gcc/testsuite/gcc.dg/inline4.c

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