mame % make -j1 SDL_INSTALL_ROOT=/opt/arm VERBOSE=1
Clang 12.0.0 detected
/Applications/Xcode-beta.app/Contents/Developer/usr/bin/make -R verbose=1 -C build/projects/sdl/mame/gmake-osx-clang config=release32 precompile
/Applications/Xcode-beta.app/Contents/Developer/usr/bin/make -R verbose=1 -C build/projects/sdl/mame/gmake-osx-clang config=release32
Objective-C compiling 3rdparty/bgfx/src/glcontext_nsgl.mm...
clang++    -MMD -MP -MP -DNDEBUG -DCRLF=2 -DLSB_FIRST -DFLAC__NO_DLL -DPUGIXML_HEADER_ONLY -DMAME_NOASM -DLUA_COMPAT_ALL -DLUA_COMPAT_5_1 -DLUA_COMPAT_5_2 -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_CONSTANT_MACROS -DBGFX_CONFIG_MAX_FRAME_BUFFERS=128 -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -I"../../../../../3rdparty/bgfx/include" -I"../../../../../3rdparty/bgfx/3rdparty" -I"../../../../../3rdparty/bx/include" -I"../../../../../3rdparty/bimg/include" -I"../../../../../3rdparty/bgfx/3rdparty/dxsdk/include" -I"../../../../../3rdparty/bgfx/3rdparty/khronos" -I"../../../../../3rdparty/bx/include/compat/osx"  -m32 -arch i386 -pipe -Werror -O3 -fno-strict-aliasing -Wno-unknown-pragmas -Wall -Wcast-align -Wundef -Wformat-security -Wwrite-strings -Wno-sign-compare -Wno-conversion -Wno-error=deprecated-declarations -Wno-cast-align -Wno-tautological-compare -Wno-unused-value -Wno-constant-logical-operand -fdiagnostics-show-note-include-stack -Wno-unknown-warning-option -Wno-extern-c-compat -Wno-unknown-attributes -Wno-ignored-qualifiers -Wno-pragma-pack -m32 -Wno-uninitialized -Wno-unused-function -Wno-unused-variable -Wno-unused-but-set-variable -Wno-format-extra-args -Wno-switch -x objective-c++ -std=c++14 -Wpointer-arith  -o "../../../../osx_clang/obj/x32/Release/3rdparty/bgfx/src/glcontext_nsgl.o" -c "../../../../../3rdparty/bgfx/src/glcontext_nsgl.mm"
In file included from ../../../../../3rdparty/bgfx/src/glcontext_nsgl.mm:11:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:27:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSCollectionView.h:9:
/Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSViewController.h:248:39: error:
      unknown type name 'NSExtensionContext'; did you mean 'NSAnimationContext'?
@property (nullable, readonly,retain) NSExtensionContext *extensionConte...
                                      ^
In file included from ../../../../../3rdparty/bgfx/src/glcontext_nsgl.mm:11:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:17:
/Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSAnimationContext.h:19:12: note:
      'NSAnimationContext' declared here
@interface NSAnimationContext : NSObject
           ^
In file included from ../../../../../3rdparty/bgfx/src/glcontext_nsgl.mm:11:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:99:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSSharingServicePickerTouchBarItem.h:9:
/Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSSharingService.h:181:119: error:
      expected a type
  ...*)cloudKitSharingService shareProvider:(NSItemProvider *)provider;
                                             ^
/Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSSharingService.h:196:12: error:
      cannot find interface declaration for 'NSItemProvider'
@interface NSItemProvider (NSCloudKitSharing)
           ^
In file included from ../../../../../3rdparty/bgfx/src/glcontext_nsgl.mm:11:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Cocoa.framework/Headers/Cocoa.h:13:
In file included from /Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:252:
/Applications/xcode-beta.app/contents/developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSItemProvider.h:16:12: error:
      cannot find interface declaration for 'NSItemProvider'
@interface NSItemProvider (NSItemSourceInfo)
           ^
4 errors generated.
make[2]: *** [../../../../osx_clang/obj/x32/Release/3rdparty/bgfx/src/glcontext_nsgl.o] Error 1
make[1]: *** [bgfx] Error 2
make: *** [macosx_x86_clang] Error 2