Default Bazel settings |
+| `test/BUILD.bazel` | Unit test target |
+| `test/syntax_check/BUILD.bazel` | Header syntax check target |
+| `test/UnitTest++/BUILD.bazel` | Vendored UnitTest++ framework |
+
+## Cross-Compilation
+
+Bazel supports cross-compilation through its [platforms](https://bazel.build/extending/platforms) and [toolchains](https://bazel.build/extending/toolchains) system. Since ETL is a header-only library, there is nothing to cross-compile for the library itself. However, when building tests or consuming ETL in an application targeting a different architecture, you need to define a platform and register an appropriate C++ toolchain.
+
+Example platform definition (e.g. in a `platforms/BUILD.bazel`):
+
+```python
+platform(
+    name = "linux_arm64",
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:aarch64",
+    ],
+)
+```
+
+Then build with:
+
+```sh
+bazel build //:etl --platforms=//platforms:linux_arm64
+```
+
+> **Note:** You must also have a C++ toolchain registered that supports the target platform.
+> See the [Bazel toolchains documentation](https://bazel.build/extending/toolchains) for details.
+
+### Running Cross-Compiled Tests under QEMU
+
+Cross-compiled test binaries cannot run natively on the host. Pre-defined configurations in `.bazelrc` select the correct cross-compiler via `--repo_env=CC`, set the build flags to match `.devcontainer/run-tests.sh` (C++23, No-STL, `-O0`), and use `--run_under` to execute the resulting binary under the appropriate QEMU emulator:
+
+```sh
+# Cross-build and run tests for ARM (armhf)
+bazel test //test:etl_tests --config=armhf
+
+# Other architectures
+bazel test //test:etl_tests --config=i386
+bazel test //test:etl_tests --config=powerpc
+bazel test //test:etl_tests --config=riscv64
+bazel test //test:etl_tests --config=s390x
+```
+
+These configs are designed to run inside the Docker containers under `.devcontainer/`, which provide the cross-compiler toolchains and QEMU binaries. Each config sets `CC`, `AR`, `LD`, `NM`, `STRIP`, and `OBJDUMP` via `--repo_env` so that Bazel's auto-configured toolchain finds the complete prefixed cross-tool suite.
+
+You can also use `--run_under` directly for custom setups:
+
+```sh
+bazel test //test:etl_tests --run_under=/usr/bin/qemu-arm-static
+```
+
+## Compiler and Build Configuration
+
+Unlike CMake where options like `ETL_CXX_STANDARD` and `CMAKE_CXX_COMPILER` are set at configure time, Bazel uses command-line flags and `.bazelrc` configurations.
+
+### C++ Standard Version
+
+Use `--cxxopt` to pass the desired standard flag:
+
+```sh
+# C++17 (default in .bazelrc)
+bazel test //test:etl_tests --cxxopt=-std=c++17
+
+# C++20
+bazel test //test:etl_tests --cxxopt=-std=c++20
+
+# C++23
+bazel test //test:etl_tests --cxxopt=-std=c++23
+
+# C++14
+bazel test //test:etl_tests --cxxopt=-std=c++14
+```
+
+### Optimization Level
+
+Use `--compilation_mode` (shorthand `-c`) for standard profiles, or `--copt` for explicit flags:
+
+```sh
+# Debug (default) — no optimization, debug symbols
+bazel test //test:etl_tests -c dbg
+
+# Optimized — O2 with NDEBUG
+bazel test //test:etl_tests -c opt
+
+# Fast build — no optimization, no debug symbols
+bazel test //test:etl_tests -c fastbuild
+
+# Custom optimization level
+bazel test //test:etl_tests --copt=-O3
+bazel test //test:etl_tests --copt=-O1
+bazel test //test:etl_tests --copt=-Os
+```
+
+### Selecting the Compiler (GCC vs Clang)
+
+Bazel uses the system's default `CC` environment variable. Override it to switch compilers:
+
+```sh
+# Use Clang
+bazel test //test:etl_tests --repo_env=CC=clang
+
+# Use a specific GCC version
+bazel test //test:etl_tests --repo_env=CC=gcc-13
+
+# Use a specific Clang version
+bazel test //test:etl_tests --repo_env=CC=clang-18
+```
+
+> **Note:** Bazel's auto-configured toolchain infers the C++ compiler from `CC` automatically
+> (e.g. `CC=gcc-13` → `g++-13` for C++ compilation). There is no need to set `CXX` separately.
