Add cross-compilation support for Shardok Docker builds (#4772)

* Add cross-compilation support for Shardok Docker builds This enables building Shardok on the self-hosted Mac runner while targeting Linux x86_64, avoiding the need for slow GitHub-hosted Ubuntu runners. Changes: - Add Ubuntu 24.04 (Noble) sysroot generation scripts - Add GitHub Actions workflow to build and release the sysroot - Configure toolchains_llvm for cross-compilation with sysroot - Update docker_build.yml to use cross-compilation - Add linux_x86_64 platform definition The sysroot contains libstdc++-13 which provides C++23 support needed by the codebase. To complete setup: 1. Run the "Build Linux Sysroot" workflow to create the sysroot 2. Update MODULE.bazel with the actual sha256 from the release 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> * Temporarily disable Shardok build until sysroot is ready The cross-compilation sysroot needs to be built and uploaded before Shardok can be built. Steps to re-enable: 1. Run "Build Linux Sysroot" workflow 2. Update sha256 in MODULE.bazel 3. Uncomment build-shardok job 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> --------- Co-authored-by: Claude <noreply@anthropic.com>
2026-07-28 21:55:42 +00:00 · 2025-12-23 06:58:23 -08:00
parent 1617867c60
commit 844e2b0407
7 changed files with 240 additions and 116 deletions
@@ -0,0 +1,50 @@
+name: Build Linux Sysroot
+
+on:
+  workflow_dispatch:
+    inputs:
+      create_release:
+        description: 'Create a GitHub release with the sysroot'
+        required: true
+        default: 'true'
+        type: boolean
+
+permissions:
+  contents: write
+
+jobs:
+  build-sysroot:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build sysroot
+        run: ./tools/sysroot/build_sysroot.sh
+
+      - name: Upload sysroot artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ubuntu-noble-sysroot
+          path: tools/sysroot/output/
+
+      - name: Create Release
+        if: ${{ inputs.create_release }}
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: sysroot-noble-v1
+          name: Ubuntu 24.04 Noble Sysroot
+          body: |
+            Ubuntu 24.04 (Noble) sysroot for cross-compilation from macOS to Linux.
+
+            Contains:
+            - libstdc++-13 (C++23 support)
+            - libc6-dev
+            - linux-libc-dev
+            - zlib1g-dev
+            - libssl-dev
+
+            Use with toolchains_llvm sysroot rule.
+          files: |
+            tools/sysroot/output/ubuntu_noble_amd64_sysroot.tar.xz
+            tools/sysroot/output/ubuntu_noble_amd64_sysroot.sha256
@@ -38,28 +38,22 @@ jobs:
        if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && github.event.inputs.push_images == 'true')
        run: bazel run //ci:eagle_server_push

-  build-shardok:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          lfs: false
-
-      - name: Set up Bazel
-        uses: bazelbuild/setup-bazelisk@v3
-
-      - name: Cache Bazel
-        uses: actions/cache@v4
-        with:
-          path: ~/.cache/bazel
-          key: bazel-shardok-${{ runner.os }}-${{ hashFiles('MODULE.bazel', 'MODULE.bazel.lock') }}
-          restore-keys: |
-            bazel-shardok-${{ runner.os }}-
-
-      - name: Build Shardok Docker image
-        run: bazel build //ci:shardok_server_image
-
-      - name: Push Shardok image to DO registry
-        if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && github.event.inputs.push_images == 'true')
-        run: bazel run //ci:shardok_server_push
+  # TODO: Re-enable after sysroot is built and sha256 is updated in MODULE.bazel
