Updates on dropping Apple frameworks not available on iOS?

[yorickreum]

Any updates on dropping the requirement for the Carbon framework?

It's mentioned as a fix me in CMakeLists.txt:

  # !!! FIXME: we need Carbon for some very old API calls in
  # !!! FIXME:  src/video/cocoa/SDL_cocoakeyboard.c, but we should figure out
  # !!! FIXME:  how to dump those.
  if(MACOS)
    set(SDL_FRAMEWORK_COCOA 1)
    set(SDL_FRAMEWORK_CARBON 1)
    set(SDL_FRAMEWORK_UTTYPES 1)

It's bugging me currently because the framework requirements basically break the cross-compiling of XCSoar for iOS, seeing [quite](ld: framework 'Cocoa' not found) because of it...

[icculus]

So I asked an Apple engineer about this a few months ago, and their attitude appears to be that there are pieces of Carbon that are useful and have no replacement, so it isn't going anywhere even on the latest architectures, and is still used heavily even inside Apple, even though we aren't really using it for compatibility with MacOS Classic anymore.

That being said, if you can't cross-compile SDL because it's setting up a linker flag based on the host (not target) platform, we should fix that. CC'ing @madebr in case that's a thing we can reasonably fix.

[yorickreum]

Thanks for the prompt response! In my understanding, Carbon and Cocoa are not directly available on iOS (there they are basically contained in UIKit, Foundation, and CoreGraphics instead). Is it possible to just depend on those?

Fixing the linker flag to correctly represent the target instead of the host would also do the trick for me, I believe.

[icculus]

Yeah, these shouldn't be using Cocoa (just UIKit) on iOS. Madebr will likely have fixes or advice when he next comes through here.

[yorickreum]

Okay! Thanks a lot. Maybe the struggle is also related to the other flags XCSoar is setting, those are specified here: https://github.com/XCSoar/XCSoar/blob/3c0c10c16788ce8f7087d55d857e62a5effa3f00/build/python/build/libs.py#L413C1-L453C2

[madebr]

Only thing SDL3's CMake does is add -framework Carbon. For what configurations is the framework not available? I have not seen a build failure, yet. I just added ios and tvos CMake builds in b9ad5fc58 and it's green :heavy_check_mark:.

I see a <Carbon/Carbon.h> include in src/video/cocoa/SDL_cocoakeyboard.m. SDL_build_config_macos.h defines SDL_VIDEO_DRIVER_COCOA unconditionally).

That being said, if you can't cross-compile SDL because it's setting up a linker flag based on the host (not target) platform, we should fix that. CC'ing @madebr in case that's a thing we can reasonably fix.

What flag is detected wrong on your system? How do you configure SDL for cross building?

Ideally, you should only need to add -DCMAKE_SYSTEM_NAME="iOS" -DCMAKE_OSX_ARCHITECTURES="arm64" for ios. Add e.g. -DCMAKE_OSX_SYSROOT="$(xcodebuild -version -sdk iphoneos Path)" to use an explicit sysroot.

[yorickreum]

Thank you too, @madebr, for the quick reply! Very much appreciated.

