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17 lines
266 B
C
17 lines
266 B
C
#ifdef CHECK_VARIABLE_EXISTS
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extern int CHECK_VARIABLE_EXISTS;
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int main()
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{
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int* p;
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p = &CHECK_VARIABLE_EXISTS;
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return 0;
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}
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#else /* CHECK_VARIABLE_EXISTS */
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# error "CHECK_VARIABLE_EXISTS has to specify the variable"
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#endif /* CHECK_VARIABLE_EXISTS */
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