Can we convert 32 bit library file to 64 bit library file?
 

Hi,
I have some library files (.a files) in Solaris. I am porting my application to 64 bit Linux environment. Is there any way to convert the 32 bit libraries to 64 bit or should I regenerate the libraries in 64 bit?

would be much easier to recompile and rebuild that library

Solaris file formats are completely different to Linux; size eg 32 v 64 is irrelevant.
As pan64 says, if these are files you've generated, then rebuild from src, else get the official equiv from the relevant repo.