+  # 1. Run "Build Linux Sysroot" workflow
+  # 2. Update sha256 in MODULE.bazel with value from release
+  # 3. Uncomment this job
+  #
+  # build-shardok:
+  #   runs-on: self-hosted
+  #   steps:
+  #     - name: Checkout repository
+  #       uses: actions/checkout@v4
+  #       with:
+  #         lfs: false
+  #
+  #     - name: Build Shardok Docker image (cross-compile for Linux)
+  #       run: bazel build --platforms=//:linux_x86_64 //ci:shardok_server_image
+  #
+  #     - name: Push Shardok image to DO registry
+  #       if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && github.event.inputs.push_images == 'true')
+  #       run: bazel run --platforms=//:linux_x86_64 //ci:shardok_server_push
@@ -3,6 +3,15 @@ load("@io_bazel_rules_go//go:def.bzl", "nogo")

 package(default_visibility = ["//visibility:public"])

+# Platform for cross-compiling to Linux x86_64
+platform(
+    name = "linux_x86_64",
+    constraint_values = [
+        "@platforms//os:linux",
+        "@platforms//cpu:x86_64",
+    ],
+)
+
 gazelle(name = "gazelle")

 # gazelle:proto file
@@ -40,14 +40,42 @@ scala_deps.scala_proto()
 # Language Support - C++
 #

-bazel_dep(name = "toolchains_llvm", version = "1.4.0")
+bazel_dep(name = "toolchains_llvm", version = "1.6.0")

 llvm = use_extension("@toolchains_llvm//toolchain/extensions:llvm.bzl", "llvm")
+
+# Native toolchain (macOS -> macOS, Linux -> Linux)
 llvm.toolchain(
    name = "llvm_toolchain",
    llvm_version = "20.1.2",
 )
-use_repo(llvm, "llvm_toolchain")
+
+# Cross-compilation toolchain (macOS -> Linux x86_64)
+# Uses the same LLVM distribution but with a Linux sysroot
+llvm.toolchain(
+    name = "llvm_toolchain_linux",
+    llvm_version = "20.1.2",
+)
+
+# Linux sysroot for cross-compilation (Chromium's Debian sysroot)
+llvm.sysroot(
+    name = "llvm_toolchain_linux",
+    label = "@linux_sysroot//sysroot",
+    targets = ["linux-x86_64"],
+)
+
+use_repo(llvm, "llvm_toolchain", "llvm_toolchain_linux")
+
+# Download the Linux sysroot (Ubuntu 24.04 Noble for C++23 support)
+# Built by: .github/workflows/build_sysroot.yml
+# To rebuild: Run the "Build Linux Sysroot" workflow and update sha256
+sysroot = use_repo_rule("@toolchains_llvm//toolchain:sysroot.bzl", "sysroot")
+sysroot(
+    name = "linux_sysroot",
+    # TODO: Update sha256 after first sysroot build
+    sha256 = "0000000000000000000000000000000000000000000000000000000000000000",
+    urls = ["https://github.com/nolen777/eagle0/releases/download/sysroot-noble-v1/ubuntu_noble_amd64_sysroot.tar.xz"],
+)

 #
 # Language Support - Go
@@ -236,5 +264,6 @@ register_toolchains(
 # Set dev_dependency so we can turn this off for swift MacOS builds
 register_toolchains(
    "@llvm_toolchain//:all",
+    "@llvm_toolchain_linux//:all",
    dev_dependency = True,
 )
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+    "https://bcr.bazel.build/modules/bazel_features/1.28.0/MODULE.bazel": "4b4200e6cbf8fa335b2c3f43e1d6ef3e240319c33d43d60cc0fbd4b87ece299d",
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@@ -71,7 +76,8 @@
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+    "https://bcr.bazel.build/modules/rules_shell/0.4.1/MODULE.bazel": "00e501db01bbf4e3e1dd1595959092c2fadf2087b2852d3f553b5370f5633592",
+    "https://bcr.bazel.build/modules/rules_shell/0.4.1/source.json": "4757bd277fe1567763991c4425b483477bb82e35e777a56fd846eb5cceda324a",
    "https://bcr.bazel.build/modules/rules_swift/1.16.0/MODULE.bazel": "4a09f199545a60d09895e8281362b1ff3bb08bbde69c6fc87aff5b92fcc916ca",
    "https://bcr.bazel.build/modules/rules_swift/1.18.0/MODULE.bazel": "a6aba73625d0dc64c7b4a1e831549b6e375fbddb9d2dde9d80c9de6ec45b24c9",
