error: C compiler cannot create executables in buildozer

Run this command:
cp -r ~/.buildozer/android/platform/android-ndk-r9d/platforms/android-19 ~/.buildozer/android/platform/android-ndk-r9d/platforms/android-20

From here: https://groups.google.com/forum/#!msg/kivy-dev/iyPOwoN9wHY/dajh0kfUClcJ

Error message: 

Run prebuild

Call prebuild_hostpython

Call prebuild_python

Call prebuild_sdl

Call prebuild_zope

Call prebuild_pygame

Call prebuild_pyjnius

Call prebuild_twisted

missing header for unified diff at line 3 of patch

patching file twisted/python/compat.py

Call prebuild_android

Call prebuild_kivy

Run build

Skipped build_hostpython

Call build_python

Entering in ARM environment

Compiler found at /Users/fengwei/.buildozer/android/platform/android-ndk-r9d/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64/bin//arm-linux-androideabi-gcc

configure: WARNING: if you wanted to set the --build type, don't use --host.

    If a cross compiler is detected then cross compile mode will be used

checking for --enable-universalsdk... no

checking for --with-universal-archs... 32-bit

checking MACHDEP... darwin

checking EXTRAPLATDIR... $(PLATMACDIRS)

checking machine type as reported by uname -m... x86_64

checking for --without-gcc... no

checking for arm-eabi-gcc... arm-linux-androideabi-gcc -DANDROID -mandroid  -fomit-frame-pointer --sysroot /Users/fengwei/.buildozer/android/platform/android-ndk-r9d/platforms/android-20/arch-arm

checking whether the C compiler works... no

configure: error: in `/Users/fengwei/Documents/paper/icas/trunk/code/ICAS-AndroidNetclientTester/src/.buildozer/android/platform/python-for-android/build/python/Python-2.7.2':

configure: error: C compiler cannot create executables

See `config.log' for more details

# Command failed: ./distribute.sh -m "kivy twisted" -d "chordclient"