Adding a custom Objective-C or Objective-C++ file to an iOS project currently breaks the build. You can reproduce it by adding an empty file with

ios {
  OBJECTIVE_SOURCES += MyClass.m
}

to the project file and run it for the simulator target. The resulting error is something like:

ld: '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/arc/libarclite_iphonesimulator.a(arclite.o)' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

(it might be another library if adding others to the project, so I guess the library itself is irrelevant).

This only happens for Simulator build targets and not for devices. Probably there is something messed up in the default project configuration from qmake?