    "https://bcr.bazel.build/modules/rules_swift/2.1.1/MODULE.bazel": "494900a80f944fc7aa61500c2073d9729dff0b764f0e89b824eb746959bc1046",
@@ -343,14 +359,19 @@
    "https://bcr.bazel.build/modules/stardoc/0.7.2/source.json": "58b029e5e901d6802967754adf0a9056747e8176f017cfe3607c0851f4d42216",
    "https://bcr.bazel.build/modules/swift_argument_parser/1.3.1.1/MODULE.bazel": "5e463fbfba7b1701d957555ed45097d7f984211330106ccd1352c6e0af0dcf91",
    "https://bcr.bazel.build/modules/swift_argument_parser/1.3.1.1/source.json": "32bd87e5f4d7acc57c5b2ff7c325ae3061d5e242c0c4c214ae87e0f1c13e54cb",
-    "https://bcr.bazel.build/modules/toolchains_llvm/1.4.0/MODULE.bazel": "05239402b7374293359c2f22806f420b75aa5d6f4b15a2eaa809a2c214d58b31",
-    "https://bcr.bazel.build/modules/toolchains_llvm/1.4.0/source.json": "229a516d282b17a82be54c6e3ae220a1b750fb55a8495567e5c7a9d09423f3e2",
+    "https://bcr.bazel.build/modules/tar.bzl/0.2.1/MODULE.bazel": "52d1c00a80a8cc67acbd01649e83d8dd6a9dc426a6c0b754a04fe8c219c76468",
+    "https://bcr.bazel.build/modules/tar.bzl/0.6.0/MODULE.bazel": "a3584b4edcfafcabd9b0ef9819808f05b372957bbdff41601429d5fd0aac2e7c",
+    "https://bcr.bazel.build/modules/tar.bzl/0.6.0/source.json": "4a620381df075a16cb3a7ed57bd1d05f7480222394c64a20fa51bdb636fda658",
+    "https://bcr.bazel.build/modules/toolchains_llvm/1.6.0/MODULE.bazel": "39603859cafb1c6830160fcd6370552e836790e6abb2bfb8d13bff53c0c10a64",
+    "https://bcr.bazel.build/modules/toolchains_llvm/1.6.0/source.json": "6bd3ef95a288dd2bb1582eca332af850c9a5428a23bb92cb1c57c2dfe6cb7369",
    "https://bcr.bazel.build/modules/upb/0.0.0-20211020-160625a/MODULE.bazel": "6cced416be2dc5b9c05efd5b997049ba795e5e4e6fafbe1624f4587767638928",
    "https://bcr.bazel.build/modules/upb/0.0.0-20220923-a547704/MODULE.bazel": "7298990c00040a0e2f121f6c32544bab27d4452f80d9ce51349b1a28f3005c43",
    "https://bcr.bazel.build/modules/upb/0.0.0-20230516-61a97ef/MODULE.bazel": "c0df5e35ad55e264160417fd0875932ee3c9dda63d9fccace35ac62f45e1b6f9",
    "https://bcr.bazel.build/modules/upb/0.0.0-20230907-e7430e6/MODULE.bazel": "3a7dedadf70346e678dc059dbe44d05cbf3ab17f1ce43a1c7a42edc7cbf93fd9",
    "https://bcr.bazel.build/modules/xds/0.0.0-20240423-555b57e/MODULE.bazel": "cea509976a77e34131411684ef05a1d6ad194dd71a8d5816643bc5b0af16dc0f",
    "https://bcr.bazel.build/modules/xds/0.0.0-20240423-555b57e/source.json": "7227e1fcad55f3f3cab1a08691ecd753cb29cc6380a47bc650851be9f9ad6d20",
+    "https://bcr.bazel.build/modules/yq.bzl/0.1.1/MODULE.bazel": "9039681f9bcb8958ee2c87ffc74bdafba9f4369096a2b5634b88abc0eaefa072",
+    "https://bcr.bazel.build/modules/yq.bzl/0.1.1/source.json": "2d2bad780a9f2b9195a4a370314d2c17ae95eaa745cefc2e12fbc49759b15aa3",
    "https://bcr.bazel.build/modules/zlib/1.2.11/MODULE.bazel": "07b389abc85fdbca459b69e2ec656ae5622873af3f845e1c9d80fe179f3effa0",
    "https://bcr.bazel.build/modules/zlib/1.2.12/MODULE.bazel": "3b1a8834ada2a883674be8cbd36ede1b6ec481477ada359cd2d3ddc562340b27",
    "https://bcr.bazel.build/modules/zlib/1.2.13/MODULE.bazel": "aa6deb1b83c18ffecd940c4119aff9567cd0a671d7bba756741cb2ef043a29d5",
@@ -392,7 +413,7 @@
    },
    "@@aspect_rules_esbuild~//esbuild:extensions.bzl%esbuild": {
      "general": {
-        "bzlTransitiveDigest": "D/zu4E8zxQ3eb2DFCQIP4FDwW0VhIpl2u1y/GEEedjo=",
+        "bzlTransitiveDigest": "8jv3p0xDR/oitFeH8y0+Y5xlyrUbfsTRlc9TSwYkwl8=",
        "usagesDigest": "iDVoyPxUeADmfK8ssoyG3Ehq1bj6p7A43LpEiE266os=",
        "recordedFileInputs": {},
        "recordedDirentsInputs": {},
@@ -1271,7 +1292,7 @@
    },
    "@@rules_oci~//oci:extensions.bzl%oci": {
