diff --git a/Build_wheels_for_cpython39_x86.yml b/Build_wheels_for_cpython39_x86.yml
new file mode 100644
index 000000000..9d20c280b
--- /dev/null
+++ b/Build_wheels_for_cpython39_x86.yml
@@ -0,0 +1,173 @@
+name: Build wheels for CPython3.9 x86
+
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}-${{ github.event_name }}-${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) && github.sha || '' }}
+  cancel-in-progress: true
+
+jobs:
+  build_wheels:
+    name: Build wheel - ${{ matrix.os.name }}
+    runs-on: ${{ matrix.os.runs-on }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - name: Ubuntu 24+16 i386 CPython 3.9
+            runs-on: ubuntu-latest
+            matrix: linux
+            arch: i386
+            tag_arch: i686
+            release: xenial
+            mirror: http://azure.archive.ubuntu.com/ubuntu
+            version: 1.5.6.3
+            pyver: "3.9"
+            getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
+            pypkg: python3.9
+            pypkgadd: python3.9-distutils
+            pyengine_tag: cp39-cp39
+            libc_tag: manylinux_2_17
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+
+      - name: Update and upgrade Ubuntu 24
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo which apt
+          sudo apt update; 
+          sudo apt purge -y firefox lxd snapd;
+          sudo apt install -y zram-config;
+          sudo apt list --upgradable;
+          sudo apt upgrade -y;
+          sudo apt install -f
+
+      - name: Build source distribution with Ubuntu
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo apt install -y devscripts debootstrap qemu-user;
+          pip install build;
+          python -m build --sdist --outdir dist .
+         
+      - name: Debootstrap Ubuntu ${{matrix.os.release}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo debootstrap --no-merged-usr --verbose --include=sudo,wget,curl,ca-certificates --arch=${{matrix.os.arch}} ${{matrix.os.release}} ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} ${{matrix.os.mirror}} || tail ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/debootstrap/debootstrap.log
+     
+      - name: Update and Upgrade Ubuntu ${{matrix.os.release}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel
+          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/proc -t proc
+          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/dev/pts -t devpts
+          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/sys -t sysfs
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
+          echo " deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
+          sudo find ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} -iname apt
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
+          sudo cp -v ./*.list ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/sources.list.d
+          false && sudo rm -fv ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/trusted.gpg.d/* && sudo rm -fv ./ubuntu-xenial-x86/etc/apt/trusted.gpg
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public.gpg -Orusoft.gpg'
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public-old.gpg -Orusoft-old.gpg'
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A2CE4BCCC50209DD || true'
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt upgrade -y
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt -fy install
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt upgrade -y
+           
+           
+      - name: Pepare dev files
+        if: matrix.os.matrix == 'linux'
+        run: |
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev
+
+      - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkg}} get-pip.py || true"
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools<72.0'" 
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U pkginfo" 
+                      
+           
+      - name: Pepare source and build wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
+          sudo tar -xvf dist/zstd-${{matrix.os.version}}.tar.gz -C ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
+          false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} env 
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} pkg-config libzstd --modversion 
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-${{matrix.os.version}} && ZSTD_ASM=1 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=0 python${{matrix.os.pyver}} setup.py bdist_wheel clean"
+
+      - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-${{matrix.os.version}} && python${{matrix.os.pyver}} setup.py test"
