/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
- Copyright (C) 1992, 1997, 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
#include "tree.h"
#include "function.h"
-#include "defaults.h"
+#include "cpplib.h"
#include "c-pragma.h"
#include "flags.h"
#include "toplev.h"
#include "ggc.h"
+#include "c-common.h"
+#include "output.h"
+#include "tm_p.h"
-#ifdef HANDLE_GENERIC_PRAGMAS
+#define GCC_BAD(msgid) do { warning (msgid); return; } while (0)
+#define GCC_BAD2(msgid, arg) do { warning (msgid, arg); return; } while (0)
-#ifdef HANDLE_PRAGMA_PACK
-/* When structure field packing is in effect, this variable is the
- number of bits to use as the maximum alignment. When packing is not
- in effect, this is zero. */
-
-extern int maximum_field_alignment;
-#endif
-
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
-typedef struct align_stack
+typedef struct align_stack GTY(())
{
int alignment;
unsigned int num_pushes;
struct align_stack * prev;
} align_stack;
-static struct align_stack * alignment_stack = NULL;
+static GTY(()) struct align_stack * alignment_stack;
-static int push_alignment PROTO((int, tree));
-static int pop_alignment PROTO((tree));
+#ifdef HANDLE_PRAGMA_PACK
+static void handle_pragma_pack (cpp_reader *);
+
+#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
+/* If we have a "global" #pragma pack(<n>) in effect when the first
+ #pragma pack(push,<n>) is encountered, this stores the value of
+ maximum_field_alignment in effect. When the final pop_alignment()
+ happens, we restore the value to this, not to a value of 0 for
+ maximum_field_alignment. Value is in bits. */
+static int default_alignment;
+#define SET_GLOBAL_ALIGNMENT(ALIGN) \
+ (default_alignment = maximum_field_alignment = (ALIGN))
+
+static void push_alignment (int, tree);
+static void pop_alignment (tree);
/* Push an alignment value onto the stack. */
-static int
-push_alignment (alignment, id)
- int alignment;
- tree id;
+static void
+push_alignment (int alignment, tree id)
{
- switch (alignment)
- {
- case 0:
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- break;
- default:
- warning ("\
-Alignment must be a small power of two, not %d, in #pragma pack",
- alignment);
- return 0;
- }
-
if (alignment_stack == NULL
|| alignment_stack->alignment != alignment
|| id != NULL_TREE)
{
align_stack * entry;
- entry = (align_stack *) xmalloc (sizeof (* entry));
-
- if (entry == NULL)
- {
- warning ("Out of memory pushing #pragma pack");
- return 0;
- }
+ entry = ggc_alloc (sizeof (* entry));
entry->alignment = alignment;
entry->num_pushes = 1;
entry->id = id;
entry->prev = alignment_stack;
+ /* The current value of maximum_field_alignment is not necessarily
+ 0 since there may be a #pragma pack(<n>) in effect; remember it
+ so that we can restore it after the final #pragma pop(). */
+ if (alignment_stack == NULL)
+ default_alignment = maximum_field_alignment;
+
alignment_stack = entry;
- maximum_field_alignment = alignment * 8;
+ maximum_field_alignment = alignment;
}
else
alignment_stack->num_pushes ++;
-
- return 1;
}
/* Undo a push of an alignment onto the stack. */
-static int
-pop_alignment (id)
- tree id;
+static void
+pop_alignment (tree id)
{
align_stack * entry;
warning ("\
#pragma pack (pop) encountered without matching #pragma pack (push, <n>)"
);
- return 0;
+ return;
}
/* If we got an identifier, strip away everything above the target
entry = alignment_stack->prev;
if (entry == NULL)
- maximum_field_alignment = 0;
+ maximum_field_alignment = default_alignment;
else
- maximum_field_alignment = entry->alignment * 8;
-
- free (alignment_stack);
+ maximum_field_alignment = entry->alignment;
alignment_stack = entry;
}
-
- return 1;
}
+#else /* not HANDLE_PRAGMA_PACK_PUSH_POP */
+#define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = (ALIGN))
+#define push_alignment(ID, N) \
+ GCC_BAD("#pragma pack(push[, id], <n>) is not supported on this target")
+#define pop_alignment(ID) \
+ GCC_BAD("#pragma pack(pop[, id], <n>) is not supported on this target")
+#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-/* Generate 'packed' and 'aligned' attributes for decls whilst a
- #pragma pack(push... is in effect. */
-void
-insert_pack_attributes (node, attributes, prefix)
- tree node;
- tree * attributes;
- tree * prefix;
+/* #pragma pack ()
+ #pragma pack (N)
+
+ #pragma pack (push, N)
+ #pragma pack (push, ID, N)
+ #pragma pack (pop)
+ #pragma pack (pop, ID) */
+static void
+handle_pragma_pack (cpp_reader *dummy ATTRIBUTE_UNUSED)
{
- tree a;
- int field_alignment;
