bump fork for version 0.42

.github/ISSUE_TEMPLATE/docs_report.yml

@@ -0,0 +1,55 @@
+name: Documentation Report
+description: Report a problem with the Yosys documentation
+labels: ["pending-verification"]
+body:
+  - type: markdown
+    attributes:
+      value: >
+
+        If you have a general question, please ask it in the [Discussions](https://github.com/YosysHQ/yosys/discussions) area
+        or join our [IRC Channel](https://web.libera.chat/#yosys) or [Community Slack](https://join.slack.com/t/yosyshq/shared_invite/zt-1aopkns2q-EiQ97BeQDt_pwvE41sGSuA).
+
+
+        If you have found a bug in Yosys, or in building the documentation,
+        please fill out the Bug Report issue form, this form is for problems
+        with the live documentation on [Read the
+        Docs](https://yosyshq.readthedocs.io/projects/yosys/).  Please only
+        report problems that appear on the latest version of the documentation.
+
+
+        Please contact [YosysHQ GmbH](https://www.yosyshq.com/) if you need
+        commercial support for Yosys.
+
+  - type: input
+    id: docs_url
+    attributes:
+      label: Link to page
+      description: "Please provide a link to the page where the problem was found."
+      placeholder: "e.g. https://yosyshq.readthedocs.io/projects/yosys/"
+    validations:
+      required: true
+
+  - type: input
+    id: build_number
+    attributes:
+      label: Build number
+      description: "If possible, please provide the latest build number from https://readthedocs.org/projects/yosys/builds/."
+      placeholder: "e.g. Build #24078236"
+    validations:
+      required: false
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Issue
+      description: "Please describe what is incorrect, invalid, or missing."
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected
+      description: "If applicable, please describe what should appear instead."
+    validations:
+      required: false

.github/actions/setup-build-env/action.yml

@@ -0,0 +1,33 @@
+name: Build environment setup
+description: Configure build env for Yosys builds
+runs:
+  using: composite
+  steps:
+    - name: Install Linux Dependencies
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        sudo apt-get update
+        sudo apt-get install gperf build-essential bison flex libreadline-dev gawk tcl-dev libffi-dev git graphviz xdot pkg-config python3 libboost-system-dev libboost-python-dev libboost-filesystem-dev zlib1g-dev
+
+    - name: Install macOS Dependencies
+      if: runner.os == 'macOS'
+      shell: bash
+      run: |
+        HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1 brew install bison flex gawk libffi pkg-config bash autoconf
+
+    - name: Linux runtime environment
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        echo "${{ github.workspace }}/.local/bin" >> $GITHUB_PATH
+        echo "procs=$(nproc)" >> $GITHUB_ENV
+
+    - name: macOS runtime environment
+      if: runner.os == 'macOS'
+      shell: bash
+      run: |
+        echo "${{ github.workspace }}/.local/bin" >> $GITHUB_PATH
+        echo "$(brew --prefix bison)/bin" >> $GITHUB_PATH
+        echo "$(brew --prefix flex)/bin" >> $GITHUB_PATH
+        echo "procs=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV

.github/workflows/extra-builds.yml

@@ -81,3 +81,17 @@ jobs:
           END
 
           make -C build -f ../Makefile CXX=clang -j$(nproc)
+
+  nix-build:
+    name: "Build nix flake"
+    needs: pre_job
+    if: needs.pre_job.outputs.should_skip != 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: cachix/install-nix-action@v26
+        with:
+          install_url: https://releases.nixos.org/nix/nix-2.18.1/install
+      - run: nix build .?submodules=1

