OS X Build failed unistd.h: No such file or directory

[chrstnwhlrt]

The build fails with

    "g++"   -O3 -finline-functions -Wno-inline -Wall -pedantic -Wextra -Wno-long-long -DBOOST_ALL_NO_LIB=1 -DBOOST_All_STATIC_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_SYSTEM_STATIC_LINK=1 -DNDEBUG  -I"." -c -o "/tmp/ndk-christian/tmp/build-57372/build-boost/armeabi-v7a/gnu-4.9/build/boost/bin.v2/libs/chrono/build/gcc-arm/release/abi-aapcs/binary-format-elf/link-static/target-os-android/threading-multi/thread_clock.o" "libs/chrono/src/thread_clock.cpp"

In file included from ./boost/config.hpp:48:0,
                 from ./boost/chrono/config.hpp:15,
                 from ./boost/chrono/detail/inlined/thread_clock.hpp:14,
                 from libs/chrono/src/thread_clock.cpp:18:
./boost/config/stdlib/libstdcpp3.hpp:78:22: fatal error: unistd.h: No such file or directory
 #  include <unistd.h>
                      ^
compilation terminated.
...failed updating 3 targets...
ERROR: Couldn't build Boost 1.65.1 armeabi-v7a libraries

XCode works, I did xcode-select --install but it didn't help..

[dec1]

I take it you're building with ndk 16 beta?
If not please provide more details

[chrstnwhlrt]

@dec1 Oh yes I am using the android studio 3 beta 6 - which seems to ship with the ndk 16rc1. Reverted the ndk and the build worked just fine.

[dec1]

Ok.
If you want to build with the new ndk 16 beta you can try the new ndk 16 branch:
https://github.com/dec1/Boost-for-Android/tree/ndk_16