Echelon Neuron C Manual de usuario Pagina 58

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38 Compiler Directives
...
#else
#ifdef YYY
...
#else
#error “You must define either XXX or YYY”
#endif
#endif
This directive differs from the ANSI C #error directive in that the Neuron C
version requires a quoted string.
#warning “
text
This directive allows you to issue a custom warning message. When this
directive is processed, program compilation continues. This directive is
useful for managing conditional compilation, for example:
#ifdef XXX
...
#else
#ifdef YYY
...
#else
#warning “You should define either XXX or YYY”
#endif
#endif
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