+
+### Combining Options
+
+Flags can be combined freely:
+
+```sh
+# Clang, C++20, optimized
+bazel test //test:etl_tests --repo_env=CC=clang --cxxopt=-std=c++20 -c opt
+
+# GCC 13, C++23, debug
+bazel test //test:etl_tests --repo_env=CC=gcc-13 --cxxopt=-std=c++23 -c dbg
+```
+
+### STL vs. No-STL Mode
+
+ETL can operate without the standard library, which is common on bare-metal embedded targets. Use `--copt` to define `ETL_NO_STL`:
+
+```sh
+# Build and test without STL
+bazel test //test:etl_tests --copt=-DETL_NO_STL
+
+# Build with STL (default, no flag needed)
+bazel test //test:etl_tests
+```
+
+When `ETL_NO_STL` is defined, ETL provides its own implementations of containers, algorithms, and utilities instead of delegating to `<algorithm>`, `<type_traits>`, etc.
+
+### Type Traits Configuration
+
+ETL supports three type traits strategies, controlled via preprocessor defines:
+
+| Mode | Define | Description |
+|---|---|---|
+| **STL type traits** | *(default)* | Uses `<type_traits>` from the standard library |
+| **Compiler builtins** | `ETL_USE_TYPE_TRAITS_BUILTINS` | Uses compiler intrinsics (`__is_trivially_copyable`, etc.) — useful when STL headers are unavailable or incomplete |
+| **User-defined** | `ETL_USER_DEFINED_TYPE_TRAITS` | Uses ETL's own type traits implementations |
+
+```sh
+# Use compiler built-in type traits
+bazel test //test:etl_tests --copt=-DETL_USE_TYPE_TRAITS_BUILTINS
+
+# Use ETL's own user-defined type traits
+bazel test //test:etl_tests --copt=-DETL_USER_DEFINED_TYPE_TRAITS
+```
+
+These are mutually exclusive — define at most one. If neither is defined and STL is available, ETL uses `<type_traits>`.
+
+### Other Configuration Defines
+
+Additional defines can be passed the same way via `--copt=-D...`:
+
+| Define | Description |
+|---|---|
+| `ETL_FORCE_TEST_CPP03_IMPLEMENTATION` | Force C++03 code paths even when a newer standard is available |
+| `ETL_MESSAGES_ARE_NOT_VIRTUAL` | Use non-virtual message types |
+
+```sh
+# Force C++03 implementation paths
+bazel test //test:etl_tests --copt=-DETL_FORCE_TEST_CPP03_IMPLEMENTATION
+```
+
+### Using `.bazelrc` Presets
+
+To avoid retyping flags, add configurations to `.bazelrc`:
+
+```
+# .bazelrc
+
+# Named configurations
+build:clang    --repo_env=CC=clang
+build:gcc13    --repo_env=CC=gcc-13
+build:c++20    --cxxopt=-std=c++20
+build:c++23    --cxxopt=-std=c++23
+build:release  --compilation_mode=opt
+```
+
+Then use them with `--config`:
+
+```sh
+bazel test //test:etl_tests --config=clang --config=c++20 --config=release
+```
--- a/test/BUILD.bazel
+++ b/test/BUILD.bazel
@ -0,0 +1,36 @@
+load("@rules_cc//cc:defs.bzl", "cc_test")
+
+cc_test(
+    name = "etl_tests",
+    size = "small",
+    srcs = glob(
+        [
+            "*.cpp",
+            "*.h",
+        ],
+        exclude = [
+            "maincpp03check.cpp",
+        ],
+    ),
+    copts = [
+        "-Itest",
+        "-fno-omit-frame-pointer",
+        "-fno-common",
+        "-pedantic-errors",
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-Wfloat-equal",
+        "-Wshadow",
+        "-Wnull-dereference",
+        "-Wsign-conversion",
+        "-Wextra-semi",
+        "-Wno-maybe-uninitialized",
+        "-g",
+    ],
+    linkopts = ["-latomic"],
+    deps = [
+        "//:etl",
+        "//test/UnitTest++:unittest-cpp",
+    ],
+)
--- a/test/UnitTest++/BUILD.bazel
+++ b/test/UnitTest++/BUILD.bazel
@ -0,0 +1,20 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "unittest-cpp",
+    srcs = glob(
+        [
+            "*.cpp",
+            "Posix/*.cpp",
+        ],
+    ),
+    hdrs = glob(
+        [
+            "*.h",
+            "Posix/*.h",
+        ],
+    ),
+    includes = ["."],
+)
--- a/test/syntax_check/BUILD.bazel
+++ b/test/syntax_check/BUILD.bazel
@ -0,0 +1,18 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "syntax_check",
+    srcs = glob(
+        ["*.t.cpp"],
+    ),
+    hdrs = ["etl_profile.h"],
+    copts = [
+        "-Itest/syntax_check",
+        "-pedantic-errors",
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+        "-Wextra-semi",
+    ],
+    deps = ["//:etl"],
+)