Build action.

.github/workflows/dist.yml

@@ -6,8 +6,16 @@ on:
 jobs:
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: windows-latest
 
     steps:
-    - name: Placeholder
-      run: true
+    - uses: actions/checkout@v4
+
+    - name: Build artifact
+      run: ./build.sh
+      shell: bash
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v3
+      with:
+        path: dcraw-windows.zip

.gitignore

@@ -0,0 +1,2 @@
+build*/
+libjpeg-turbo*/

build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -Eeuo pipefail
+
+JVER=3.0.1
+if [ ! -d "libjpeg-turbo-$JVER" ]; then
+  url="https://downloads.sourceforge.net/project/libjpeg-turbo/$JVER/libjpeg-turbo-$JVER-gcc64.exe"
+  mkdir "libjpeg-turbo-$JVER"
+  pushd "libjpeg-turbo-$JVER"
+  curl -sL "$url" > archive.7z
+  7z x archive.7z
+  popd
+fi
+
+gcc -O3 -o dcraw.exe dcraw.c -lws2_32 -DNO_JASPER -DNO_LCMS \
+    -I"libjpeg-turbo-$JVER/include" "libjpeg-turbo-$JVER/lib/libjpeg.dll.a"
+
+cp "libjpeg-turbo-$JVER/bin/libjpeg-62.dll" .
+
+7z a -mx9 dcraw-windows.zip dcraw.exe libjpeg-62.dll