Adding x86 target to your Android App allows developers to compile their native code libraries for x86 platforms in addition to ARM. This expands an app's reach to devices with Intel processors. Most NDK apps will run on x86 without recompilation by setting the APP_ABI flag in Application.mk to "all" or "x86". For code using SIMD or processor-specific instructions, modifications may be needed along with compiler optimizations like vectorization for best performance on x86. Debugging tools like Valgrind, GDB and logcat work to debug native code issues on both ARM and x86 Android platforms.