+
+      - name: Pepare wheel for upload
+        if: matrix.os.matrix == 'linux'
+        run: |
+           sudo cp -v ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-${{matrix.os.version}}/dist/* ./dist
+           sudo ls -lh ./dist/* 
+           sudo mv -v ./dist/"zstd-${{matrix.os.version}}-${{matrix.os.pyengine_tag}}-linux_${{matrix.os.tag_arch}}.whl" ./dist/"zstd-${{matrix.os.version}}-${{matrix.os.pyengine_tag}}-${{matrix.os.libc_tag}}_${{matrix.os.tag_arch}}.whl"
+           sudo rm -vf ./dist/*.tar.gz
+      
+            
+#      - name: Upload artifacts
+#        uses: actions/upload-artifact@v4
+#        with:
+#          name: wheels
+#.         path: ./dist
+#          compression-level: 0
+          
+      - name: Test for secrets access
+        id: check_secrets
+        # If a third party makes a pull request
+        # this allows automated steps below to be skipped
+        # and leave a clean PR CI run
+        shell: bash
+        run: |
+          unset HAS_SECRET
+          unset HAS_SECRET_TEST
+          if [ -n "$SECRET" ]; then HAS_SECRET='true' ; fi
+          if [ -n "$SECRET_TEST" ]; then HAS_SECRET_TEST='true' ; fi
+          echo ::set-output name=HAS_SECRET::${HAS_SECRET}
+          echo ::set-output name=HAS_SECRET_TEST::${HAS_SECRET_TEST}
+        env:
+          SECRET: "${{ secrets.pypi_password }}"
+          SECRET_TEST: "${{ secrets.test_pypi_password }}"
+
+      - name: Install twine
+        run: pip install 'twine<=6.0.1'
+
+      - name: Publish distribution to PyPI
+        if: >
+         startsWith(github.event.ref, 'refs/tags') &&
+         steps.check_secrets.outputs.HAS_SECRET
+        env:
+          # If the PR/Push has secret access
+          # and PYPI_PASSWORD is in GH Secrets for this repo
+          # and this is a tag, publish to PyPI
+          TWINE_REPOSITORY_URL: https://upload.pypi.org/legacy/
+          TWINE_USERNAME: "${{ secrets.pypi_username }}"
+          TWINE_NON_INTERACTIVE: 1
+          TWINE_PASSWORD: "${{ secrets.pypi_password }}"
+        run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
+
+      - name: Publish distribution to Test PyPI
+        if: steps.check_secrets.outputs.HAS_SECRET
+        env:
+          # If the PR/Push has secret access
+          # and TEST_PYPI_PASSWORD is in GH Secrets for this repo
+          # then publish each build to test PyPI
+          TWINE_REPOSITORY_URL: https://test.pypi.org/legacy/
+          TWINE_USERNAME: "${{ secrets.test_pypi_username }}"
+          TWINE_NON_INTERACTIVE: 1
+          TWINE_PASSWORD: "${{ secrets.test_pypi_password }}"
+        run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
+        
diff --git a/glibc-check.sh b/glibc-check.sh
new file mode 100644
index 000000000..76b4f540a
--- /dev/null
+++ b/glibc-check.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# This scripts lets you check which minimum GLIBC version an executable requires.
+# Simply run './glibc-check.sh path/to/your/binary'
+#
+# You can set `MAX_VER` however low you want, although I (fasterthanlime)
+# feel like `2.13` is a good target (For reference, Ubuntu 12.04 has GLIBC 2.15)
+MAX_VER=2.13
+
+SCRIPTPATH=$( cd $(dirname $0) ; pwd -P )
+BINARY=$1
+
+# Version comparison function in bash
+vercomp () {
+    if [[ $1 == $2 ]]
+    then
+        return 0
+    fi
+    local IFS=.
+    local i ver1=($1) ver2=($2)
+    # fill empty fields in ver1 with zeros
+    for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
+    do
+        ver1[i]=0
+    done
+    for ((i=0; i<${#ver1[@]}; i++))
+    do
+        if [[ -z ${ver2[i]} ]]
+        then
+            # fill empty fields in ver2 with zeros
+            ver2[i]=0
+        fi
+        if ((10#${ver1[i]} > 10#${ver2[i]}))
+        then
+            return 1
+        fi
+        if ((10#${ver1[i]} < 10#${ver2[i]}))
+        then
+            return 2
+        fi
+    done
+    return 0
+}
+
+IFS="
+"
+VERS=$(objdump -T $BINARY | grep GLIBC | sed 's/.*GLIBC_\([.0-9]*\).*/\1/g' | sort -u)
+
+for VER in $VERS; do
+  vercomp $VER $MAX_VER
+  COMP=$?
+  if [[ $COMP -eq 1 ]]; then
+    echo "Error! ${BINARY} requests GLIBC ${VER}, which is higher than target ${MAX_VER}"
+    echo "Affected symbols:"
+    objdump -T $BINARY | grep GLIBC_${VER}
+    echo "Looking for symbols in libraries..."
+    for LIBRARY in $(ldd $BINARY | cut -d ' ' -f 3); do
+      echo $LIBRARY
+      objdump -T $LIBRARY | fgrep GLIBC_${VER}
+    done
+    exit 27
+  else
+    echo "Found version ${VER}"
+  fi
+done