      "general": {
-        "bzlTransitiveDigest": "nL4lxuNPClkACiq92K0dVNQSQkzo7uhc/6uIktBoG6w=",
+        "bzlTransitiveDigest": "FaY+7xb13bB3hmxqwAWaGp3Tf3Q4Nfdlr+F38CP5mcg=",
        "usagesDigest": "BuciKSozbpJMD9EP+j0RG5ZgrYMeDPsQyiOnLUni2V8=",
        "recordedFileInputs": {},
        "recordedDirentsInputs": {},
@@ -1538,7 +1559,7 @@
    },
    "@@rules_scala~//scala/extensions:deps.bzl%scala_deps": {
      "general": {
-        "bzlTransitiveDigest": "F2PMm61fmZ/IE+VSw1rigJ71hBDD7k3vqyYR1/GgXeA=",
+        "bzlTransitiveDigest": "5SDZrXQHW6tI/VEw+La2OPOK4ZWm0LGTxnChXOXBCag=",
        "usagesDigest": "kwo8oolISmSSITnit4b4S0vBiUtHlHK0WLDUwScxmOg=",
        "recordedFileInputs": {},
        "recordedDirentsInputs": {},
@@ -5149,85 +5170,6 @@
          ]
        ]
      }
-    },
-    "@@toolchains_llvm~//toolchain/extensions:llvm.bzl%llvm": {
-      "general": {
-        "bzlTransitiveDigest": "afRF0aFOIUrkYl3o040WQ606ep1qciEXzjnAxT3Kek8=",
-        "usagesDigest": "sYVuhiCAQehFTnGTv0bNtTBR4WorebpWBNxF0mRusyw=",
-        "recordedFileInputs": {},
-        "recordedDirentsInputs": {},
-        "envVariables": {},
-        "generatedRepoSpecs": {
-          "llvm_toolchain_llvm": {
-            "bzlFile": "@@toolchains_llvm~//toolchain:rules.bzl",
-            "ruleClassName": "llvm",
-            "attributes": {
-              "alternative_llvm_sources": [],
-              "auth_patterns": {},
-              "distribution": "auto",
-              "exec_arch": "",
-              "exec_os": "",
-              "libclang_rt": {},
-              "llvm_mirror": "",
-              "llvm_version": "20.1.2",
-              "llvm_versions": {},
-              "netrc": "",
-              "sha256": {},
-              "strip_prefix": {},
-              "urls": {}
-            }
-          },
-          "llvm_toolchain": {
-            "bzlFile": "@@toolchains_llvm~//toolchain:rules.bzl",
-            "ruleClassName": "toolchain",
-            "attributes": {
-              "absolute_paths": false,
-              "archive_flags": {},
-              "compile_flags": {},
-              "conly_flags": {},
-              "coverage_compile_flags": {},
-              "coverage_link_flags": {},
-              "cxx_builtin_include_directories": {},
-              "cxx_flags": {},
-              "cxx_standard": {},
-              "dbg_compile_flags": {},
-              "exec_arch": "",
-              "exec_os": "",
-              "extra_exec_compatible_with": {},
-              "extra_target_compatible_with": {},
-              "link_flags": {},
-              "link_libs": {},
-              "llvm_versions": {
-                "": "20.1.2"
-              },
-              "opt_compile_flags": {},
-              "opt_link_flags": {},
-              "stdlib": {},
-              "target_settings": {},
-              "unfiltered_compile_flags": {},
-              "toolchain_roots": {},
-              "sysroot": {}
-            }
-          }
-        },
-        "recordedRepoMappingEntries": [
-          [
-            "toolchains_llvm~",
-            "bazel_skylib",
-            "bazel_skylib~"
-          ],
-          [
-            "toolchains_llvm~",
-            "bazel_tools",
-            "bazel_tools"
-          ],
-          [
-            "toolchains_llvm~",
-            "toolchains_llvm",
-            "toolchains_llvm~"
-          ]
-        ]
-      }
    }
  }
 }
@@ -0,0 +1,30 @@
+# Dockerfile to create Ubuntu 24.04 (Noble) sysroot for cross-compilation
+#
+# This creates a minimal sysroot containing headers and libraries needed
+# to cross-compile C++ code targeting Linux x86_64.
