gcc/testsuite/gcc.dg/cpp/ucnid-12.c


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/* Test spelling differences in UCNs in macro definitions still count
   as the same identifier for macro expansion.  */
/* { dg-do compile } */
/* { dg-options "-std=c99 -pedantic-errors" } */

#define m1\u00c1
#ifndef m1\u00C1
#error not defined
#endif

#define m2(\u00c1) \u00C1

int i = m2 (0);