libbz2.a vs libbz2.so

[Man-wai Chang]

Is there a way to convert a lib.a to lib.so?

I tried to upgrade the rpm on my test server from 3.0.6 to 4.0.3, it 
kept complaining about "libbz2.so.1 not found". I tried rebuilding 
bzip2, but there was no libbz2.so.1 produced, only a libbz2.a.

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