Some more details: XCSoar is using SDL2, version 2.30.0 currently. This is the build configuration ['cmake', '/Users/yorickreum/Coding/XCSoar/output/src/SDL2-2.30.0', '-DCMAKE_INSTALL_PREFIX=/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin', '-DCMAKE_BUILD_TYPE=release', '-GNinja', '-DBUILD_SHARED_LIBS=OFF', '-DSDL_TEST=OFF', '-DSDL_RENDER=OFF', '-DSDL_JOYSTICK=OFF', '-DSDL_HAPTIC=OFF', '-DSDL_HIDAPI=OFF', '-DSDL_POWER=OFF', '-DSDL_TIMERS=OFF', '-DSDL_FILE=OFF', '-DSDL_LOADSO=OFF', '-DSDL_CPUINFO=OFF', '-DSDL_FILESYSTEM=OFF', '-DSDL_SENSOR=OFF', '-DSDL_LOCALE=OFF', '-DSDL_MISC=OFF', '-DSDL2_DISABLE_SDL2MAIN=OFF', '-DSDL_DISKAUDIO=OFF', '-DSDL_DUMMYAUDIO=OFF', '-DSDL_DUMMYVIDEO=OFF', '-DSDL_OPENGL=OFF', '-DSDL_OPENGLES=ON', '-DSDL_OSS=OFF', '-DSDL_JACK=OFF', '-DSDL_ESD=OFF', '-DSDL_ARTS=OFF', '-DSDL_NAS=OFF', '-DSDL_SNDIO=OFF', '-DSDL_LIBSAMPLERATE=OFF', '-DSDL_COCOA=OFF', '-DSDL_METAL=OFF', '-DCMAKE_SYSTEM_NAME=iOS', '-DCMAKE_OSX_ARCHITECTURES=arm64', '-DCMAKE_TOOLCHAIN_FILE=/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/build/SDL2-2.30.0/cmake_toolchain_file']. resulting in the following configuration:

-- SDL2 was configured with the following options:
-- 
-- Platform: Darwin
-- 64-bit:   TRUE
-- Compiler: /usr/bin/clang
-- Revision: SDL-release-2.30.0-0-g859844eae
-- 
-- Subsystems:
--   Atomic:    ON
--   Audio: ON
--   Video: ON
--   Render:    OFF
--   Events:    ON
--   Joystick:  OFF
--   Haptic:    OFF
--   Hidapi:    OFF
--   Power: OFF
--   Threads:   ON
--   Timers:    OFF
--   File:  OFF
--   Loadso:    OFF
--   CPUinfo:   OFF
--   Filesystem:    OFF
--   Sensor:    OFF
--   Locale:    OFF
--   Misc:  OFF
-- 
-- Options:
--   SDL2_DISABLE_INSTALL        (Wanted: OFF): OFF
--   SDL2_DISABLE_SDL2MAIN       (Wanted: OFF): OFF
--   SDL2_DISABLE_UNINSTALL      (Wanted: OFF): OFF
--   SDL_3DNOW                   (Wanted: OFF): OFF
--   SDL_ALSA                    (Wanted: OFF): OFF
--   SDL_ALSA_SHARED             (Wanted: OFF): OFF
--   SDL_ALTIVEC                 (Wanted: ON): OFF
--   SDL_ARMNEON                 (Wanted: OFF): OFF
--   SDL_ARMSIMD                 (Wanted: OFF): OFF
--   SDL_ARTS                    (Wanted: OFF): OFF
--   SDL_ARTS_SHARED             (Wanted: OFF): OFF
--   SDL_ASAN                    (Wanted: OFF): OFF
--   SDL_ASSEMBLY                (Wanted: ON): ON
--   SDL_ASSERTIONS              (Wanted: auto): auto
--   SDL_BACKGROUNDING_SIGNAL    (Wanted: OFF): OFF
--   SDL_CCACHE                  (Wanted: ON): ON
--   SDL_CLOCK_GETTIME           (Wanted: OFF): OFF
--   SDL_COCOA                   (Wanted: OFF): OFF
--   SDL_DBUS                    (Wanted: OFF): OFF
--   SDL_DIRECTFB                (Wanted: OFF): OFF
--   SDL_DIRECTFB_SHARED         (Wanted: OFF): OFF
--   SDL_DIRECTX                 (Wanted: OFF): OFF
--   SDL_DISKAUDIO               (Wanted: OFF): OFF
--   SDL_DUMMYAUDIO              (Wanted: OFF): OFF
--   SDL_DUMMYVIDEO              (Wanted: OFF): OFF
--   SDL_ESD                     (Wanted: OFF): OFF
--   SDL_ESD_SHARED              (Wanted: OFF): OFF
--   SDL_FOREGROUNDING_SIGNAL    (Wanted: OFF): OFF
--   SDL_FUSIONSOUND             (Wanted: OFF): OFF
--   SDL_FUSIONSOUND_SHARED      (Wanted: OFF): OFF
--   SDL_GCC_ATOMICS             (Wanted: ON): ON
--   SDL_HIDAPI                  (Wanted: OFF): OFF
--   SDL_HIDAPI_JOYSTICK         (Wanted: OFF): OFF
--   SDL_HIDAPI_LIBUSB           (Wanted: OFF): OFF
--   SDL_IBUS                    (Wanted: OFF): OFF
--   SDL_INSTALL_TESTS           (Wanted: OFF): OFF
--   SDL_JACK                    (Wanted: OFF): OFF
--   SDL_JACK_SHARED             (Wanted: OFF): OFF
--   SDL_KMSDRM                  (Wanted: OFF): OFF
--   SDL_KMSDRM_SHARED           (Wanted: OFF): OFF
--   SDL_LASX                    (Wanted: OFF): OFF
--   SDL_LIBC                    (Wanted: ON): ON
--   SDL_LIBICONV                (Wanted: OFF): ON
--   SDL_LIBSAMPLERATE           (Wanted: OFF): OFF
--   SDL_LIBSAMPLERATE_SHARED    (Wanted: OFF): OFF
--   SDL_LIBUDEV                 (Wanted: ON): OFF
--   SDL_LSX                     (Wanted: OFF): OFF
--   SDL_METAL                   (Wanted: OFF): OFF
--   SDL_MMX                     (Wanted: OFF): OFF
--   SDL_NAS                     (Wanted: OFF): OFF
--   SDL_NAS_SHARED              (Wanted: OFF): OFF
--   SDL_OFFSCREEN               (Wanted: ON): ON
--   SDL_OPENGL                  (Wanted: OFF): OFF
--   SDL_OPENGLES                (Wanted: ON): ON
