The first attempt

Author: Oleg Samarin

.github/workflows/build.yml

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+name: Build
+
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-24
+    steps:
+    - uses: actions/checkout@v4.1.1
+    
+    - name: Install Dependencies
+      run: ${{github.workspace}}/build-scripts/for-linux/prepare-ubuntu.bash
+      
+    - name: Build
+      working-directory: ${{github.workspace}}
+      run: ${{github.workspace}}/build-scripts/for-linux/build-on-ubuntu.bash
+
+    - name: Upload result
+      uses: nanoufo/action-upload-artifacts-and-release-assets@v2
+      with:
+        path: |
+          ${{github.workspace}}/build/ubuntu/*.deb
+        upload-release-files: ${{ needs.calc_ver.outputs.release_flag }}
+        release-upload-url: ${{ needs.calc_ver.outputs.release_upload_url }}
+        if-no-files-found: error
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+#  release:
+#    needs: [calc_ver, build]
+#    if: ${{ needs.calc_ver.outputs.release_flag == 'ON' }}
+#    runs-on: ubuntu-latest
+#    steps:
+#      
+#    - uses: eregon/publish-release@v1
+#      env:
+#        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+#      with:
+#        release_id: ${{ needs.calc_ver.outputs.release_id }}

build-scripts/for-linux/build-on-ubuntu.bash

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+#!/bin/bash
+
+set -e
+
+mkdir -p build/ubuntu
+pushd build/ubuntu
+
+cp -av /usr/src/gcc-mingw-w64-src/* ./
+rm -rf gcc-mingw-w64-*
+dpkg-source -x gcc-mingw-w64*.dsc
+
+cd gcc-mingw-w64-*
+debuild -us -uc
+
+popd

build-scripts/for-linux/prepare-ubuntu.bash

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+#!/bin/bash
+
+set -e
+
+sudo sed -i 's/Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/ubuntu.sources
+sudo apt-get update
+sudo DEBIAN_FRONTEND=noninteractive apt-get install -y devscripts build-essential
+sudo apt-get build-dep -y gcc-mingw-w64
+
+sudo mkdir -p /usr/src/gcc-mingw-w64-src
+pushd /usr/src/gcc-mingw-w64-src
+sudo apt-get source --download-only gcc-mingw-w64
+popd