Added binary builds for windows. (#1)

This uses a dedicated build script because of all the slight differences
(config vs CMAKE_BUILD_TYPE, needs zlib). We also trial a new approach where we
just pack up the entire installation directory rather than cpacking each lib
individually, given that the zlib source doesn't support cpack.

Author: LTLA

.github/workflows/build-libraries.yaml

@@ -1,6 +1,7 @@
 name: Build libraries
 
 on:
+  push:
   create:
     tags:
       - '*'
@@ -38,9 +39,30 @@ jobs:
         with:
           path: artifacts/*.tar.gz
 
+  build_windows_x86_64:
+    name: Build Windows (x86_64)
+    runs-on: windows-2019
+    env:
+      ARTIFACT_NAME: windows_x86_64
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Run the build
+        run: |
+            git config --global --add safe.directory $(pwd)
+            ./build_windows.sh
+        shell: bash
+
+      - name: Upload tarballs
+        uses: actions/upload-artifact@v3
+        with:
+          path: installed
+
   publish:
     name: Publish libraries
-    needs: [build_macosx_x86_64]
+    needs: [build_macosx_x86_64, build_windows_x86_64]
     if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
 

build_windows.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -e
+set -u
+
+mkdir installed
+install_dir=$(pwd)/installed
+
+# Setting up ZLIB
+curl https://www.zlib.net/zlib-1.3.tar.gz > bundle.tar.gz
+tar -xf bundle.tar.gz
+rm bundle.tar.gz
+mv zlib-1.3 libz
+
+cd libz
+cmake -S . -B build -DCMAKE_INSTALL_PREFIX=${install_dir}
+cmake --build build --config Release
+cmake --install build
+cd -
+
+# Setting up AEC
+git clone https://gitlab.dkrz.de/k202009/libaec
+cd libaec
+git checkout v1.0.6
+cmake -S . -B build -DCMAKE_INSTALL_PREFIX=${install_dir}
+cmake --build build --config Release
+cmake --install build
+cd -
+
+# Setting up HDF5
+curl -L https://github.com/HDFGroup/hdf5/archive/refs/tags/hdf5-1_12_2.tar.gz > bundle.tar.gz
+tar -xf bundle.tar.gz
+rm bundle.tar.gz
+mv hdf5-hdf5-1_12_2/ libhdf5
+cd libhdf5
+
+cmake -S . -B build \
+  -DBUILD_SHARED_LIBS=ON \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DHDF5_BUILD_EXAMPLES=OFF \
+  -DHDF5_BUILD_TOOLS=OFF \
+  -DHDF5_BUILD_UTILS=OFF \
+  -DHDF5_BUILD_CPP_LIB=ON \
+  -DHDF5_ENABLE_Z_LIB_SUPPORT=ON \
+  -DHDF5_ENABLE_SZIP_SUPPORT=ON \
+  -DBUILD_TESTING=OFF \
+  -DUSE_LIBAEC=ON \
+  -DCMAKE_INSTALL_PREFIX=${install_dir}
+
+cmake --build build --config Release
+cmake --install build
+cd -
+
+