Making sure Projucer workflow works with Xcode 15.0 (#137)

* Making sure Projucer workflow works with Xcode 15.0

* CI fiddling

* More xcode/cmake twiddling

* Force CMake OSX deploymnet target for Xcode 15

* Bring back the rest of CI

.github/workflows/build-projucer.yml

@@ -26,6 +26,13 @@ jobs:
           - os: macos-latest
             jucer: build/_deps/juce-src/extras/Projucer/Builds/MacOSX/build/Debug/Projucer.app/Contents/MacOS/Projucer
             clap_gen: "Xcode"
+            xcode_version: latest-stable
+            juce_version: "7.0.6"
+            cxx_standard: 17
+          - os: macos-13
+            jucer: build/_deps/juce-src/extras/Projucer/Builds/MacOSX/build/Debug/Projucer.app/Contents/MacOS/Projucer
+            clap_gen: "Xcode"
+            xcode_version: "15.0"
             juce_version: "7.0.6"
             cxx_standard: 17
           - os: windows-2022
@@ -51,7 +58,7 @@ jobs:
         if: runner.os == 'MacOS'
         uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: latest-stable
+          xcode-version: ${{ matrix.xcode_version }}
 
       - name: Checkout code
         uses: actions/checkout@v2

CMakeLists.txt

@@ -35,6 +35,17 @@ endif()
 message( STATUS "Building CLAP with CLAP_CXX_STANDARD=${CLAP_CXX_STANDARD}")
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+if(CMAKE_GENERATOR STREQUAL Xcode)
+    # Funky work around for Xcode 15, see: https://forum.juce.com/t/vst-au-builds-fail-after-upgrading-to-xcode-15/57936/43
+    message(STATUS "Configuring CJE with Xcode version ${XCODE_VERSION}")
+    if((${XCODE_VERSION} STREQUAL "15.0") OR (${XCODE_VERSION} STREQUAL "15.0.1"))
+        message(STATUS "Enabling Xcode 15 linker workaround!")
+        add_link_options("-Wl,-ld_classic")
+        add_compile_definitions(JUCE_SILENCE_XCODE_15_LINKER_WARNING=1)
+        set(CMAKE_OSX_DEPLOYMENT_TARGET "10.13" CACHE STRING "Minimum OS X deployment target" FORCE)
+    endif()
+endif()
+
 option(CLAP_JUCE_EXTENSIONS_BUILD_EXAMPLES "Add targets for building and running clap-juce-extensions examples" ${is_toplevel})
 if(CLAP_JUCE_EXTENSIONS_BUILD_EXAMPLES)
     # The examples need JUCE to be imported before the CLAP helper targets