Find the complete function definition inside C++ shared object file

Question

I have a linker error where it says undefined reference to a function. The shared library where I expect the function to be has that function name ( I checked through nm -s ) so now the next thing I want to see is if the function parameters are correct. How do I see the type and number of parameters for a function in a shared object file ?

EDIT: So the problem it came to be was: I was trying to create a C++ shared object file by linking a shared C object, but in the C++ source I did not include the header inside "extern "C" " block, so it was not able to find those symbols, Thanks to all who replied to this question. This question is resolved now.

Answer 1

You can use nm with the --demangle option:

nm -s --demangle libWhatever.so

trying that out on a sample .so gives me output such as

00005820 T detail::print_(std::ostream&, cv::Mat const&, std::string const&)

T just means that it is in the object files used to make the .so and does not need to be resolved by the linker.