Fix 3572: macos-15 runner does not support older than Qt 6.9.1

Author: pljones

.github/workflows/autobuild.yml

@@ -250,12 +250,12 @@ jobs:
           - config_name:            iOS (artifacts)
             target_os:              ios
             building_on_os:         macos-15
-            base_command:           QT_VERSION=6.7.3 ./.github/autobuild/ios.sh
+            base_command:           QT_VERSION=6.9.1 ./.github/autobuild/ios.sh
             # Build failed with CodeQL enabled when last tested 03/2022 (#2490).
             # There are no hints that iOS is supposed to be supported by CodeQL.
             # Therefore, disable it:
             run_codeql:             false
-            xcode_version:          16.2.0
+            xcode_version:          16.3.0
 
           - config_name:            Windows (artifact+codeQL)
             target_os:              windows

ios/deploy_ios.sh

@@ -5,7 +5,18 @@ set -eu -o pipefail
 
 # Create Xcode file and build
 qmake -spec macx-xcode Jamulus.pro
-/usr/bin/xcodebuild -project Jamulus.xcodeproj -scheme Jamulus -configuration Release clean archive -archivePath "build/Jamulus.xcarchive" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO CODE_SIGN_ENTITLEMENTS=""
+
+# Workaround: Qt is built for iOS 18.2 but Xcode 16.2.0 only has iOS 18.1 SDK
+# Replace 18.2 references with 18.1 in generated project files
+echo "Patching iOS SDK version references from 18.2 to 18.1..."
+find Jamulus.xcodeproj -type f \( -name "*.pbxproj" -o -name "*.storyboard" \) | while read file; do
+    if grep -q "18\.[2-9]" "$file" 2>/dev/null; then
+        echo "  Patching: $file"
+        sed -i '' 's/18\.[2-9]/18.1/g' "$file"
+    fi
+done
+
+/usr/bin/xcodebuild -project Jamulus.xcodeproj -scheme Jamulus -configuration Release -sdk iphoneos clean archive -archivePath "build/Jamulus.xcarchive" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO CODE_SIGN_ENTITLEMENTS=""
 
 # Generate ipa by copying the .app file from the xcarchive directory
 mkdir build/Payload