Viewing file:  Wbuiltin-declaration-mismatch-2.c (1.34 KB) -rw-r--r--
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/* PR c/83656 - missing -Wbuiltin-declaration-mismatch on declaration
without prototype
{ dg-do compile }
{ dg-options "-Wall -Wextra" } */
typedef __SIZE_TYPE__ size_t;
/* Verify that ordinary library built-ins are not diagnosed with -Wextra
when they take no arguments (except in cases of return type mismatches).
This is in anticipation that C may some day adopt the same syntax as
C++ for declaring functions that take no arguments. */
void abort ();
/* Verify that ordinary library built-ins are diagnosed with -Wextra
when they take arguments. */
void* memcpy (); /* { dg-warning "declaration of built-in function .memcpy. without a prototype; expected .void \\\*\\\(void \\\*, const void \\\*, \(long \)*unsigned int\\\)." } */
void* memset (); /* { dg-warning "declaration of built-in function .memset. without a prototype; expected .void \\\*\\\(void \\\*, int, *\(long \)*unsigned int\\\)." } */
size_t strlen (); /* { dg-warning "declaration of built-in function .strlen. without a prototype; expected .\(long \)*unsigned int\\\(const char \\\*\\\)." } */
/* Variadic built-ins are diagnosed even without -Wextra (they are,
in fact, diagnosed by default). */
int printf (); /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */
int sprintf (); /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" } */
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