Updating linked library name in an ELF binary(without recompiling)

 To update the linked library in your ELF executable without recompiling, you can use the patchelf tool. This tool allows you to modify the dynamic linker and RPATH of ELF executables. Here's how you can do it:

1. First, make sure you have patchelf installed. On most Linux distributions, you can install it using your package manager. For example, on Ubuntu or Debian:

   
   sudo apt-get install patchelf

2. Once installed, you can use patchelf to change the linked library. The command will look like this:

   
   patchelf --replace-needed libffi.so.6 libffi-mine.so.6 your_executable

   Replace your_executable with the actual name of your ELF binary.
3. After running this command, you can verify the change using the ldd command:

   
   ldd your_executable

   This should show that your executable is now linked against libffi-mine.so.6 instead of libffi.so.6.
4. If libffi-mine.so.6 is not in the standard library search path, you may need to add its location to the RPATH of your executable:

   
   patchelf --set-rpath /path/to/library/directory your_executable

   Replace /path/to/library/directory with the actual path where libffi-snps.so.6 is located.

Remember to make a backup of your original executable before making these changes. Also, ensure that libffi-snps.so.6 is compatible with your executable, as changing the linked library can lead to runtime issues if the new library is not compatible.

This method allows you to change the linked library without recompiling, but it's generally safer to recompile with the correct library if possible, as it ensures complete compatibility.