Segher Boessenkool wrote:
>> Nope. The builtins not only vary between gcc versions, but they also
>> have a nasty tendency to generate calls to library functions, sometimes
>> libgcc functions. Hence -ffreestanding.
>
> -ffreestanding will still generate calls to libgcc functions.
> -ffreestanding doesn't disable _all_ of the C library, either.
>
No, it doesn't, but it does inhibit builtin functions, and so provides a
bit more ABI stability.
-hpa
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