Can I determine which compiler/linker flags where used to create a binary-only shared library ?

Question

I am wondering if there is a way to find out which g++ compiler/linker flags where used in creating a binary-only library.

For example there might be a 3rd party shared library (only .h/.so files are there).

So I think it would be a good idea to use the same g++ flags when compiling and linking my own application (that is using the binary-only 3rd party library).

Specifically I am asking for compiler flags like

• -fno-inline
• -pthreads
• -mtune=arch
• -O2

and also it would be of interest which linker flags have been used:

• -fpic or -fPIC
• -fexceptions
• -pthreads

and so on.

Answer 1

I don't believe so as there does not appear to be a section in the ELF format for that information. On Linux, if you use 'readelf -a' to dump all the information, there's nothing about how the file got that way.