hyperlight-libc 0.16.0

This crate provides picolibc for Hyperlight guests. It builds the picolibc library and generates bindings to the libc types and functions.
Documentation 
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name: Native

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  workflow_dispatch:

# When a PR is updated, cancel the jobs from the previous version. Merges
# do not define head_ref, so use run_id to never cancel those jobs.
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

env:
  DOCKERFILE: picolibc/.github/Dockerfile
  IMAGE_FILE: dockerimg-linux.tar.zst
  IMAGE: picolibc-linux
  PACKAGES_FILE: picolibc/.github/linux-packages.txt
  EXTRA_FILE: picolibc/.github/linux-files.txt

jobs:
  cache-maker:
    runs-on: ubuntu-latest
    steps:
      - name: Clone picolibc
        uses: actions/checkout@v6
        with:
          path: picolibc

      - name: Cache the Docker Image
        id: cache
        uses: actions/cache@v5
        with:
          path: ${{ env.IMAGE_FILE }}
          key: ${{ env.IMAGE_FILE }}-${{ hashFiles( env.DOCKERFILE, env.PACKAGES_FILE, env.EXTRA_FILE ) }}
          lookup-only: true

      - name: Set up Docker Buildx
        if: steps.cache.outputs.cache-hit != 'true'
        uses: docker/setup-buildx-action@v3

      - name: Build picolibc container
        if: steps.cache.outputs.cache-hit != 'true'
        uses: docker/build-push-action@v6
        with:
          platforms: linux/amd64
          file: .github/Dockerfile
          tags: ${{ env.IMAGE }}:latest
          outputs: type=docker,force-compression=true,compression=zstd,compression-level=22,dest=${{ env.IMAGE_FILE }}

  minsize-native:
    needs: cache-maker
    runs-on: ubuntu-latest
    strategy:
      matrix:
        meson_flags: [
          "",

          # math configurations, one with multithread disabled and with locale, original malloc and atexit/onexit code
          "-Dio-float-exact=false -Dio-long-long=true -Dio-percent-b=true -Dio-long-double=true -Dnewlib-obsolete-math=false -Dwant-math-errno=true -Dsingle-thread=true -Dmb-capable=true -Dmb-extended-charsets=true -Dprintf-small-ultoa=true -Dprintf-percent-n=true",
          "-Dformat-default=integer -Dfreestanding=true -Dnewlib-obsolete-math=true -Dwant-math-errno=true -Dassert-verbose=false -Dfast-bufio=true -Dstdio-locking=true -Dfstat-bufsiz=true",
        ]
        test: [
          "./.github/do-native-math",
        ]
    steps:
      - name: Clone picolibc
        uses: actions/checkout@v6
        with:
          path: picolibc

      - name: Restore the Docker Image
        uses: actions/cache@v5
        with:
          path: ${{ env.IMAGE_FILE }}
          key: ${{ env.IMAGE_FILE }}-${{ hashFiles( env.DOCKERFILE, env.PACKAGES_FILE, env.EXTRA_FILE ) }}
          fail-on-cache-miss: true

      - name: Load and Check the Docker Image
        run: |
          docker load -i $IMAGE_FILE
          docker images -a $IMAGE
      - name: Minsize test
        run: |
          docker run -v $(readlink -f picolibc):/picolibc -w /picolibc $IMAGE ${{ matrix.test }} ${{ matrix.meson_flags }} --buildtype minsize
  release-native:
    needs: cache-maker
    runs-on: ubuntu-latest
    strategy:
      matrix:
        meson_flags: [
          "",

          # math configurations, one with multithread disabled and with locale, original malloc and atexit/onexit code
          "-Dio-float-exact=false -Dio-long-long=true -Dio-percent-b=true -Dio-long-double=true -Dnewlib-obsolete-math=false -Dwant-math-errno=true -Dsingle-thread=true -Dmb-capable=true -Dmb-extended-charsets=true -Dprintf-small-ultoa=true -Dprintf-percent-n=true",
          "-Dformat-default=integer -Dfreestanding=true -Dnewlib-obsolete-math=true -Dwant-math-errno=true -Dassert-verbose=false -Dfast-bufio=true -Dstdio-locking=true -Dfstat-bufsiz=true",
        ]
        test: [
          "./.github/do-native-math",
        ]
    steps:
      - name: Clone picolibc
        uses: actions/checkout@v6
        with:
          path: picolibc

      - name: Restore the Docker Image
        uses: actions/cache@v5
        with:
          path: ${{ env.IMAGE_FILE }}
          key: ${{ env.IMAGE_FILE }}-${{ hashFiles( env.DOCKERFILE, env.PACKAGES_FILE, env.EXTRA_FILE ) }}
          fail-on-cache-miss: true

      - name: Load and Check the Docker Image
        run: |
          docker load -i $IMAGE_FILE
          docker images -a $IMAGE
      - name: Release test
        run: |
          docker run -v $(readlink -f picolibc):/picolibc -w /picolibc $IMAGE ${{ matrix.test }} ${{ matrix.meson_flags }} --buildtype release