If a header file (.h) included in the source file has also been included in a static library (.lib), what will happen?
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If a header file (.h) included in the source file has also been included in a static library (.lib), what will happen?
A typical library implementation will include its own header, so this is not a particularly special case.
If the header declares things like global static variables, you of course can’t define them more than once. Typically a library will include definitions for the data it declares (or, better, not declare any static global data) so your code that uses the library shouldn’t duplicate those.