ci: Remove Windows tasks from Cirrus CI

.cirrus.yml

@@ -216,68 +216,6 @@ task:
     - ./ci/cirrus.sh
   << : *CAT_LOGS
 
-task:
-  << : *LINUX_CONTAINER
-  env:
-    WRAPPER_CMD: wine
-    WITH_VALGRIND: no
-    ECDH: yes
-    RECOVERY: yes
-    SCHNORRSIG: yes
-    CTIMETESTS: no
-  matrix:
-    - name: "x86_64 (mingw32-w64): Windows (Debian stable, Wine)"
-      env:
-        HOST: x86_64-w64-mingw32
-    - name: "i686 (mingw32-w64): Windows (Debian stable, Wine)"
-      env:
-        HOST: i686-w64-mingw32
-  test_script:
-    - ./ci/cirrus.sh
-  << : *CAT_LOGS
-
-task:
-  << : *LINUX_CONTAINER
-  env:
-    WRAPPER_CMD: wine
-    WERROR_CFLAGS: -WX
-    WITH_VALGRIND: no
-    ECDH: yes
-    RECOVERY: yes
-    EXPERIMENTAL: yes
-    SCHNORRSIG: yes
-    ELLSWIFT: yes
-    CTIMETESTS: no
-    # Use a MinGW-w64 host to tell ./configure we're building for Windows.
-    # This will detect some MinGW-w64 tools but then make will need only
-    # the MSVC tools CC, AR and NM as specified below.
-    HOST: x86_64-w64-mingw32
-    CC: /opt/msvc/bin/x64/cl
-    AR: /opt/msvc/bin/x64/lib
-    NM: /opt/msvc/bin/x64/dumpbin -symbols -headers
-    # Set non-essential options that affect the CLI messages here.
-    # (They depend on the user's taste, so we don't want to set them automatically in configure.ac.)
-    CFLAGS: -nologo -diagnostics:caret
-    LDFLAGS: -Xlinker -Xlinker -Xlinker -nologo
-  matrix:
-    - name: "x86_64 (MSVC): Windows (Debian stable, Wine)"
-    - name: "x86_64 (MSVC): Windows (Debian stable, Wine, int128_struct)"
-      env:
-        WIDEMUL: int128_struct
-    - name: "x86_64 (MSVC): Windows (Debian stable, Wine, int128_struct with __(u)mulh)"
-      env:
-        WIDEMUL: int128_struct
-        CPPFLAGS: -DSECP256K1_MSVC_MULH_TEST_OVERRIDE
-    - name: "i686 (MSVC): Windows (Debian stable, Wine)"
-      env:
-        HOST: i686-w64-mingw32
-        CC: /opt/msvc/bin/x86/cl
-        AR: /opt/msvc/bin/x86/lib
-        NM: /opt/msvc/bin/x86/dumpbin -symbols -headers
-  test_script:
-    - ./ci/cirrus.sh
-  << : *CAT_LOGS
-
 # Sanitizers
 task:
   << : *LINUX_CONTAINER
@@ -370,4 +308,3 @@ task:
   test_script:
     - g++ -Werror include/*.h
     - clang -Werror -x c++-header include/*.h
-    - /opt/msvc/bin/x64/cl.exe -c -WX -TP include/*.h

ci/linux-debian.Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:stable
+FROM debian:stable-slim
 
 SHELL ["/bin/bash", "-c"]
 
@@ -19,9 +19,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
         gcc-s390x-linux-gnu libc6-dev-s390x-cross libc6-dbg:s390x \
         gcc-arm-linux-gnueabihf libc6-dev-armhf-cross libc6-dbg:armhf \
         gcc-aarch64-linux-gnu libc6-dev-arm64-cross libc6-dbg:arm64 \
-        gcc-powerpc64le-linux-gnu libc6-dev-ppc64el-cross libc6-dbg:ppc64el \
-        gcc-mingw-w64-x86-64-win32 wine64 wine \
-        gcc-mingw-w64-i686-win32 wine32
+        gcc-powerpc64le-linux-gnu libc6-dev-ppc64el-cross libc6-dbg:ppc64el
 
 WORKDIR /root
 
@@ -55,20 +53,3 @@ RUN wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | tee /etc/apt/trusted.
     # Create symlinks for them
     ln -s $(ls /usr/bin/clang-?? | sort | tail -1) /usr/bin/clang-snapshot && \
     ln -s $(ls /usr/bin/clang-?? | sort | head -1) /usr/bin/clang
-
-# The "wine" package provides a convenience wrapper that we need
-RUN apt-get update && apt-get install --no-install-recommends -y \
-        git ca-certificates wine64 wine python3-simplejson python3-six msitools winbind procps && \
-# Workaround for `wine` package failure to employ the Debian alternatives system properly.
-    ln -s /usr/lib/wine/wine64 /usr/bin/wine64 && \
-# Set of tools for using MSVC on Linux.
-    git clone https://github.com/mstorsjo/msvc-wine && \
-    mkdir /opt/msvc && \
-    python3 msvc-wine/vsdownload.py --accept-license --dest /opt/msvc Microsoft.VisualStudio.Workload.VCTools && \
-# Since commit 2146cbfaf037e21de56c7157ec40bb6372860f51, the
-# msvc-wine effectively initializes the wine prefix when running
-# the install.sh script.
-    msvc-wine/install.sh /opt/msvc && \
-# Wait until the wineserver process has exited before closing the session,
-# to avoid corrupting the wine prefix.
-    while (ps -A | grep wineserver) > /dev/null; do sleep 1; done