gcc/testsuite/gcc.dg/inline4.c


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/* { dg-do compile } */
/* { dg-options "-Wall -std=gnu89" } */
/* This testcase should fail since we're redefining foo in the same
   translation unit.  */
int foo (void) { return 2; } /* { dg-message "note: previous definition of" } */
extern inline int foo (void) { return 1; } /* { dg-error "redefinition of" } */