Upstream to AOSP ndk-release-r22

.clang-format

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+BasedOnStyle: LLVM
+
+---
+Language: Cpp
+Standard: Cpp03
+
+AlwaysBreakTemplateDeclarations: true
+PointerAlignment: Left
+
+# Disable formatting options which may break tests.
+SortIncludes: false
+ReflowComments: false
+---

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+#lib/ # We actually have things checked in to lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.cache
+nosetests.xml
+coverage.xml
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# MSVC libraries test harness
+env.lst
+keep.lst
+
+# Editor by-products
+.vscode/

Android.mk

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+# This file is dual licensed under the MIT and the University of Illinois Open
+# Source Licenses. See LICENSE.TXT for details.
+
+LOCAL_PATH := $(call my-dir)
+
+# libcxx defines
+libcxx_includes := $(LOCAL_PATH)/include
+libcxx_export_includes := $(libcxx_includes)
+libcxx_sources := \
+    algorithm.cpp \
+    any.cpp \
+    atomic.cpp \
+    barrier.cpp \
+    bind.cpp \
+    charconv.cpp \
+    chrono.cpp \
+    condition_variable.cpp \
+    condition_variable_destructor.cpp \
+    debug.cpp \
+    exception.cpp \
+    filesystem/directory_iterator.cpp \
+    filesystem/int128_builtins.cpp \
+    filesystem/operations.cpp \
+    functional.cpp \
+    future.cpp \
+    hash.cpp \
+    ios.cpp \
+    iostream.cpp \
+    locale.cpp \
+    memory.cpp \
+    mutex.cpp \
+    mutex_destructor.cpp \
+    new.cpp \
+    optional.cpp \
+    random.cpp \
+    regex.cpp \
+    shared_mutex.cpp \
+    stdexcept.cpp \
+    string.cpp \
+    strstream.cpp \
+    system_error.cpp \
+    thread.cpp \
+    typeinfo.cpp \
+    utility.cpp \
+    valarray.cpp \
+    variant.cpp \
+    vector.cpp \
+
+libcxx_sources := $(libcxx_sources:%=src/%)
+
+libcxx_export_cxxflags :=
+
+libcxx_cxxflags := \
+    -std=c++1z \
+    -DLIBCXX_BUILDING_LIBCXXABI \
+    -D_LIBCPP_NO_EXCEPTIONS \
+    -D_LIBCPP_NO_RTTI \
+    -D_LIBCPP_BUILDING_LIBRARY \
+    -D__STDC_FORMAT_MACROS \
+    $(libcxx_export_cxxflags) \
+
+
+libcxx_ldflags :=
+libcxx_export_ldflags :=
+
+# libcxxabi defines
+libcxxabi_src_files := \
+    abort_message.cpp \
+    cxa_aux_runtime.cpp \
+    cxa_default_handlers.cpp \
+    cxa_demangle.cpp \
+    cxa_exception_storage.cpp \
+    cxa_guard.cpp \
+    cxa_handlers.cpp \
+    cxa_noexception.cpp \
+    cxa_thread_atexit.cpp \
+    cxa_unexpected.cpp \
+    cxa_vector.cpp \
+    cxa_virtual.cpp \
+    fallback_malloc.cpp \
+    stdlib_exception.cpp \
+    stdlib_new_delete.cpp \
+    stdlib_stdexcept.cpp \
+    stdlib_typeinfo.cpp \
+
+libcxxabi_src_files := $(libcxxabi_src_files:%=src/abi/%)
+
+libcxxabi_includes := \
+    $(LOCAL_PATH)/include \
+    $(LOCAL_PATH)/include/abi \
+
+libcxxabi_cflags := -D__STDC_FORMAT_MACROS
+libcxxabi_cppflags := \
+    -D_LIBCXXABI_NO_EXCEPTIONS \
+    -Wno-macro-redefined \
+    -Wno-unknown-attributes \
+    -DHAS_THREAD_LOCAL
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libcxx
+LOCAL_SRC_FILES := $(libcxx_sources) $(libcxxabi_src_files)
+LOCAL_C_INCLUDES := $(libcxx_includes) $(libcxxabi_includes)
+LOCAL_CPPFLAGS := $(libcxx_cxxflags) $(libcxxabi_cppflags) -ffunction-sections -fdata-sections
+LOCAL_EXPORT_C_INCLUDES := $(libcxx_export_includes)
+LOCAL_EXPORT_CPPFLAGS := $(libcxx_export_cxxflags)
+LOCAL_EXPORT_LDFLAGS := $(libcxx_export_ldflags)
+LOCAL_ARM_NEON := false
+
+include $(BUILD_STATIC_LIBRARY)