CI: commit freetds.pc to repo, copy into pkgconfig dir before build

Author: vkuttyp

.github/workflows/swift.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   build:
     name: Build & Test
-    runs-on: macos-14        # Apple Silicon runner, Xcode 15+
+    runs-on: macos-14
 
     steps:
       - name: Checkout
@@ -21,30 +21,13 @@ jobs:
       - name: Install FreeTDS
         run: brew install freetds
 
-      - name: Create freetds.pc for pkg-config
-        # Homebrew's freetds does not ship a .pc file on macOS.
-        # We generate one from the known brew prefix so that SPM's
-        # systemLibrary target can resolve it via pkg-config.
+      - name: Register freetds.pc with pkg-config
+        # Homebrew's freetds doesn't ship a .pc file on macOS.
+        # We ship one in the repo and symlink it into the pkgconfig directory.
         run: |
-          PREFIX=$(brew --prefix freetds)
-          PC_DIR=/opt/homebrew/lib/pkgconfig
-          mkdir -p "$PC_DIR"
-          cat > "$PC_DIR/freetds.pc" << PCEOF
-          prefix=$PREFIX
-          exec_prefix=\${prefix}
-          libdir=\${exec_prefix}/lib
-          includedir=\${prefix}/include
-
-          Name: FreeTDS
-          Description: FreeTDS library
-          Version: 1.0
-          Libs: -L\${libdir} -lsybdb -liconv
-          Cflags: -I\${includedir}
-          PCEOF
-          echo "=== freetds.pc written ==="
-          cat "$PC_DIR/freetds.pc"
-          echo "=== pkg-config verify ==="
-          PKG_CONFIG_PATH="$PC_DIR" pkg-config --cflags --libs freetds
+          mkdir -p /opt/homebrew/lib/pkgconfig
+          cp ci/freetds.pc /opt/homebrew/lib/pkgconfig/freetds.pc
+          pkg-config --cflags --libs freetds
 
       - name: Build
         run: swift build -v

ci/freetds.pc

@@ -0,0 +1,13 @@
+# FreeTDS pkg-config file for macOS (Apple Silicon)
+# Committed to repo because Homebrew's freetds does not ship a .pc file on macOS.
+# Linux users: this file is ignored; FreeTDS is found via system pkg-config.
+prefix=/opt/homebrew/opt/freetds
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: FreeTDS
+Description: FreeTDS library
+Version: 1.0
+Libs: -L${libdir} -lsybdb -liconv
+Cflags: -I${includedir}