diff options
author | Marc Espie <espie@cvs.openbsd.org> | 2003-06-04 12:44:50 +0000 |
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committer | Marc Espie <espie@cvs.openbsd.org> | 2003-06-04 12:44:50 +0000 |
commit | a6c0633f2e8c08605a881bfdb9073573c3965201 (patch) | |
tree | 68b28201526757db58ac7cae7a161097b023f578 /gnu | |
parent | 9ba55d45240cc67881c516a351c12c37f1b591e5 (diff) |
Recgonize -fno-builtin-<function>
okay tdeval, fries, tdeval, millert...
Diffstat (limited to 'gnu')
-rw-r--r-- | gnu/egcs/gcc/c-decl.c | 68 |
1 files changed, 61 insertions, 7 deletions
diff --git a/gnu/egcs/gcc/c-decl.c b/gnu/egcs/gcc/c-decl.c index f6e4f8df320..1f9aad01ae2 100644 --- a/gnu/egcs/gcc/c-decl.c +++ b/gnu/egcs/gcc/c-decl.c @@ -599,6 +599,19 @@ int warn_multichar = 1; #endif int dollars_in_ident = DOLLARS_IN_IDENTIFIERS; + +/* Linked list of disabled built-in functions. */ + +typedef struct disabled_builtin +{ + const char *name; + struct disabled_builtin *next; +} disabled_builtin; +static disabled_builtin *disabled_builtins = NULL; + +static int builtin_function_disabled_p PROTO ((const char *)); +void disable_builtin_function PROTO ((const char *)); + /* Decode the string P as a language-specific option for C. Return the number of strings consumed. */ @@ -741,6 +754,8 @@ c_decode_option (argc, argv) flag_no_builtin = 0; else if (!strcmp (p, "-fno-builtin")) flag_no_builtin = 1; + else if (!strncmp (p, "-fno-builtin-", strlen ("-fno-builtin-"))) + disable_builtin_function (p + strlen ("-fno-builtin-")); else if (!strcmp (p, "-ansi")) goto iso_1990; else if (!strcmp (p, "-Werror-implicit-function-declaration")) @@ -3411,16 +3426,20 @@ init_decl_processing () endlink)), BUILT_IN_ALLOCA, NULL_PTR); /* Suppress error if redefined as a non-function. */ - DECL_BUILT_IN_NONANSI (temp) = 1; + if (temp) + DECL_BUILT_IN_NONANSI (temp) = 1; temp = builtin_function ("ffs", int_ftype_int, BUILT_IN_FFS, NULL_PTR); /* Suppress error if redefined as a non-function. */ - DECL_BUILT_IN_NONANSI (temp) = 1; + if (temp) + DECL_BUILT_IN_NONANSI (temp) = 1; temp = builtin_function ("_exit", void_ftype_any, NOT_BUILT_IN, NULL_PTR); - TREE_THIS_VOLATILE (temp) = 1; - TREE_SIDE_EFFECTS (temp) = 1; - /* Suppress error if redefined as a non-function. */ - DECL_BUILT_IN_NONANSI (temp) = 1; + if (temp) { + TREE_THIS_VOLATILE (temp) = 1; + TREE_SIDE_EFFECTS (temp) = 1; + /* Suppress error if redefined as a non-function. */ + DECL_BUILT_IN_NONANSI (temp) = 1; + } } builtin_function ("__builtin_abs", int_ftype_int, BUILT_IN_ABS, NULL_PTR); @@ -3610,6 +3629,38 @@ init_decl_processing () lang_get_alias_set = c_get_alias_set; } +/* Disable a built-in function specified by -fno-builtin-NAME. If NAME + begins with "__builtin_", give an error. */ + +void +disable_builtin_function (name) + const char *name; +{ + if (strncmp (name, "__builtin_", strlen ("__builtin_")) == 0) + error ("cannot disable built-in function `%s'", name); + else + { + disabled_builtin *new = xmalloc (sizeof (disabled_builtin)); + new->name = name; + new->next = disabled_builtins; + disabled_builtins = new; + } +} + + +static int +builtin_function_disabled_p (name) + const char *name; +{ + disabled_builtin *p; + for (p = disabled_builtins; p != NULL; p = p->next) + { + if (strcmp (name, p->name) == 0) + return 1; + } + return 0; +} + /* Return a definition for a builtin function named NAME and whose data type is TYPE. TYPE should be a function type with argument types. FUNCTION_CODE tells later passes how to compile calls to this function. @@ -3625,7 +3676,10 @@ builtin_function (name, type, function_code, library_name) enum built_in_function function_code; const char *library_name; { - tree decl = build_decl (FUNCTION_DECL, get_identifier (name), type); + tree decl; + if (builtin_function_disabled_p (name)) + return NULL; + decl = build_decl (FUNCTION_DECL, get_identifier (name), type); DECL_EXTERNAL (decl) = 1; TREE_PUBLIC (decl) = 1; /* If -traditional, permit redefining a builtin function any way you like. |