+
+FROM ubuntu:24.04
+
+# Install the packages we need in the sysroot
+# These provide headers and libraries for linking
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    # C++ standard library with C++23 support (GCC 13)
+    libstdc++-13-dev \
+    # C library
+    libc6-dev \
+    # Linux kernel headers
+    linux-libc-dev \
+    # Common dependencies
+    zlib1g-dev \
+    libssl-dev \
+    # Clean up
+    && rm -rf /var/lib/apt/lists/*
+
+# Create a script to extract the sysroot
+RUN mkdir -p /sysroot
+
+# Copy the essential directories for cross-compilation
+RUN cp -a /usr/include /sysroot/ && \
+    cp -a /usr/lib/x86_64-linux-gnu /sysroot/usr_lib && \
+    mkdir -p /sysroot/lib && \
+    cp -a /lib/x86_64-linux-gnu /sysroot/lib/
@@ -0,0 +1,70 @@
+#!/bin/bash
+#
+# Build an Ubuntu 24.04 (Noble) sysroot for cross-compilation
+#
+# This script:
+# 1. Builds a Docker image with the required packages
+# 2. Extracts the sysroot files
+# 3. Creates a tarball with proper structure for toolchains_llvm
+# 4. Computes the SHA256 hash
+#
+# Output: ubuntu_noble_amd64_sysroot.tar.xz and its SHA256
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+OUTPUT_DIR="${SCRIPT_DIR}/output"
+SYSROOT_NAME="ubuntu_noble_amd64_sysroot"
+
+echo "=== Building Ubuntu 24.04 sysroot ==="
+
+# Create output directory
+mkdir -p "${OUTPUT_DIR}"
+
+# Build the Docker image
+echo "Building Docker image..."
+docker build -t sysroot-builder "${SCRIPT_DIR}"
+
+# Create a container and extract the sysroot
+echo "Extracting sysroot..."
+CONTAINER_ID=$(docker create sysroot-builder)
+
+# Create the sysroot structure expected by toolchains_llvm
+TEMP_DIR=$(mktemp -d)
+SYSROOT_DIR="${TEMP_DIR}/sysroot"
+mkdir -p "${SYSROOT_DIR}/usr/lib" "${SYSROOT_DIR}/lib"
+
+# Extract files from container
+docker cp "${CONTAINER_ID}:/sysroot/include" "${SYSROOT_DIR}/usr/"
+docker cp "${CONTAINER_ID}:/sysroot/usr_lib" "${SYSROOT_DIR}/usr/lib/x86_64-linux-gnu"
+docker cp "${CONTAINER_ID}:/sysroot/lib/x86_64-linux-gnu" "${SYSROOT_DIR}/lib/"
+
+# Also need lib64 symlink for some builds
+ln -sf lib "${SYSROOT_DIR}/lib64"
+
+# Create the tarball
+echo "Creating tarball..."
+cd "${TEMP_DIR}"
+tar -cJf "${OUTPUT_DIR}/${SYSROOT_NAME}.tar.xz" sysroot
+
+# Compute SHA256
+echo "Computing SHA256..."
+SHA256=$(shasum -a 256 "${OUTPUT_DIR}/${SYSROOT_NAME}.tar.xz" | cut -d' ' -f1)
+echo "${SHA256}" > "${OUTPUT_DIR}/${SYSROOT_NAME}.sha256"
+
+# Cleanup
+docker rm "${CONTAINER_ID}" > /dev/null
+rm -rf "${TEMP_DIR}"
+
+echo ""
+echo "=== Sysroot build complete ==="
+echo "Tarball: ${OUTPUT_DIR}/${SYSROOT_NAME}.tar.xz"
+echo "SHA256:  ${SHA256}"
+echo ""
+echo "To use this sysroot, upload it somewhere accessible and update MODULE.bazel:"
+echo ""
+echo "sysroot("
+echo "    name = \"linux_sysroot\","
+echo "    sha256 = \"${SHA256}\","
+echo "    urls = [\"<your-upload-url>/${SYSROOT_NAME}.tar.xz\"],"
+echo ")"