Commits on Sep 29, 2024

1. Unify static linking for all operating systems and improve README …

   This commit unifies the code for static linking under all operating
   systems, with a focus on fixing problems for Windows:
   
   1.  All functionality for pkg-config is now enabled for Windows as well.
       For example, a vcpkg-built pkgconf works great.  Therefore, it seems
       there is no reason to prevent users from using pkg-config on Windows
       if they want to use it.
   
   2.  When not using pkg-config on Windows, and statically linking against
       FFmpeg libraries, many system libraries will also need to be linked.
       A list of known system libraries will now be linked in such
       situations.  It's best to use pkg-config, but this will at least
       reduce the probability of linker errors.  Note that we also have to
       do this for vcpkg as well.
   
   3.  Code duplication between Windows and other operating systems has
       been eliminated.
   
   4.  The statik flag is now correctly passed to pkg_config when in the
       static_linking function.
   
   5.  The GitHub Actions workflow is updated to test the new possibilities
       on Windows.  The example program is also run, which revealed that
       the existing vcpkg-based way of finding FFmpeg was missing several
       system libraries for linking.
   
   6.  Make significant improvements to the README.  More detailed
       information about environment variables, features, how the build
       script works, vcpkg triples, and more is included to help users
       work with the crate.
   
   Improving the functionality of dynamic linking is an obvious next step,
   but is out of scope of this commit.  It's likely that a single, large
   function can eventually be used for both static and dynamic linking.

   

   JohnstonJ committed Sep 29, 2024
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