Library extension .a/.so

[John Vetterli]

On Tue, 26 Apr 2005, Peter wrote:
> On Mon, 25 Apr 2005, Byron L. Sonne wrote:
>>> What is the difference in libraries ending with extension .a and .so.
>>> Can one convert  from somelib.a to somelib.so?
>> I'd like to know as well - I've tended to think that it's the difference 
>> between static and dynamic, but upon reflection I don't have a good reason 
>> for thinking that. Or if I did, I've forgotten it.
> type 'file somelib.so someother.a' and see

This site gives some info on how to create a shared-object library:
http://www.linux.com/howtos/Program-Library-HOWTO/more-examples.shtml

To convert from libsomething.a to libsomething.so, I'm guessing you would 
have to extract the object files from libsomething.a with the ar program, 
then follow the instructions on that page to use them to build 
libsomething.so.

Not that I have ever tried this.

My 2 cents.
JV
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