Merge branch 'dev' into qemu

diff --cc .github/workflows/dev-short-tests.yml
index 86f2382f7619392b07311ff55689a573a0bb3f10,85c966d36b67f1c377a6ff050ab044f72e874fde..cdc9d7fe3b7c414095b8e8d7ece78d8ed1287c20
--- 1/.github/workflows/dev-short-tests.yml
--- 2/.github/workflows/dev-short-tests.yml
+++ b/.github/workflows/dev-short-tests.yml
@@@ -200,70 -200,18 +200,83 @@@ jobs
          make clean && make -j all MOREFLAGS="-Werror -DZSTD_NO_INLINE -DZSTD_STRIP_ERROR_STRINGS"
          make clean && make check MOREFLAGS="-Werror -DZSTD_NO_INLINE -DZSTD_STRIP_ERROR_STRINGS"
  
 -# No clear reason, as the same test works fine locally and on travisCI.
 +
 +  qemu-consistency:
 +    name: QEMU ${{ matrix.name }}
 +    runs-on: ubuntu-latest
 +    strategy:
 +      fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix failed.
 +      matrix:
 +        include: [
 +          { name: ARM,      xcc_pkg: gcc-arm-linux-gnueabi,     xcc: arm-linux-gnueabi-gcc,     xemu_pkg: qemu-system-arm,    xemu: qemu-arm-static     },
 +          { name: ARM64,    xcc_pkg: gcc-aarch64-linux-gnu,     xcc: aarch64-linux-gnu-gcc,     xemu_pkg: qemu-system-arm,    xemu: qemu-aarch64-static },
 +          { name: PPC,      xcc_pkg: gcc-powerpc-linux-gnu,     xcc: powerpc-linux-gnu-gcc,     xemu_pkg: qemu-system-ppc,    xemu: qemu-ppc-static     },
 +          { name: PPC64LE,  xcc_pkg: gcc-powerpc64le-linux-gnu, xcc: powerpc64le-linux-gnu-gcc, xemu_pkg: qemu-system-ppc,    xemu: qemu-ppc64le-static },
 +          { name: S390X,    xcc_pkg: gcc-s390x-linux-gnu,       xcc: s390x-linux-gnu-gcc,       xemu_pkg: qemu-system-s390x,  xemu: qemu-s390x-static   },
 +          { name: MIPS,     xcc_pkg: gcc-mips-linux-gnu,        xcc: mips-linux-gnu-gcc,        xemu_pkg: qemu-system-mips,   xemu: qemu-mips-static    },
 +          { name: M68K,     xcc_pkg: gcc-m68k-linux-gnu,        xcc: m68k-linux-gnu-gcc,        xemu_pkg: qemu-system-m68k,   xemu: qemu-m68k-static    },
 +        ]
 +    env:                        # Set environment variables
 +      XCC: ${{ matrix.xcc }}
 +      XEMU: ${{ matrix.xemu }}
 +    steps:
 +    - uses: actions/checkout@v2 # https://github.com/actions/checkout
 +    - name: apt update & install
 +      run: |
 +        sudo apt-get update
 +        sudo apt-get install gcc-multilib g++-multilib qemu-utils qemu-user-static
 +        sudo apt-get install ${{ matrix.xcc_pkg }} ${{ matrix.xemu_pkg }}
 +    - name: Environment info
 +      run: |
 +        echo && which $XCC
 +        echo && $XCC --version
 +        echo && $XCC -v  # Show built-in specs
 +        echo && which $XEMU
 +        echo && $XEMU --version
 +    - name: ARM
 +      if: ${{ matrix.name == 'ARM' }}
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +    - name: ARM64
 +      if: ${{ matrix.name == 'ARM64' }}
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +    - name: PPC
 +      if: ${{ matrix.name == 'PPC' }}
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +    - name: PPC64LE
 +      if: ${{ matrix.name == 'PPC64LE' }}
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +    - name: S390X
 +      if: ${{ matrix.name == 'S390X' }}
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +    - name: MIPS
 +      if: ${{ matrix.name == 'MIPS' }}
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +    - name: M68K
 +      if: ${{ matrix.name == 'M68K' }}
 +      continue-on-error: true   # disable reporting errors (alignment issues)
 +      run: |
 +        LDFLAGS="-static" CC=$XCC QEMU_SYS=$XEMU make clean check
 +
 +
+ # This test currently fails on Github Actions specifically.
++# Possible reason : TTY emulation.
++# Note that the same test works fine locally and on travisCI.
+ # This will have to be fixed before transfering the test to GA.
+ #  versions-compatibility:
+ #    runs-on: ubuntu-latest
+ #    steps:
+ #    - uses: actions/checkout@v2
+ #    - name: Versions Compatibility Test
+ #      run: |
+ #        make -C tests versionsTest
+ 
+ 
  # For reference : icc tests
  # icc tests are currently failing on Github Actions, likely to issues during installation stage
  # To be fixed later