--   SDL_OSS                     (Wanted: OFF): OFF
--   SDL_PIPEWIRE                (Wanted: OFF): OFF
--   SDL_PIPEWIRE_SHARED         (Wanted: OFF): OFF
--   SDL_PTHREADS                (Wanted: ON): ON
--   SDL_PTHREADS_SEM            (Wanted: ON): ON
--   SDL_PULSEAUDIO              (Wanted: OFF): OFF
--   SDL_PULSEAUDIO_SHARED       (Wanted: OFF): OFF
--   SDL_RENDER_D3D              (Wanted: OFF): OFF
--   SDL_RENDER_METAL            (Wanted: ON): ON
--   SDL_RPATH                   (Wanted: OFF): OFF
--   SDL_RPI                     (Wanted: OFF): OFF
--   SDL_SNDIO                   (Wanted: OFF): OFF
--   SDL_SNDIO_SHARED            (Wanted: OFF): OFF
--   SDL_SSE                     (Wanted: OFF): OFF
--   SDL_SSE2                    (Wanted: OFF): OFF
--   SDL_SSE3                    (Wanted: OFF): OFF
--   SDL_SSEMATH                 (Wanted: OFF): OFF
--   SDL_STATIC_PIC              (Wanted: OFF): OFF
--   SDL_SYSTEM_ICONV            (Wanted: ON): ON
--   SDL_TESTS                   (Wanted: OFF): OFF
--   SDL_VENDOR_INFO             (Wanted: ): OFF
--   SDL_VIRTUAL_JOYSTICK        (Wanted: OFF): OFF
--   SDL_VIVANTE                 (Wanted: OFF): OFF
--   SDL_VULKAN                  (Wanted: ON): OFF
--   SDL_WASAPI                  (Wanted: OFF): OFF
--   SDL_WAYLAND                 (Wanted: OFF): OFF
--   SDL_WAYLAND_LIBDECOR        (Wanted: OFF): OFF
--   SDL_WAYLAND_LIBDECOR_SHARED (Wanted: OFF): OFF
--   SDL_WAYLAND_QT_TOUCH        (Wanted: OFF): OFF
--   SDL_WAYLAND_SHARED          (Wanted: OFF): OFF
--   SDL_X11                     (Wanted: OFF): OFF
--   SDL_X11_SHARED              (Wanted: OFF): OFF
--   SDL_X11_XCURSOR             (Wanted: OFF): OFF
--   SDL_X11_XDBE                (Wanted: OFF): OFF
--   SDL_X11_XFIXES              (Wanted: OFF): OFF
--   SDL_X11_XINPUT              (Wanted: OFF): OFF
--   SDL_X11_XRANDR              (Wanted: OFF): OFF
--   SDL_X11_XSCRNSAVER          (Wanted: OFF): OFF
--   SDL_X11_XSHAPE              (Wanted: OFF): OFF
--   SDL_XINPUT                  (Wanted: OFF): OFF
-- 
--  CFLAGS:        -Os -g -ffunction-sections -fdata-sections -fvisibility=hidden -miphoneos-version-min=10.0 -arch arm64 -target aarch64-apple-darwin -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk -isystem /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/include -DNDEBUG -I./output/IOS64/include -DHAVE_POSIX -DHAVE_VASPRINTF -isystem ./output/IOS64/lib/aarch64-apple-darwin/include -DEYE_CANDY -DXCSOAR_TESTING -isystem /include -idirafter "/Users/yorickreum/Coding/XCSoar/output/src/SDL2-2.30.0/src/video/khronos"
--  EXTRA_CFLAGS:   -Wall -Wundef -fno-strict-aliasing -Wdocumentation -Wdocumentation-unknown-command -fcomment-block-commands=threadsafety -fcomment-block-commands=deprecated -Wdeclaration-after-statement -fvisibility=hidden -Wshadow -Wno-unused-local-typedefs -D_THREAD_SAFE
--  EXTRA_LDFLAGS: -Wl,-framework,CoreVideo;-Wl,-framework,Cocoa;-Wl,-framework,Carbon;-Wl,-framework,CoreAudio;-Wl,-framework,AudioToolbox;-Wl,-framework,AVFoundation;-Wl,-framework,Foundation;-Wl,-weak_framework,Metal;-Wl,-weak_framework,QuartzCore -Wl,-compatibility_version,3001.0.0;-Wl,-current_version,3001.0.0
--  EXTRA_LIBS:    m;iconv
-- 
--  Build Shared Library: OFF
--  Build Static Library: ON
--  Build Static Library with Position Independent Code: OFF

