linker/ - /system/bin/linker and /system/bin/linker64 Stuff like _cxa_guard_acquire and _cxa_pure_virtual live here. The C++ compiler doesn't know how to implement thread-safe static initialization and the like, so it just calls functions that are supplied by the system. This is where stuff like dlopen(3) lives. This is actually just a bunch of stubs that the dynamic linker replaces with pointers to its own implementation at runtime. Traditionally Unix systems kept stuff like sin(3) and cos(3) in a separate library to save space in the days before shared libraries. What are the big pieces of bionic? libc/ - libc.so, libc.a This documentation is about making changes to bionic itself. Bionic is Android's C library, math library, and dynamic linker.
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