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(warn_missing_declarations): New variable.

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(c_decode_option): -Wmissing-declarations.
(start_function): Actually do the checking.

From-SVN: r6981
This commit is contained in:
Richard Kenner 1994-04-06 07:31:44 -04:00
parent 812fe08e5a
commit 1474fe4665
1 changed files with 23 additions and 1 deletions
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24
gcc/c-decl.c
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@ -484,6 +484,11 @@ int warn_strict_prototypes;
int warn_missing_prototypes;
/* Nonzero means warn for any global function def
without separate previous decl. */
int warn_missing_declarations;
/* Nonzero means warn about multiple (redundant) decls for the same single
variable or function. */
@ -627,6 +632,10 @@ c_decode_option (p)
warn_missing_prototypes = 1;
else if (!strcmp (p, "-Wno-missing-prototypes"))
warn_missing_prototypes = 0;
else if (!strcmp (p, "-Wmissing-declarations"))
warn_missing_declarations = 1;
else if (!strcmp (p, "-Wno-missing-declarations"))
warn_missing_declarations = 0;
else if (!strcmp (p, "-Wredundant-decls"))
warn_redundant_decls = 1;
else if (!strcmp (p, "-Wno-redundant-decls"))
@ -5832,7 +5841,20 @@ start_function (declspecs, declarator, nested)
else if (warn_missing_prototypes
&& old_decl != 0 && TREE_USED (old_decl)
&& !(old_decl != 0 && TYPE_ARG_TYPES (TREE_TYPE (old_decl)) != 0))
warning_with_decl (decl1, "`%s' was used with no prototype before its definition");
warning_with_decl (decl1,
"`%s' was used with no prototype before its definition");
/* Optionally warn of any global def with no previous declaration. */
else if (warn_missing_declarations
&& TREE_PUBLIC (decl1)
&& old_decl == 0
&& strcmp ("main", IDENTIFIER_POINTER (DECL_NAME (decl1))))
warning_with_decl (decl1, "no previous declaration for `%s'");
/* Optionally warn of any def with no previous declaration
if the function has already been used. */
else if (warn_missing_declarations
&& old_decl != 0 && TREE_USED (old_decl))
warning_with_decl (decl1,
"`%s' was used with no declaration before its definition");
/* This is a definition, not a reference.
So normally clear DECL_EXTERNAL.