clang/test/Sema/knr-variadic-def.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s -std=c99
   2 // PR4287
   3
   4 #include <stdarg.h>
   5 char *foo = "test";
   6 int test(char*,...);
   7
   8 int test(fmt) // expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}
   9         char*fmt;
  10 {
  11         va_list ap;
  12         char*a;
  13         int x;
  14
  15         va_start(ap,fmt);
  16         a=va_arg(ap,char*);
  17         x=(a!=foo);
  18         va_end(ap);
  19         return x;
  20 }
  21
  22 void exit(); // expected-warning {{a function declaration without a prototype is deprecated in all versions of C}}
  23
  24 int main(argc,argv) // expected-warning {{a function definition without a prototype is deprecated in all versions of C and is not supported in C23}}
  25         int argc;char**argv;
  26 {
  27         exit(test("",foo));
  28 }
  29