.github/workflows/test-build.yml

@@ -0,0 +1,181 @@
+name: Build and run tests
+
+on: [push, pull_request]
+
+jobs:
+  pre_job:
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@v5
+        with:
+          paths_ignore: '["**/README.md", "docs/**", "guidelines/**"]'
+          # cancel previous builds if a new commit is pushed
+          cancel_others: 'true'
+          # only run on push *or* pull_request, not both
+          concurrent_skipping: 'same_content_newer'
+  pre_docs_job:
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@v5
+        with:
+          paths_ignore: '["**/README.md"]'
+          # cancel previous builds if a new commit is pushed
+          cancel_others: 'true'
+          # only run on push *or* pull_request, not both
+          concurrent_skipping: 'same_content_newer'
+
+  build-yosys:
+    name: Reusable build
+    runs-on: ${{ matrix.os }}
+    needs: pre_docs_job
+    if: needs.pre_docs_job.outputs.should_skip != 'true'
+    env:
+      CC: clang
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+      fail-fast: false
+    steps:
+      - name: Checkout Yosys
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-build-env
+
+      - name: Build
+        shell: bash
+        run: |
+          mkdir build
+          cd build
+          make -f ../Makefile config-$CC
+          make -f ../Makefile -j$procs
+
+      - name: Log yosys-config output
+        run: |
+          ./yosys-config || true
+
+      - name: Compress build
+        shell: bash
+        run: |
+          cd build
+          tar -cvf ../build.tar share/ yosys yosys-*
+
+      - name: Store build artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-${{ matrix.os }}
+          path: build.tar
+          retention-days: 1
+
+  test-yosys:
+    name: Run tests
+    runs-on: ${{ matrix.os }}
+    needs: [build-yosys, pre_job]
+    if: needs.pre_job.outputs.should_skip != 'true'
+    env:
+      CC: clang
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+      fail-fast: false
+    steps:
+      - name: Checkout Yosys
+        uses: actions/checkout@v4
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-build-env
+
+      - name: Get iverilog
+        shell: bash
+        run: |
+          git clone https://github.com/steveicarus/iverilog.git
+          cd iverilog
+          echo "IVERILOG_GIT=$(git rev-parse HEAD)" >> $GITHUB_ENV
+
+      - name: Cache iverilog
+        id: cache-iverilog
+        uses: actions/cache@v4
+        with:
+          path: .local/
+          key: ${{ matrix.os }}-${{ env.IVERILOG_GIT }}
+
+      - name: Build iverilog
+        if: steps.cache-iverilog.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          mkdir -p ${{ github.workspace }}/.local/
+          cd iverilog
+          autoconf
+          CC=gcc CXX=g++ ./configure --prefix=${{ github.workspace }}/.local
+          make -j$procs
+          make install
+
+      - name: Download build artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: build-${{ matrix.os }}
+
+      - name: Uncompress build
+        shell: bash
+        run:
+          tar -xvf build.tar
+
+      - name: Log yosys-config output
+        run: |
+          ./yosys-config || true
+
+      - name: Run tests
+        shell: bash
+        run: |
+          make -j$procs test TARGETS= EXTRA_TARGETS= CONFIG=$CC
+
+      - name: Report errors
+        if: ${{ failure() }}
+        shell: bash
+        run: |
+          find tests/**/*.err -print -exec cat {} \;
+
+  test-docs:
+    name: Run docs tests
+    runs-on: ${{ matrix.os }}
+    needs: [build-yosys, pre_docs_job]
+    if: needs.pre_docs_job.outputs.should_skip != 'true'
+    env:
+      CC: clang
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+      fail-fast: false
+    steps:
+      - name: Checkout Yosys
+        uses: actions/checkout@v4
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-build-env
+
+      - name: Download build artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: build-${{ matrix.os }}
+
+      - name: Uncompress build
+        shell: bash
+        run:
+          tar -xvf build.tar
+
+      - name: Log yosys-config output
+        run: |
+          ./yosys-config || true
+
+      - name: Run tests
+        shell: bash
+        run: |
+          make -C docs test -j${{ env.procs }}

.github/workflows/test-compile.yml

@@ -0,0 +1,79 @@
+name: Compiler testing
+
+on: [push, pull_request]
+
+jobs:
+  pre_job:
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@v5
+        with:
+          paths_ignore: '["**/README.md", "docs/**", "guidelines/**"]'
+          # cancel previous builds if a new commit is pushed
+          cancel_others: 'true'
+          # only run on push *or* pull_request, not both
+          concurrent_skipping: 'same_content_newer'
+
+  test-compile:
+    runs-on: ${{ matrix.os }}
+    needs: pre_job
+    if: needs.pre_job.outputs.should_skip != 'true'
+    env:
+      CXXFLAGS: ${{ startsWith(matrix.compiler, 'gcc') && '-Wp,-D_GLIBCXX_ASSERTIONS' || ''}}
+      CC_SHORT: ${{ startsWith(matrix.compiler, 'gcc') && 'gcc' || 'clang' }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+        compiler:
+          # oldest supported
+          - 'clang-14'
+          - 'gcc-10'
+          # newest
+          - 'clang'
+          - 'gcc'
+        include:
+          # macOS
+          - os: macos-13
+            compiler: 'clang'
+          # oldest clang not available on ubuntu-latest
+          - os: ubuntu-22.04
+            compiler: 'clang-11'
+      fail-fast: false
+    steps:
+      - name: Checkout Yosys
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Setup environment
+        uses: ./.github/actions/setup-build-env
+
+      - name: Setup Cpp
+        uses: aminya/setup-cpp@v1
+        with:
+          compiler: ${{ matrix.compiler }}
+
+      - name: Tool versions
+        shell: bash
+        run: |
+          $CC --version
+          $CXX --version
+
+      # minimum standard
+      - name: Build C++11
+        shell: bash
+        run: |
+          make config-$CC_SHORT
+          make -j$procs CXXSTD=c++11 compile-only
+
+      # maximum standard, only on newest compilers
+      - name: Build C++20
+        if: ${{ matrix.compiler == 'clang' || matrix.compiler == 'gcc'}}
+        shell: bash
+        run: |
+          make config-$CC_SHORT
+          make -j$procs CXXSTD=c++20 compile-only