broken mkspec compile test for android ndk r18 on qtbase (missing libc++abi) or perhaps libunwind?

d:/android_ndk_r18/build//../toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe -Wl,--gc-sections -Wl,-z,nocopyreloc --sysroot=d:/android_ndk_r18/build//../platforms/android-16/arch-x86 -Wl,-rpath-link=d:/android_ndk_r18/build//../platforms/android-16/arch-x86/usr/lib -Wl,-rpath-link=./obj/local/x86 ./obj/local/x86/objs/program/test.o ./obj/local/x86/objs/program/test_fn.o d:/android_ndk_r18/build//../sources/cxx-stl/llvm-libc++/libs/x86/libc++_static.a d:/android_ndk_r18/build//../sources/cxx-stl/llvm-libc++abi/../llvm-libc++/libs/x86/libc++abi.a d:/android_ndk_r18/build//../sources/android/support/../../cxx-stl/llvm-libc++/libs/x86/libandroid_support.a -lgcc -Wl,--exclude-libs,libgcc.a -latomic -Wl,--exclude-libs,libatomic.a -target i686-none-linux-android16 -no-canonical-prefixes   -gcc-toolchain d:/android_ndk_r18/build//../toolchains/x86-4.9/prebuilt/windows-x86_64   -Wl,--build-id -nostdlib++ -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -Wl,--warn-shared-textrel -Wl,--fatal-warnings -fPIE -pie   -lc -lm -o ./obj/local/x86/program

> d:/android_ndk_r18/toolchains/llvm/prebuilt/windows-x86_64/bin/clang++ -D__ANDROID_API__=16 -target armv7-none-linux-androideabi -gcc-toolchain d:/android_ndk_r18/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64 -Wl,--exclude-libs,libgcc.a --sysroot=d:/android_ndk_r18/platforms/android-16/arch-arm/ -Wl,-soname,libc++1z.so -Wl,--no-undefined -Wl,-z,noexecstack -shared -o libc++1z.so main.obj   -Ld:/android_ndk_r18/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a -lc++_static -llog -lz -lm -ldl -lc
> main.obj:main.cpp:function main: error: undefined reference to '__cxa_allocate_exception'
> main.obj:main.cpp:function main: error: undefined reference to '__cxa_throw'
> main.obj:main.cpp:function main: error: undefined reference to 'std::exception::~exception()'