Note that EXTRA_LDFLAGS contains -Wl,-framework,Cocoa;-Wl,-framework,Carbon;, altough '-DCMAKE_SYSTEM_NAME=iOS', '-DCMAKE_OSX_ARCHITECTURES=arm64' was specified.

Building and installing actually seems to succeed without any major hickups.

Only, further downstream in the linking of XCSoar we encounter the following error, the command clang++ -O0 -g -L./output/IOS64/lib/aarch64-apple-darwin/lib -stdlib=libc++ -miphoneos-version-min=10.0 -arch arm64 -target aarch64-apple-darwin -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk -o output/IOS64/bin/xcsoar output/IOS64/dbg/src/io/MapFile.o output/IOS64/dbg/src/io/ConfiguredFile.o output/IOS64/dbg/src/io/DataFile.o output/IOS64/dbg/src/Airspace/ProtectedAirspaceWarningManager.o output/IOS64/dbg/src/Airspace/ActivePredicate.o output/IOS64/dbg/src/Task/DefaultTask.o output/IOS64/dbg/src/Task/MapTaskManager.o output/IOS64/dbg/src/Task/ProtectedTaskManager.o output/IOS64/dbg/src/Task/FileProtectedTaskManager.o output/IOS64/dbg/src/Task/RoutePlannerGlue.o output/IOS64/dbg/src/Task/ProtectedRoutePlanner.o output/IOS64/dbg/src/Task/TaskStore.o output/IOS64/dbg/src/Task/TypeStrings.o output/IOS64/dbg/src/Task/ValidationErrorStrings.o output/IOS64/dbg/src/RadioFrequency.o output/IOS64/dbg/src/TransponderCode.o output/IOS64/dbg/src/Engine/Navigation/TraceHistory.o output/IOS64/dbg/src/Engine/Navigation/Aircraft.o output/IOS64/dbg/src/Engine/Trace/Point.o output/IOS64/dbg/src/Engine/Trace/Trace.o output/IOS64/dbg/src/Engine/Trace/Vector.o output/IOS64/dbg/src/Engine/Util/Gradient.o output/IOS64/dbg/src/Engine/ThermalBand/ThermalBand.o output/IOS64/dbg/src/Engine/ThermalBand/ThermalSlice.o output/IOS64/dbg/src/Engine/ThermalBand/ThermalEncounterBand.o output/IOS64/dbg/src/Engine/ThermalBand/ThermalEncounterCollection.o output/IOS64/dbg/src/HorizonWidget.o output/IOS64/dbg/src/Renderer/TextRowRenderer.o output/IOS64/dbg/src/Renderer/TwoTextRowsRenderer.o output/IOS64/dbg/src/Renderer/HorizonRenderer.o output/IOS64/dbg/src/Renderer/GradientRenderer.o output/IOS64/dbg/src/Renderer/GlassRenderer.o output/IOS64/dbg/src/Renderer/TransparentRendererCache.o output/IOS64/dbg/src/Renderer/LabelBlock.o output/IOS64/dbg/src/Renderer/TextInBox.o output/IOS64/dbg/src/Renderer/TraceHistoryRenderer.o output/IOS64/dbg/src/Renderer/ThermalBandRenderer.o output/IOS64/dbg/src/Renderer/TaskProgressRenderer.o output/IOS64/dbg/src/Renderer/ClimbPercentRenderer.o output/IOS64/dbg/src/Renderer/RadarRenderer.o output/IOS64/dbg/src/Airspace/AirspaceGlue.o output/IOS64/dbg/src/Airspace/AirspaceParser.o output/IOS64/dbg/src/Airspace/AirspaceVisibility.o output/IOS64/dbg/src/Airspace/AirspaceComputerSettings.o output/IOS64/dbg/src/Airspace/NearestAirspace.o output/IOS64/dbg/src/Renderer/AirspaceRendererSettings.o output/IOS64/dbg/src/Renderer/GeoBitmapRenderer.o output/IOS64/dbg/src/Operation/PopupOperationEnvironment.o output/IOS64/dbg/src/Operation/MessageOperationEnvironment.o output/IOS64/dbg/src/Operation/VerboseOperationEnvironment.o output/IOS64/dbg/src/Atmosphere/Pressure.o output/IOS64/dbg/src/Atmosphere/AirDensity.o