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      1 /*	$NetBSD: msg_351.c,v 1.8 2024/03/01 17:22:55 rillig Exp $	*/
      2 # 3 "msg_351.c"
      3 
      4 // Test for message: missing%s header declaration for '%s' [351]
      5 
      6 /*
      7  * Warn about declarations or definitions for functions or objects that are
      8  * visible outside the current translation unit but do not have a previous
      9  * declaration in a header file.
     10  *
     11  * All symbols that are used across translation units should be declared in a
     12  * header file, to ensure consistent types.
     13  *
     14  * Since the storage class 'extern' is redundant for functions but not for
     15  * objects, the diagnostic omits it for functions.
     16  *
     17  * https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wmissing-declarations
     18  */
     19 
     20 /* expect+1: warning: missing header declaration for 'func_decl' [351] */
     21 void func_decl(void);
     22 /* expect+1: warning: missing header declaration for 'extern_func_decl' [351] */
     23 extern void extern_func_decl(void);
     24 static int static_func_decl(void);
     25 
     26 /* expect+3: warning: missing header declaration for 'func_def' [351] */
     27 void
     28 func_def(void)
     29 {
     30 }
     31 
     32 /* expect+3: warning: missing header declaration for 'extern_func_def' [351] */
     33 extern void
     34 extern_func_def(void)
     35 {
     36 }
     37 
     38 /* expect+2: warning: static function 'static_func_def' unused [236] */
     39 static void
     40 static_func_def(void)
     41 {
     42 }
     43 
     44 /* expect+1: warning: missing 'extern' header declaration for 'obj_decl' [351] */
     45 extern int obj_decl;
     46 /* expect+1: warning: missing 'extern' header declaration for 'obj_def' [351] */
     47 int obj_def;
     48 static int static_obj_def;
     49 
     50 
     51 # 18 "header.h" 1 3 4
     52 
     53 void func_decl(void);
     54 extern void extern_func_decl(void);
     55 static int static_func_decl(void);
     56 
     57 void func_def(void);
     58 extern void extern_func_def(void);
     59 static void static_func_def(void);
     60 
     61 void func_def_ok(void);
     62 extern void extern_func_def_ok(void);
     63 static void static_func_def_ok(void);
     64 
     65 extern int obj_decl;
     66 int obj_def;
     67 static int static_obj_def;
     68 
     69 # 70 "msg_351.c" 2
     70 
     71 void func_decl(void);
     72 extern void extern_func_decl(void);
     73 /* expect+1: warning: static function 'static_func_decl' declared but not defined [290] */
     74 static int static_func_decl(void);
     75 
     76 void
     77 func_def_ok(void)
     78 {
     79 }
     80 
     81 extern void
     82 extern_func_def_ok(void)
     83 {
     84 }
     85 
     86 /* expect+2: warning: static function 'static_func_def_ok' unused [236] */
     87 static void
     88 static_func_def_ok(void)
     89 {
     90 }
     91 
     92 extern int obj_decl;
     93 int obj_def;
     94 /* expect+1: warning: static variable 'static_obj_def' unused [226] */
     95 static int static_obj_def;
     96 
     97 
     98 /*
     99  * Do not warn about the temporary identifier generated for the object from the
    100  * compound literal.
    101  */
    102 /* expect+1: warning: missing 'extern' header declaration for 'dbl_ptr' [351] */
    103 double *dbl_ptr = &(double) { 0.0 };
    104