On Mon, Jul 11, 2022 at 11:19 AM Martin Storsjö <[email protected]> wrote:
> +#if (AV_GCC_VERSION_AT_LEAST(4,0) || defined(__clang__)) && 
> (defined(__ELF__) || defined(__MACH__))
> +#    define av_visibility_hidden __attribute__((visibility("hidden")))
> +#else
> +#    define av_visibility_hidden
> +#endif

The usual approach is to compile with -fvisibility=hidden and
explicitly flag exported API symbols.

Is there a reason for doing this the other way around?
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