output/IOS64/dbg/src/Atmosphere/CuSonde.o output/IOS64/dbg/src/net/client/WeGlide/UploadIGCFile.o output/IOS64/dbg/src/Plane/PlaneGlue.o output/IOS64/dbg/src/Plane/PlaneFileGlue.o output/IOS64/dbg/src/FLARM/Id.o output/IOS64/dbg/src/FLARM/Error.o output/IOS64/dbg/src/FLARM/List.o output/IOS64/dbg/src/FLARM/FlarmNetRecord.o output/IOS64/dbg/src/FLARM/FlarmNetDatabase.o output/IOS64/dbg/src/FLARM/FlarmNetReader.o output/IOS64/dbg/src/FLARM/Traffic.o output/IOS64/dbg/src/FLARM/Calculations.o output/IOS64/dbg/src/FLARM/Friends.o output/IOS64/dbg/src/FLARM/Computer.o output/IOS64/dbg/src/FLARM/Global.o output/IOS64/dbg/src/FLARM/Glue.o output/IOS64/dbg/src/BallastDumpManager.o output/IOS64/dbg/src/Logger/Settings.o output/IOS64/dbg/src/Logger/Logger.o output/IOS64/dbg/src/Logger/LoggerFRecord.o output/IOS64/dbg/src/Logger/GRecord.o output/IOS64/dbg/src/Logger/LoggerEPE.o output/IOS64/dbg/src/Logger/LoggerImpl.o output/IOS64/dbg/src/IGC/IGCFix.o output/IOS64/dbg/src/IGC/IGCWriter.o output/IOS64/dbg/src/IGC/IGCString.o output/IOS64/dbg/src/IGC/Generator.o output/IOS64/dbg/src/util/MD5.o output/IOS64/dbg/src/Logger/NMEALogger.o output/IOS64/dbg/src/Logger/ExternalLogger.o output/IOS64/dbg/src/Logger/FlightLogger.o output/IOS64/dbg/src/Logger/GlueFlightLogger.o output/IOS64/dbg/src/Replay/Replay.o output/IOS64/dbg/src/IGC/IGCParser.o output/IOS64/dbg/src/Replay/IgcReplay.o output/IOS64/dbg/src/Replay/NmeaReplay.o output/IOS64/dbg/src/Replay/DemoReplay.o output/IOS64/dbg/src/Replay/DemoReplayGlue.o output/IOS64/dbg/src/Replay/TaskAutoPilot.o output/IOS64/dbg/src/Replay/AircraftSim.o output/IOS64/dbg/src/TeamCode/TeamCode.o output/IOS64/dbg/src/TeamCode/Settings.o output/IOS64/dbg/src/TeamActions.o output/IOS64/dbg/src/Waypoint/WaypointList.o output/IOS64/dbg/src/Waypoint/WaypointListBuilder.o output/IOS64/dbg/src/Waypoint/WaypointFilter.o output/IOS64/dbg/src/Waypoint/WaypointGlue.o output/IOS64/dbg/src/Waypoint/SaveGlue.o output/IOS64/dbg/src/Waypoint/LastUsed.o output/IOS64/dbg/src/Waypoint/HomeGlue.o output/IOS64/dbg/src/Waypoint/CupWriter.o output/IOS64/dbg/src/Waypoint/Factory.o output/IOS64/dbg/src/CrossSection/AirspaceXSRenderer.o output/IOS64/dbg/src/CrossSection/TerrainXSRenderer.o output/IOS64/dbg/src/CrossSection/CrossSectionRenderer.o output/IOS64/dbg/src/CrossSection/CrossSectionWindow.o output/IOS64/dbg/src/CrossSection/CrossSectionWidget.o output/IOS64/dbg/src/Gauge/ThermalAssistantRenderer.o output/IOS64/dbg/src/Gauge/ThermalAssistantWindow.o output/IOS64/dbg/src/Gauge/BigThermalAssistantWindow.o output/IOS64/dbg/src/Gauge/BigThermalAssistantWidget.o output/IOS64/dbg/src/Gauge/FlarmTrafficWindow.o output/IOS64/dbg/src/Gauge/BigTrafficWidget.o output/IOS64/dbg/src/Gauge/GaugeFLARM.o output/IOS64/dbg/src/Gauge/GaugeThermalAssistant.o output/IOS64/dbg/src/Gauge/VarioSettings.o output/IOS64/dbg/src/Gauge/TrafficSettings.o output/IOS64/dbg/src/Gauge/GaugeVario.o output/IOS64/dbg/src/Gauge/GlueGaugeVario.o output/IOS64/dbg/src/Gauge/TaskView.o output/IOS64/dbg/src/Gauge/LogoView.o output/IOS64/dbg/src/Waypoint/WaypointDetailsReader.o