如何在共享库中隐藏依赖项的 function 名称？

Question

I'm buiding a shared library on Linux, which reference to other library like boost , CryptoPP , jsoncpp . The problem is the final.so file contains function names, in IDA Pro :

I thought it's because linking to dynamic library, so I build boost static library, but boost function names still visible.

I tried strip the.so file:

strip my.so
strip --strip-unneeded -x my.so

Still no luck.

Some competitors may reverse engineer my library, how to hide these function names to make it more difficult to crack?

Answer 1

LOCAL_LDFLAGS += -Wl,--exclude-libs,ALL, -Wl,--gc-sections 

Answer 2

You should

• compile with -fvisility=hidden (functions which are actually exported should be marked with __attribute__((visibility("default"))) in code
• link against static versions of external libraries (by using -l:libXYZ.a syntax in LDFLAGS ); of course they need to be present on your system.