* Compiling sources (working flags for G++)

/home/fursin/fggprogs/android-ndk-r13b/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-g++
 -DANDROID
 -DGOOGLE_PROTOBUF_CMAKE_BUILD
 -DHAVE_PTHREAD
 -DHAVE_ZLIB
 -isystem /home/fursin/fggprogs/android-ndk-r13b/platforms/android-21/arch-arm64/usr/include
 -isystem /home/fursin/fggprogs/android-ndk-r13b/sources/cxx-stl/gnu-libstdc++/4.9/include
 -isystem /home/fursin/fggprogs/android-ndk-r13b/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/include
 -isystem /home/fursin/fggprogs/android-ndk-r13b/sources/cxx-stl/gnu-libstdc++/4.9/include/backward
 -I/home/fursin/CK-TOOLS/lib-protobuf-3.0.0-android-ndk-4.9.x-android21-arm64/obj
 -I/home/fursin/CK-TOOLS/lib-protobuf-3.0.0-android-ndk-4.9.x-android21-arm64/protobuf-3.0.0/src
 -fexceptions
 -frtti
 -Wno-psabi
 --sysroot=/home/fursin/fggprogs/android-ndk-r13b/platforms/android-21/arch-arm64
 -funwind-tables
 -fsigned-char
 -no-canonical-prefixes
 -fdata-sections
 -ffunction-sections
 -Wa,--noexecstack
 -fomit-frame-pointer
 -fstrict-aliasing
 -funswitch-loops
 -finline-limit=300
 -O3
 -DNDEBUG
 -fPIC
 -o CMakeFiles/libprotobuf-lite.dir/home/fursin/CK-TOOLS/lib-protobuf-3.0.0-android-ndk-4.9.x-android21-arm64/protobuf-3.0.0/src/google/protobuf/arena.cc.o
 -c /home/fursin/CK-TOOLS/lib-protobuf-3.0.0-android-ndk-4.9.x-android21-arm64/protobuf-3.0.0/src/google/protobuf/arena.cc

* Linking bin (working flags for G++)

/home/fursin/fggprogs/android-ndk-r13b/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-gcc
 -fexceptions
 -frtti
 -Wno-psabi
 --sysroot=/home/fursin/fggprogs/android-ndk-r13b/platforms/android-21/arch-arm64
 -funwind-tables
 -fsigned-char
 -no-canonical-prefixes
 -fdata-sections
 -ffunction-sections
 -Wa,--noexecstack
 -fomit-frame-pointer
 -fstrict-aliasing
 -funswitch-loops
 -finline-limit=300
 -O3
 -DNDEBUG
 -Wl,--no-undefined
 -Wl,-allow-shlib-undefined
 -Wl,--gc-sections
 -Wl,-z,noexecstack
 -Wl,-z,relro
 -Wl,-z,now
 -Wl,-z,nocopyreloc
 -fPIE -pie
 CMakeFiles/protoc.dir/home/fursin/CK-TOOLS/lib-protobuf-3.0.0-android-ndk-4.9.x-android21-arm64/protobuf-3.0.0/src/google/protobuf/compiler/main.cc.o
 -o protoc  
 -L/home/fursin/CK-TOOLS/lib-protobuf-3.0.0-android-ndk-4.9.x-android21-arm64/install/libs/arm64-v8a
  libprotobuf.a libprotoc.a libprotobuf.a 
 /home/fursin/fggprogs/android-ndk-r13b/platforms/android-21/arch-arm64/usr/lib/libz.so
 "/home/fursin/fggprogs/android-ndk-r13b/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/libgnustl_static.a"
 "/home/fursin/fggprogs/android-ndk-r13b/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/libsupc++.a"
 -lm

Minimal compile flags:
 -DANDROID
 -fexceptions
 -frtti
 -Wno-psabi
 -funwind-tables
 -fsigned-char
 -no-canonical-prefixes
 -fdata-sections
 -ffunction-sections
 -Wa,--noexecstack
 -fomit-frame-pointer
 -fstrict-aliasing
 -funswitch-loops
 -finline-limit=300

Minimal linking flags:
 -Wl,--no-undefined
 -Wl,-allow-shlib-undefined
 -Wl,--gc-sections
 -Wl,-z,noexecstack
 -Wl,-z,relro
 -Wl,-z,now
 -Wl,-z,nocopyreloc