Issue building for Android

[hmc-cs-mdrissi]

System information

• Operating system: Ubuntu 16.04
• Compiler version: c++ 5.4.11
• CMake version: 3.5.1
• CMake arguments: -DPYTHON_INCLUDE_DIR=/usr/include/python3.5
  -DPYTHON_EXECUTABLE=/usr/bin/python3
  -DPYTHON_LIBRARY=/usr/libpython3.5m.so
• Relevant libraries/versions (e.g. CUDA): cuda 9, android sdk 27

The build issue occurs at the point when I try to run the build_android.sh script. That script ends up crashing and its output looks like (I made it collapsible to make the post easier to read),

Bash: GNU bash, version 4.3.48(1)-release (x86_64-pc-linux-gnu) Caffe2 path: /home/mehdi2277/Documents/Programming/caffe2 Using Android NDK at /home/mehdi2277/Android/Sdk/ndk-bundle Building protoc -- Configuring done -- Generating done -- Build files have been written to: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/build [ 0%] Built target js_embed [ 12%] Built target libprotobuf-lite [ 52%] Built target libprotobuf [ 99%] Built target libprotoc [100%] Built target protoc Install the project... -- Install configuration: "" -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/libprotobuf-lite.a -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/libprotobuf.a -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/libprotoc.a -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/bin/protoc -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/pkgconfig/protobuf.pc -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/pkgconfig/protobuf-lite.pc -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/any.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/any.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/api.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/arena.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/arena_impl.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/arenastring.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/code_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/command_line_interface.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/cpp/cpp_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/csharp/csharp_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/csharp/csharp_names.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/importer.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/java/java_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/java/java_names.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/javanano/javanano_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/js/js_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/js/well_known_types_embed.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/objectivec/objectivec_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/objectivec/objectivec_helpers.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/parser.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/php/php_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/plugin.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/plugin.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/python/python_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/ruby/ruby_generator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/descriptor.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/descriptor.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/descriptor_database.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/duration.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/dynamic_message.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/empty.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/extension_set.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/field_mask.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/generated_enum_reflection.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/generated_enum_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/generated_message_reflection.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/generated_message_table_driven.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/generated_message_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/has_bits.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/coded_stream.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/gzip_stream.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/printer.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/strtod.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/tokenizer.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/zero_copy_stream.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/zero_copy_stream_impl.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/io/zero_copy_stream_impl_lite.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map_entry.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map_entry_lite.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map_field.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map_field_inl.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map_field_lite.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/map_type_handler.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/message.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/message_lite.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/metadata.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/metadata_lite.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/reflection.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/reflection_ops.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/repeated_field.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/service.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/source_context.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/struct.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomic_sequence_num.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_arm64_gcc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_arm_gcc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_arm_qnx.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_atomicword_compat.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_generic_c11_atomic.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_generic_gcc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_mips_gcc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_power.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_ppc_gcc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_solaris.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_tsan.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_x86_gcc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/atomicops_internals_x86_msvc.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/bytestream.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/callback.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/casts.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/common.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/fastmem.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/hash.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/logging.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/macros.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/mutex.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/once.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/platform_macros.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/port.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/scoped_ptr.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/shared_ptr.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/singleton.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/status.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/stl_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/stringpiece.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/template_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/stubs/type_traits.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/text_format.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/timestamp.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/type.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/unknown_field_set.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/delimited_message_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/field_comparator.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/field_mask_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/json_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/message_differencer.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/time_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/type_resolver.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/util/type_resolver_util.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/wire_format.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/wire_format_lite.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/wire_format_lite_inl.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/wrappers.pb.h -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/descriptor.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/any.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/api.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/duration.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/empty.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/field_mask.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/source_context.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/struct.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/timestamp.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/type.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/wrappers.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/include/google/protobuf/compiler/plugin.proto -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf/protobuf-targets.cmake -- Installing: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf/protobuf-targets-noconfig.cmake -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf/protobuf-module.cmake -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf/protobuf-options.cmake -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf/protobuf-config.cmake -- Up-to-date: /home/mehdi2277/Documents/Programming/caffe2/build_host_protoc/lib/cmake/protobuf/protobuf-config-version.cmake CMake Error at third_party/android-cmake/android.toolchain.cmake:310 (file): file STRINGS file "/home/mehdi2277/Android/Sdk/ndk-bundle/platforms/android-21/arch-arm/usr/include/android/api-level.h" cannot be read. Call Stack (most recent call first): third_party/android-cmake/android.toolchain.cmake:814 (__DETECT_NATIVE_API_LEVEL) build_android/CMakeFiles/3.5.1/CMakeSystem.cmake:6 (include) CMakeLists.txt:6 (project) CMake Error at third_party/android-cmake/android.toolchain.cmake:816 (message): Specified Android API level (21) does not match to the level found (). Probably your copy of NDK is broken. Call Stack (most recent call first): build_android/CMakeFiles/3.5.1/CMakeSystem.cmake:6 (include) CMakeLists.txt:6 (project) -- Need to define long as a separate typeid. -- Turning off deprecation warning due to glog. -- Use custom protobuf build. CMake Error at /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:148 (message): Could NOT find Threads (missing: Threads_FOUND) Call Stack (most recent call first): /usr/share/cmake-3.5/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake-3.5/Modules/FindThreads.cmake:223 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) third_party/protobuf/cmake/CMakeLists.txt:84 (find_package) -- Configuring incomplete, errors occurred! See also "/home/mehdi2277/Documents/Programming/caffe2/build_android/CMakeFiles/CMakeOutput.log". See also "/home/mehdi2277/Documents/Programming/caffe2/build_android/CMakeFiles/CMakeError.log".

