gcc/testsuite/gcc.dg/missing-header-fixit-5.c

   1
   2 /* Forget to include any standard headers, all for built-in functions.
   3    Rely on -Wimplicit-function-declaration for fixit hints, not on
   4    -Wbuiltin-declaration-mismatch (which misses abs, isdigit, putchar).  */
   5
   6 /* { dg-options "-fdiagnostics-show-caret -fdiagnostics-show-line-numbers -Wimplicit-function-declaration -Wno-builtin-declaration-mismatch" } */
   7
   8 int
   9 foo (char *m, int i)
  10 {
  11   if (isdigit (m[0])) /* { dg-warning "implicit declaration of function" } */
  12   /* { dg-begin-multiline-output "" }
  13    11 |   if (isdigit (m[0]))
  14       |       ^~~~~~~
  15   +++ |+#include <ctype.h>
  16     1 |
  17      { dg-end-multiline-output "" } */
  18     {
  19       return abs (i); /* { dg-warning "implicit declaration of function" } */
  20   /* { dg-begin-multiline-output "" }
  21    19 |       return abs (i);
  22       |              ^~~
  23   +++ |+#include <stdlib.h>
  24     1 |
  25      { dg-end-multiline-output "" } */
  26     }
  27   else
  28     putchar (m[0]); /* { dg-warning "implicit declaration of function" } */
  29   /* { dg-begin-multiline-output "" }
  30    28 |     putchar (m[0]);
  31       |     ^~~~~~~
  32   +++ |+#include <stdio.h>
  33     1 |
  34      { dg-end-multiline-output "" } */
  35   return i;
  36 }