output/IOS64/dbg/src/Menu/MenuData.o output/IOS64/dbg/src/Menu/MenuBar.o output/IOS64/dbg/src/Menu/Glue.o output/IOS64/dbg/src/Menu/ButtonLabel.o output/IOS64/dbg/src/Menu/ExpandMacros.o output/IOS64/dbg/src/Menu/ShowMenuButton.o output/IOS64/dbg/src/Pan.o output/IOS64/dbg/src/Input/InputConfig.o output/IOS64/dbg/src/Input/InputDefaults.o output/IOS64/dbg/src/Input/InputEvents.o output/IOS64/dbg/src/Input/InputEventsActions.o output/IOS64/dbg/src/Input/InputEventsDevice.o output/IOS64/dbg/src/Input/InputEventsVega.o output/IOS64/dbg/src/Input/InputEventsMap.o output/IOS64/dbg/src/Input/InputEventsPage.o output/IOS64/dbg/src/Input/InputEventsAirspace.o output/IOS64/dbg/src/Input/InputEventsTask.o output/IOS64/dbg/src/Input/InputEventsSettings.o output/IOS64/dbg/src/Input/InputEventsThermalAssistant.o output/IOS64/dbg/src/Input/InputEventsTraffic.o output/IOS64/dbg/src/Input/InputEventsLua.o output/IOS64/dbg/src/Input/InputQueue.o output/IOS64/dbg/src/Input/InputLookup.o output/IOS64/dbg/src/Input/InputKeys.o output/IOS64/dbg/src/Input/InputParser.o output/IOS64/dbg/src/Input/TaskEventObserver.o output/IOS64/dbg/src/PageSettings.o output/IOS64/dbg/src/PageState.o output/IOS64/dbg/src/PageActions.o output/IOS64/dbg/src/StatusMessage.o output/IOS64/dbg/src/PopupMessage.o output/IOS64/dbg/src/Message.o output/IOS64/dbg/src/LogFile.o output/IOS64/dbg/src/Geo/Geoid.o output/IOS64/dbg/src/Projection/Projection.o output/IOS64/dbg/src/Projection/WindowProjection.o output/IOS64/dbg/src/Projection/CompareProjection.o output/IOS64/dbg/src/Renderer/ChartRenderer.o output/IOS64/dbg/src/Renderer/BackgroundRenderer.o output/IOS64/dbg/src/Renderer/FAITriangleAreaRenderer.o output/IOS64/dbg/src/Renderer/OZRenderer.o output/IOS64/dbg/src/Renderer/TaskPointRenderer.o output/IOS64/dbg/src/Renderer/TaskRenderer.o output/IOS64/dbg/src/Renderer/AircraftRenderer.o output/IOS64/dbg/src/Renderer/AirspaceRenderer.o output/IOS64/dbg/src/Renderer/AirspaceRendererGL.o output/IOS64/dbg/src/Renderer/AirspaceRendererOther.o output/IOS64/dbg/src/Renderer/AirspaceLabelList.o output/IOS64/dbg/src/Renderer/AirspaceLabelRenderer.o output/IOS64/dbg/src/Renderer/AirspaceListRenderer.o output/IOS64/dbg/src/Renderer/AirspacePreviewRenderer.o output/IOS64/dbg/src/Renderer/BestCruiseArrowRenderer.o output/IOS64/dbg/src/Renderer/CompassRenderer.o output/IOS64/dbg/src/Renderer/FinalGlideBarRenderer.o output/IOS64/dbg/src/Renderer/VarioBarRenderer.o output/IOS64/dbg/src/Renderer/MapItemListRenderer.o output/IOS64/dbg/src/Renderer/OZPreviewRenderer.o output/IOS64/dbg/src/Renderer/TrackLineRenderer.o output/IOS64/dbg/src/Renderer/TrafficRenderer.o output/IOS64/dbg/src/Renderer/TrailRenderer.o output/IOS64/dbg/src/Renderer/UnitSymbolRenderer.o output/IOS64/dbg/src/Renderer/WaypointListRenderer.o 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output/IOS64/dbg/jasper.a output/IOS64/dbg/libtopo.a output/IOS64/dbg/shapelib.a output/IOS64/dbg/libwidget.a output/IOS64/dbg/form.a output/IOS64/dbg/datafield.a output/IOS64/dbg/liblook.a output/IOS64/dbg/libaudio.a output/IOS64/dbg/screen.a