Does the cache really need to be architecture-specific? Surely the bulk of it is strings so only numbers need to be wrapped in fixed-size/fixed-endian functions.
Ross, that's true, however, we mmap the cache and return pointers to data within it to the user, in type of structs that are public and part of fontconfig API. So, it's impossible to change the format without changing the API. And that would be fontconfig3.
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