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If you want to not warn on K&R main(); this is how it should be implemented.

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This commit is contained in:
David E. O'Brien 2002-05-14 01:44:02 +00:00
parent d600c96632
commit 8a75a69eaf
2 changed files with 17 additions and 1 deletions
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4
contrib/gcc/c-common.h
View File

@ -415,6 +415,10 @@ extern int warn_sequence_point;
extern int warn_missing_format_attribute;
/* Nonzero means do not warn that K&R style main() is not a function prototype. */
extern int flag_bsd_no_warn_kr_main;
/* Nonzero means warn about sizeof (function) or addition/subtraction
of function pointers. */

14
contrib/gcc/c-decl.c
View File

@ -379,6 +379,11 @@ int warn_traditional;
int warn_pointer_arith;
/* Nonzero means do not warn that K&R style main() is not a function prototype. */
int flag_bsd_no_warn_kr_main;
/* Nonzero means warn for non-prototype function decls
or non-prototyped defs without previous prototype. */
@ -531,6 +536,7 @@ c_decode_option (argc, argv)
flag_noniso_default_format_attributes = 0;
flag_isoc99 = 0;
flag_bsd_format = 0;
flag_bsd_no_warn_kr_main = 0;
}
else if (!strcmp (argstart, "iso9899:199409"))
{
@ -550,6 +556,7 @@ c_decode_option (argc, argv)
flag_isoc99 = 1;
flag_isoc94 = 1;
flag_bsd_format = 0;
flag_bsd_no_warn_kr_main = 0;
}
else if (!strcmp (argstart, "gnu89"))
{
@ -561,6 +568,7 @@ c_decode_option (argc, argv)
flag_isoc99 = 0;
flag_isoc94 = 0;
flag_bsd_format = 0;
flag_bsd_no_warn_kr_main = 0;
}
else if (!strcmp (argstart, "gnu9x") || !strcmp (argstart, "gnu99"))
{
@ -572,6 +580,7 @@ c_decode_option (argc, argv)
flag_isoc99 = 1;
flag_isoc94 = 1;
flag_bsd_format = 0;
flag_bsd_no_warn_kr_main = 0;
}
else if (!strcmp (argstart, "bsd"))
{
@ -584,6 +593,7 @@ c_decode_option (argc, argv)
flag_isoc94 = 0;
flag_isoc94 = 0;
flag_bsd_format = 1;
flag_bsd_no_warn_kr_main = 1;
}
else
error ("unknown C standard `%s'", argstart);
@ -6313,7 +6323,9 @@ start_function (declspecs, declarator, attributes)
&& !(old_decl != 0
&& (TYPE_ARG_TYPES (TREE_TYPE (old_decl)) != 0
|| (DECL_BUILT_IN (old_decl)
&& ! C_DECL_ANTICIPATED (old_decl)))))
&& ! C_DECL_ANTICIPATED (old_decl))))
&& !(flag_bsd_no_warn_kr_main && 0 ==
strcmp ("main", IDENTIFIER_POINTER (DECL_NAME (decl1)))))
warning ("function declaration isn't a prototype");
/* Optionally warn of any global def with no previous prototype. */
else if (warn_missing_prototypes