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/* It is a constraint violation for a static function to be declared

   but not defined if it is used except in a sizeof expression whose

   result is an integer constant.  The use of the function simply

   being unevaluated is not enough.  */

/* Origin: Joseph Myers <jsm@polyomino.org.uk> */

/* { dg-do compile } */

/* { dg-options "-O2 -std=iso9899:1999 -pedantic-errors" } */

/* Constraint violation (trivial case, where function is used).  */

static void f0(void); /* { dg-error "used but never defined" } */

void g0(void) { f0(); }

/* Constraint violation.  */

static void f1(void); /* { dg-error "used but never defined" } */

void g1(void) { if (0) { f1(); } }

/* Constraint violation.  */

static int f2(void); /* { dg-error "used but never defined" } */

void g2(void) { 0 ? f2() : 0; }

/* OK.  */

static int f3(void);

void g3(void) { sizeof(f3()); }

/* OK (VM type, not VLA).  */

static int f4(void);

void g4(void) { sizeof(int (*)[f4()]); }

/* Constraint violation (VLA).  */

static int f5(void); /* { dg-error "used but never defined" "VLA" { xfail *-*-* } } */

void g5(void) { sizeof(int [0 ? f5() : 1]); }

/* OK (non-constant sizeof inside constant sizeof).  */

static int f6(void);

void g6(void) { sizeof(sizeof(int [f6()])); }