Various changes and improvements.

.gitattributes

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+* text=auto
+* eol=lf

.github/workflows/deploy.yml

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+name: Deploy PPA
+
+on:
+  push:
+    branches: djgpp-ppa
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ubuntu-version: [ bionic, focal, impish, jammy ]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install curl git debhelper devscripts dput gpg
+
+      - name: Download sources
+        run: |
+          ./build-djgpp.sh --batch --build-deb --only-download --ignore-dependencies djgpp-cvs binutils gcc gdb
+
+      - name: Pack git sources
+        run: |
+          find download/*/* ! -wholename '*/.git/*' -delete || true
+          cd download/
+          for DIR in */; do
+            DIR=${DIR%/}
+            tar -c -f $DIR-git.tar $DIR
+          done
+          rm -rf */
+
+      - name: Setup package files
+        env:
+          UBUNTU_VERSION: ${{ matrix.ubuntu-version }}
+        run: |
+          mv debian/Makefile .
+          mv debian/pgp-secret.asc /tmp/
+          sed -i "s/UBUNTU_VERSION/$UBUNTU_VERSION/g" debian/changelog
+          if [ -d debian/$UBUNTU_VERSION ]; then cp debian/$UBUNTU_VERSION/* debian/; fi
+
+      - name: Make source package
+        run: |
+          debuild -S -us -uc -d
+
+      - name: Import signing key
+        env:
+          DECRYPT_KEY: ${{ secrets.DECRYPT_KEY }}
+        run: |
+          gpg --batch -k > /dev/null
+          gpg --batch --quiet --passphrase "$DECRYPT_KEY" -d /tmp/pgp-secret.asc | gpg --batch --import
+          rm -f /tmp/pgp-secret.asc
+          gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 197C3D6E652B6B1C2B7F9EDF84089D0351487AB8
+
+      - name: Sign package
+        run: |
+          debsign -k197C3D6E652B6B1C2B7F9EDF84089D0351487AB8 ../*.changes
+
+      - name: Delete key
+        if: always()
+        run: |
+          sudo shred -fu $(gpgconf --list-dirs | grep homedir | sed 's/homedir://')/priv*/*
+
+      - name: Upload package
+        run: |
+          dput ppa:jwt27/djgpp-toolchain ../*.changes

