How to change version information of *.a files after compilation

I would like to know what is the way (if it is possible at all), to change the version information of a *.a files in Unix after the compilation. I know how to do it for Dll files in windows - but have no idea how to manage with it in Unix.

Thank you all!开发者_如何学C

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Static libraries are just archives of .o files - they don't embed version themselves unless your code somehow publishes a symbol that holds version information.

Like:

int libFoo_version = 0x01000000;

Or you could use

char* libFoo_version = "1.0";

and afterwards use something like the strings libFoo.a | grep libFoo_version command in combination with sed to alter the version information.

Yet another option is to embed an empty file in the archive which name contains the version information. YMMV

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Static libraries don't have version information per se.

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If the version is part of the source code (for example, a string constant), then you can simply use sed to change it if the new version has the same length as the old one.