Adding non-iOS targets to Xcode project fails to build: Flutter not found #54680
Description
Reproduction steps:
$ flutter create test_build_configuration
$ cd test_build_configuration
$ open ios/Runner.xcworkspace
In Xcode:
File > New > Target > watchOS > Intents Extension > Any name > Activate
Add development team
Build new extension scheme
Ld /Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Intermediates.noindex/Runner.build/Debug-watchos/Anything.build/Objects-normal/armv7k/Binary/Anything normal armv7k (in target 'Anything' from project 'Runner')
cd /Users/m/Projects/test_build_configuration/ios
/Users/m/Applications/Xcode-11-4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -target armv7k-apple-watchos6.2 -isysroot /Users/m/Applications/Xcode-11-4.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS6.2.sdk -L/Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Products/Debug-watchos -F/Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Products/Debug-watchos -filelist /Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Intermediates.noindex/Runner.build/Debug-watchos/Anything.build/Objects-normal/armv7k/Anything.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @executable_path/../../Frameworks -Xlinker -rpath -Xlinker @executable_path/../../../../Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Intermediates.noindex/Runner.build/Debug-watchos/Anything.build/Objects-normal/armv7k/Anything_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -fembed-bitcode-marker -fobjc-arc -fobjc-link-runtime -fapplication-extension -framework Flutter -e _NSExtensionMain -Xlinker -dependency_info -Xlinker /Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Intermediates.noindex/Runner.build/Debug-watchos/Anything.build/Objects-normal/armv7k/Anything_dependency_info.dat -o /Users/m/Library/Developer/Xcode/DerivedData/Runner-gqrdmqfcslfkfmftjruzfuvvhszh/Build/Intermediates.noindex/Runner.build/Debug-watchos/Anything.build/Objects-normal/armv7k/Binary/Anything
ld: framework not found Flutter
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Additionally, adding a non-Flutter target may succeed, but still incorrectly links on Flutter.
The problems seems to be that the watch and watch extension targets inherit the linker flags from "ios/Flutter/Generated.xcconfig", which sets
OTHER_LDFLAGS=$(inherited) -framework Flutter. Consequently the link fails, because these targets do not contain the flutter framework. Currently it is fixed by settingOTHER_LDFLAGS=""for the watch and watch extension targets, though it would be more convenient if this manual adjustment is not necessary. As this setting seems to be a side effect of fixing #50568 , do you have some insight if this setting could be limited to the Runner target?
The Runner project should not set a base configuration since the generated Flutter build settings (particularly linker flags) should not pollute other targets. The Runner target (and any test targets) should use the base configuration.
should instead be:
