Commit b63058b for zlib

commit b63058bc2d15d319aa3a6abdb41a3c90c1402bae
Author: Vollstrecker <werner@vollstreckernet.de>
Date:   Wed Dec 24 16:32:08 2025 +0100

    Fix MinGW clang workflow to use clang.

diff --git a/.github/workflows/msys-cygwin.yml b/.github/workflows/msys-cygwin.yml
index e76be9f..f2a4a74 100644
--- a/.github/workflows/msys-cygwin.yml
+++ b/.github/workflows/msys-cygwin.yml
@@ -29,6 +29,7 @@ jobs:
           toolchain:p
           cmake:p
     - name: Configure
+      if: matrix.sys != 'clang64'
       run: |
         cmake -G"Unix Makefiles" \
           -S . \
@@ -36,6 +37,15 @@ jobs:
           -DCMAKE_VERBOSE_MAKEFILE=ON \
           -DCMAKE_BUILD_TYPE=Release \
           -DMINIZIP_ENABLE_BZIP2=ON
+    - name: Configure clang64
+      if: matrix.sys == 'clang64'
+      run: |
+        CC=clang cmake -G"Unix Makefiles" \
+          -S . \
+          -B build \
+          -DCMAKE_VERBOSE_MAKEFILE=ON \
+          -DCMAKE_BUILD_TYPE=Release \
+          -DMINIZIP_ENABLE_BZIP2=ON
     - name: Build
       run: cmake --build build --config Release
     - name: Run tests