In case it helps, the cmakeoutput.log and cmakeerror.log files look like,

CMakeOutput.log

The target system is: Android - 1 - armv7-a The host system is: Linux - 4.10.0-42-generic - x86_64

CMakeError.log

Performing C++ SOURCE FILE Test CAFFE2_LONG_IS_INT32_OR_64 failed with the following output: Source file was: #include template void Foo(); template<> void Foo() {} template<> void Foo() {} int main(int argc, char** argv) { Foo(); return 0; } Performing C++ SOURCE FILE Test CAFFE2_NEED_TO_TURN_OFF_DEPRECATION_WARNING failed with the following output: Source file was: #include int main(int argc, char** argv) { return 0; } Performing C++ SOURCE FILE Test CAFFE2_COMPILER_SUPPORTS_AVX2_EXTENSIONS failed with the following output: Source file was: #include int main() { __m256i a, b; a = _mm256_set1_epi8 (1); b = a; _mm256_add_epi8 (a,a); return 0; } Determining if the include file pthread.h exists failed with the following output:

The first error the build file has is about not finding /home/mehdi2277/Android/Sdk/ndk-bundle/platforms/android-21/arch-arm/usr/include/android/api-level.h. Checking that location there is no include directory under android-21/arch-arm/usr. Based off this stack overflow issue (https://stackoverflow.com/questions/48041862/usr-include-missing-from-ndk-r16b) it seems like the location of the api-level.h file got moved recently in the ndk-bundle to a different place. Now its located under ndk-bundle/sysroot/usr/include/android/api-level.h.

edit: Doing a bit more reading it looks like the issue has to do with the most recent stable version of the android ndk (16b) uses unified headers (https://github.com/android-ndk/ndk/wiki/Changelog-r16). The tool used to build caffe2 for android (android-cmake) doesn't work with the current ndk (taka-no-me/android-cmake#102). So I guess the issue isn't really a caffe2 issue, but more of a third party tool issue. It'd still be helpful to document in the installation guide that the current version of the android ndk is not supported.

[breadbread1984]

can only compile successfully with r15c or version below.

[Maratyszcza]

#1740 should fix this

[monkey-jsun]

@Maratyszcza Can we get a patch in the mean while? It seems outsiders cannot merge this change and I'm hitting the same issue here.

Thanks.

[Maratyszcza]

@monkey-jsun Yes, this patch will land to master after we update our CI scripts

[Maratyszcza]

Should be fixed with bc3da23. Please re-open if you still have this problem.