CODEWITHSUNDEEP
cgcclinkerandroid-ndkld
user48956
user48956

Reputation: 15788

How to remove unused references from a shared library (elf/gcc)

I'm building a shared library that contains a public interface found some object file public.o

The shared library is composed of 100+ other objects files and I want to minimize the size if the .so file. Is there a way to remove of all the symbols from from the shared library that are not referenced by public.o? Alternatively, is there a way to retain only dependencies of extern "C" functions, stripping all of the unused C++ names?

Upvotes: 3

Views: 2920

Answers (2)

Basile Starynkevitch
Basile Starynkevitch

Reputation: 1

You might use a recent GCC (e.g. a 4.6.1 version) and pass -flto at compile and at (library) link time.

(added) You could also play with the visibility attribute.

But I won't bother about the size of an *.so

Upvotes: 1

fghj
fghj

Reputation: 9404

Look at this manual:
http://gcc.gnu.org/wiki/Visibility
it explains for example how to handle C++ names stuff.

Upvotes: 2

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