output/IOS64/dbg/libevent.a output/IOS64/dbg/libresource.a output/IOS64/dbg/resources.a output/IOS64/dbg/libdata.a output/IOS64/dbg/driver.a output/IOS64/dbg/port.a output/IOS64/dbg/libcomputer.a output/IOS64/dbg/libnmea.a output/IOS64/dbg/libcoroutines.a output/IOS64/dbg/async.a output/IOS64/dbg/libwaypointfile.a output/IOS64/dbg/libunits.a output/IOS64/dbg/libtaskfile.a output/IOS64/dbg/libtask.a output/IOS64/dbg/libxml.a output/IOS64/dbg/io.a output/IOS64/dbg/libcupfile.a output/IOS64/dbg/libcontest.a output/IOS64/dbg/libroute.a output/IOS64/dbg/libglide.a output/IOS64/dbg/libwaypoint.a output/IOS64/dbg/libairspace.a output/IOS64/dbg/liblua.a output/IOS64/dbg/zzip.a output/IOS64/dbg/liboperation.a output/IOS64/dbg/libclient.a output/IOS64/dbg/libhttp.a output/IOS64/dbg/json.a output/IOS64/dbg/libnet.a output/IOS64/dbg/fmt.a output/IOS64/dbg/time.a output/IOS64/dbg/libos.a output/IOS64/dbg/libthread.a output/IOS64/dbg/util.a output/IOS64/dbg/libgeo.a output/IOS64/dbg/math.a -framework CoreLocation -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -lSDL2 -Wl,-framework,CoreVideo -Wl,-framework,Cocoa -Wl,-framework,Carbon -Wl,-framework,CoreAudio -Wl,-framework,AudioToolbox -Wl,-framework,AVFoundation -Wl,-framework,Foundation -Wl,-weak_framework,Metal -Wl,-weak_framework,QuartzCore -lm -liconv -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -ltiff -lm -lz -lgeotiff -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -lproj -lm -ldl -lsqlite3 -lz -framework CoreGraphics -framework OpenGLES -framework UiKit -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -lcares -lresolv -llua -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -lsodium -lpthread -Qunused-arguments -pthread -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -lcurl -lcares -lresolv /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib/libssl.a /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib/libcrypto.a /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib/libz.a -lcares -lresolv /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib/libssl.a /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib/libcrypto.a /Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib/libz.a -lz -L/Users/yorickreum/Coding/XCSoar/output/IOS64/lib/aarch64-apple-darwin/lib -lfmt -lpthread -framework Foundation -framework UIKit results in

ld: framework 'Cocoa' not found
clang: error: linker command failed with exit code 1 (use -v to see invocation)

So, during linking with the ios sdk as isysroot, it cannot find the Cocoa framework. Now I was wondering where this -Wl,-framework,Cocoa linker flag actually came from ... and upon searching through all the codebase and the libraries, the only cause I could find was that libsdl v2 is setting it in EXTRA_LDFLAGS. And while the cross-compilation of sdl itself somehow succeeds, this breaks my linking of XCSoar with the library further down ... I am really unsure about the right path forward here.

[madebr]

Fixed by #10534 (I think). If there are issues left, feel free to open a new issue or comment here.