Follow-up Comment #2, bug #30363 (project avr-libc):
> The define define value for __HAS_DELAY_CYCLES
> in the new <util/delah.h> seems backwards.
This define is generated by the configure script, as it is
probing the compiler features. This is the only way I could
see how to find out whether __builtin_avr_delay_cycles() is
available or not.
The drawback is that a compiled version of the library is
no longer portable into an environment using a compiler that
does not offer __builtin_avr_delay_cycles() when the compiler
used to compile the binary version did offer it.
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