diff options
Diffstat (limited to 'gcc/c-decl.c')
| -rw-r--r-- | gcc/c-decl.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/gcc/c-decl.c b/gcc/c-decl.c index 0ffda691861..5399c175d82 100644 --- a/gcc/c-decl.c +++ b/gcc/c-decl.c @@ -109,6 +109,11 @@ static location_t current_function_prototype_locus; static GTY(()) tree current_function_arg_info; +/* The obstack on which parser and related data structures, which are + not live beyond their top-level declaration or definition, are + allocated. */ +struct obstack parser_obstack; + /* The current statement tree. */ static GTY(()) struct stmt_tree_s c_stmt_tree; @@ -2526,6 +2531,8 @@ c_init_decl_processing (void) current_function_decl = 0; + gcc_obstack_init (&parser_obstack); + /* Make the externals scope. */ push_scope (); external_scope = current_scope; @@ -6936,7 +6943,21 @@ c_write_global_declarations_1 (tree globals) /* Process the decls in the order they were written. */ for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl)) - vec[i] = decl; + { + vec[i] = decl; + /* Check for used but undefined static functions using the C + standard's definition of "used", and set TREE_NO_WARNING so + that check_global_declarations doesn't repeat the check. */ + if (TREE_CODE (decl) == FUNCTION_DECL + && DECL_INITIAL (decl) == 0 + && DECL_EXTERNAL (decl) + && !TREE_PUBLIC (decl) + && C_DECL_USED (decl)) + { + pedwarn ("%J%<%F%> used but never defined", decl, decl); + TREE_NO_WARNING (decl) = 1; + } + } wrapup_global_declarations (vec, len); check_global_declarations (vec, len); |
