Build action.

.github/workflows/build.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -Eeuo pipefail
+
+JVER=3.0.3
+if [ ! -d "libjpeg-turbo-$JVER" ]; then
+  url="https://github.com/libjpeg-turbo/libjpeg-turbo/releases/download/$JVER/libjpeg-turbo-$JVER.tar.gz"
+  curl -#L "$url" | tar xz
+fi
+
+mkdir -p build_arm
+pushd build_arm
+cmake -G"Unix Makefiles" "../libjpeg-turbo-$JVER" \
+  -D"CMAKE_OSX_DEPLOYMENT_TARGET=11" \
+  -D"CMAKE_OSX_ARCHITECTURES=arm64"
+make -j jpeg-static
+cc -O3 -o dcraw ../dcraw.c -DNO_JASPER -DNO_LCMS \
+   -I. -I"../libjpeg-turbo-$JVER" libjpeg.a \
+   --target=arm64-apple-macos11
+popd
+
+mkdir -p build_x86
+pushd build_x86
+cmake -G"Unix Makefiles" "../libjpeg-turbo-$JVER" \
+  -D"CMAKE_OSX_DEPLOYMENT_TARGET=10.13" \
+  -D"CMAKE_OSX_ARCHITECTURES=x86_64"
+make -j jpeg-static
+cc -O3 -o dcraw ../dcraw.c -DNO_JASPER -DNO_LCMS \
+   -I. -I"../libjpeg-turbo-$JVER" libjpeg.a \
+   --target=x86_64-apple-macos10.13
+popd
+
+lipo -create -output dcraw build_arm/dcraw build_x86/dcraw
+
+tar c dcraw | gzip -9 > dcraw.tgz

.github/workflows/dist.yml

@@ -6,8 +6,17 @@ on:
 jobs:
 
   build:
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
 
     steps:
-    - name: Placeholder
-      run: true
+    - uses: actions/checkout@v4
+    - uses: ilammy/setup-nasm@v1
+
+    - name: Build artifact
+      run: .github/workflows/build.sh
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: dcraw-macos.tgz
+        path: dcraw.tgz

.gitignore

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