.github/workflows/main.yml

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+name: Test builds
+
+on:
+  push:
+    branches-ignore: djgpp-ppa
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, macos-latest ]
+        build-type: [ clean ]
+        env:
+          -
+            TARGET: i386-pc-msdosdjgpp
+            PACKAGES: binutils gcc djgpp-2.05 watt32
+          -
+            TARGET: i386-pc-msdosdjgpp
+            PACKAGES: binutils gcc djgpp-cvs watt32
+          -
+            TARGET: i386-pc-msdosdjgpp
+            PACKAGES: gdb
+          -
+            TARGET: arm-eabi
+            PACKAGES: binutils gcc newlib
+          -
+            TARGET: arm-eabi
+            PACKAGES: gdb
+          -
+            TARGET: avr
+            PACKAGES: binutils gcc avr-libc
+          -
+            TARGET: avr
+            PACKAGES: gdb avarice simulavr avrdude
+          -
+            TARGET: ia16-elf
+            PACKAGES: binutils gcc newlib
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Clear apt package cache
+        if: contains(matrix.os, 'ubuntu')
+        run: |
+          sudo apt-get clean
+
+      - name: Clear brew package cache
+        if: contains(matrix.os, 'macos')
+        run: |
+          rm -rf $(brew --cache)
+
+      - name: Cache apt package lists
+        uses: jwt27/cache@dist
+        if: contains(matrix.os, 'ubuntu')
+        with:
+          path: /var/lib/apt/lists
+          key: testbuild-apt-lists-${{ github.sha }}
+          restore-keys: |
+            testbuild-apt-lists-
+
+      - name: Cache apt package cache
+        uses: jwt27/cache@dist
+        if: contains(matrix.os, 'ubuntu')
+        with:
+          path: /var/cache/apt
+          key: testbuild-apt-cache-${{ github.sha }}
+          restore-keys: |
+            testbuild-apt-cache-
+
+      - name: Cache brew package cache
+        uses: jwt27/cache@dist
+        if: contains(matrix.os, 'macos')
+        with:
+          path: ~/Library/Caches/Homebrew
+          key: testbuild-brew-cache-${{ github.sha }}
+          restore-keys: |
+            testbuild-brew-cache-
+
+      - name: Install dependencies (ubuntu)
+        if: contains(matrix.os, 'ubuntu')
+        run: |
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+          sudo apt-get update
+          sudo apt-get install bison flex curl make texinfo zlib1g-dev tar bzip2 gzip xz-utils unzip dos2unix libtool-bin gcc-11 g++-11 cmake help2man python2-dev nasm
+          echo "CC=gcc-11" >> $GITHUB_ENV
+          echo "CXX=g++-11" >> $GITHUB_ENV
+
+      - name: Install dependencies (macos)
+        if: contains(matrix.os, 'macos')
+        run: |
+          brew update
+          brew install bash bison flex curl make texinfo zlib bzip2 gzip xz unzip dos2unix libtool cmake help2man nasm
+
+      - name: Cache sources
+        uses: jwt27/cache@dist
+        with:
+          path: download
+          key: testbuild-sources-${{ matrix.os }}-${{ matrix.env.TARGET }}-${{ matrix.env.PACKAGES }}-${{ github.sha }}
+          restore-keys: |
+            testbuild-sources-${{ matrix.os }}-${{ matrix.env.TARGET }}-${{ matrix.env.PACKAGES }}-
+
+      - name: Download sources
+        env:
+          TARGET: ${{ matrix.env.TARGET }}
+          PACKAGES: ${{ matrix.env.PACKAGES }}
+        run: ./script/select-script.sh --only-download
+
+      - name: Cache build output
+        uses: jwt27/cache@dist
+        if: matrix.build-type == 'rebuild'
+        id: cache-build
+        with:
+          path: build
+          key: testbuild-build-${{ matrix.os }}-${{ matrix.env.TARGET }}-${{ matrix.env.PACKAGES }}-${{ github.sha }}
+          restore-keys: |
+            testbuild-build-${{ matrix.os }}-${{ matrix.env.TARGET }}-${{ matrix.env.PACKAGES }}-
+
+      - name: Clean build
+        if: matrix.build-type == 'clean'
+        env:
+          TARGET: ${{ matrix.env.TARGET }}
+        run: ./script/select-script.sh --no-download --prefix=${{ github.workspace }}-${{ github.sha }} ${{ matrix.env.PACKAGES }}
+
+      - name: Rebuild
+        if: matrix.build-type == 'rebuild'
+        env:
+          TARGET: ${{ matrix.env.TARGET }}
+        run: ./script/select-script.sh --no-download --prefix=${{ github.workspace }} ${{ matrix.env.PACKAGES }}
+
+      - name: Rebuild if uncached
+        if: matrix.build-type == 'rebuild' && steps.cache-build.outputs.cache-hit != 'true'
+        env:
+          TARGET: ${{ matrix.env.TARGET }}
+        run: ./script/select-script.sh --no-download --prefix=${{ github.workspace }} ${{ matrix.env.PACKAGES }}
+
+      - name: Clear and pack git sources before caching
+        if: matrix.build-type == 'clean'
+        run: |
+          find download/*/* ! -wholename '*/.git/*' -delete || true
+          cd download
+          for DIR in */; do
+            DIR=${DIR%/}
+            tar -c -f $DIR-git.tar $DIR
+          done
+          rm -rf */

.gitignore

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 build/
 download/
+install/
+/Makefile