Add windows build via github Actions

Also fix freebsd to be up to date as it broke CI.

.cirrus.yml

@@ -156,7 +156,7 @@ task:
 task:
   name: freebsd
   freebsd_instance:
-    image_family: freebsd-13-2
+    image_family: freebsd-14-0
 
   pkginstall_script:
     - pkg update -f

.gitattributes

@@ -0,0 +1,4 @@
+# Github's git changes NL for NL-CR on Windows.
+# We pretend everything is binary so any comparisons of test files
+# work.
+tests/* -text

.github/workflows/windows-build.yml

@@ -0,0 +1,43 @@
+name: Windows/MinGW-W64
+#on: [push, pull_request]
+
+on:
+  push:
+    - branches: *
+
+  pull_request:
+    - branches: *
+
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Set up MSYS2 MinGW-W64
+      uses: msys2/setup-msys2@v2
+      with:
+        msystem: mingw64
+        update: false
+        install: >-
+          zlib-devel
+          libbz2-devel
+          liblzma-devel
+          mingw-w64-x86_64-toolchain
+          mingw-w64-x86_64-autotools
+          mingw-w64-x86_64-tools-git
+    - name: Compile htscodecs
+      shell: msys2 {0}
+      run: |
+        export PATH=/mingw64/bin:$PATH
+        export MSYSTEM=MINGW64
+        autoreconf -i
+        ./configure --disable-shared CFLAGS='-g -O3 -D_XOPEN_SOURCE=600  -Wno-char-subscripts'
+        make -j32
+    - name: Check htscodecs
+      shell: msys2 {0}
+      run: |
+        export PATH=/mingw64/bin:$PATH
+        export MSYSTEM=MINGW64
+        make check || cat tests/test-suite.log
+