Preprocessing & #error
Wed Dec 10 13:20:00 GMT 2003
>Is it possible?
It is POSSIBLE, but you'd have to write your own pre-pre-processor. (Perhaps in Perl?)
Without doing to that extra-ordinary effort, it isn't possible with the pre-processor. AFAIK.
Or you could change the line to read...
#error BUG : 100 != 200
...but I presume that defeats the intent of having the token macro-expanded.
You could also modify your GCC to perform macro expansion on the error line. That may be more effort than writing your own pre-pre-processor (unless you are already familiar with GCC internals). And you'd have a custom one-off pre-processor in your GCC.
Pre-processor info here <http://www.delorie.com/gnu/docs/gcc/cpp_62.html>.
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