cross compile use ndkr16b on mac

[stevezhou6]

/Users/tools/android-ndk-r16b/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: fatal error: /Users/Desktop/facebookproxygen/buildbin/libsodium-android-armv7-a/lib: pread failed: Is a directory clang++: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [bin/BogoShim] Error 1 make[1]: *** [CMakeFiles/BogoShim.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... [100%] Linking CXX executable bin/fizz /Users/tools/android-ndk-r16b/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: fatal error: /Users/Desktop/facebookproxygen/buildbin/libsodium-android-armv7-a/lib: pread failed: Is a directory clang++: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [bin/fizz] Error 1 make[1]: *** [CMakeFiles/FizzTool.dir/all] Error 2 make: *** [all] Error 2 steve:facebookproxygen