+ tree x, id = 0;
+ int align = -1;
+ enum cpp_ttype token;
+ enum { set, push, pop } action;
- /* If we are not packing, then there is nothing to do. */
- if (maximum_field_alignment == 0
- || alignment_stack == NULL)
- return;
+ if (c_lex (&x) != CPP_OPEN_PAREN)
+ GCC_BAD ("missing '(' after '#pragma pack' - ignored");
- /* We are only interested in fields. */
- if (TREE_CODE_CLASS (TREE_CODE (node)) != 'd'
- || TREE_CODE (node) != FIELD_DECL)
- return;
-
- field_alignment = TYPE_ALIGN (TREE_TYPE (node));
- if (field_alignment <= 0 || field_alignment > maximum_field_alignment)
- field_alignment = maximum_field_alignment;
-
- /* Add a 'packed' attribute. */
- * attributes = tree_cons (get_identifier ("packed"), NULL, * attributes);
-
- /* If the alignment is > 8 then add an alignment attribute as well. */
- if (field_alignment > 8)
+ token = c_lex (&x);
+ if (token == CPP_CLOSE_PAREN)
{
- /* If the aligned attribute is already present then do not override it. */
- for (a = * attributes; a; a = TREE_CHAIN (a))
- {
- tree name = TREE_PURPOSE (a);
- if (strcmp (IDENTIFIER_POINTER (name), "aligned") == 0)
- break;
- }
-
- if (a == NULL)
- for (a = * prefix; a; a = TREE_CHAIN (a))
- {
- tree name = TREE_PURPOSE (a);
- if (strcmp (IDENTIFIER_POINTER (name), "aligned") == 0)
- break;
- }
-
- if (a == NULL)
- {
- * attributes = tree_cons
- (get_identifier ("aligned"),
- tree_cons (NULL,
- build_int_2 (field_alignment / 8, 0),
- NULL),
- * attributes);
- }
+ action = set;
+ align = 0;
}
-
- return;
-}
-#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-\f
-/* Handle one token of a pragma directive. TOKEN is the current token, and
- STRING is its printable form. Some front ends do not support generating
- tokens, and will only pass in a STRING. Also some front ends will reuse
- the buffer containing STRING, so it must be copied to a local buffer if
- it needs to be preserved.
-
- If STRING is non-NULL, then the return value will be ignored, and there
- will be futher calls to handle_pragma_token() in order to handle the rest of
- the line containing the #pragma directive. If STRING is NULL, the entire
- line has now been presented to handle_pragma_token() and the return value
- should be zero if the pragma flawed in some way, or if the pragma was not
- recognised, and non-zero if it was successfully handled. */
-
-int
-handle_pragma_token (string, token)
- const char * string;
- tree token;
-{
- static enum pragma_state state = ps_start;
- static enum pragma_state type;
-#ifdef HANDLE_PRAGMA_WEAK
- static char * name;
- static char * value;
-#endif
-#if defined(HANDLE_PRAGMA_PACK) || defined(HANDLE_PRAGMA_PACK_PUSH_POP)
- static int align;
-#endif
- static tree id;
-
- /* If we have reached the end of the #pragma directive then
- determine what value we should return. */
-
- if (string == NULL)
+ else if (token == CPP_NUMBER)
{
- int ret_val = 0;
+ align = TREE_INT_CST_LOW (x);
+ action = set;
+ if (c_lex (&x) != CPP_CLOSE_PAREN)
+ GCC_BAD ("malformed '#pragma pack' - ignored");
+ }
+ else if (token == CPP_NAME)
+ {
+#define GCC_BAD_ACTION do { if (action == push) \
+ GCC_BAD ("malformed '#pragma pack(push[, id], <n>)' - ignored"); \
+ else \
+ GCC_BAD ("malformed '#pragma pack(pop[, id])' - ignored"); \
+ } while (0)
+
+ const char *op = IDENTIFIER_POINTER (x);
+ if (!strcmp (op, "push"))
+ action = push;
+ else if (!strcmp (op, "pop"))
+ action = pop;
+ else
+ GCC_BAD2 ("unknown action '%s' for '#pragma pack' - ignored", op);
- switch (type)
+ token = c_lex (&x);
+ if (token != CPP_COMMA && action == push)
+ GCC_BAD_ACTION;
+
+ if (token == CPP_COMMA)
{
- default:
- abort ();
- break;
-
- case ps_done:
- /* The pragma was not recognised. */
- break;
-
-#ifdef HANDLE_PRAGMA_PACK
- case ps_pack:
- if (state == ps_right)
+ token = c_lex (&x);
+ if (token == CPP_NAME)
{
- maximum_field_alignment = align * 8;
- ret_val = 1;
+ id = x;
+ if (action == push && c_lex (&x) != CPP_COMMA)
+ GCC_BAD_ACTION;
+ token = c_lex (&x);
}
- else
- warning ("malformed `#pragma pack'");
- break;
-#endif /* HANDLE_PRAGMA_PACK */
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- case ps_push:
- if (state == ps_right)
- ret_val = push_alignment (align, id);
- else
- warning ("malformed '#pragma pack(push[,id],<n>)'");
- break;
-
- case ps_pop:
- if (state == ps_right)
- ret_val = pop_alignment (id);
- else
- warning ("malformed '#pragma pack(pop[,id])'");
- break;
-#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-
-#ifdef HANDLE_PRAGMA_WEAK
- case ps_weak:
- if (HANDLE_PRAGMA_WEAK)
+
+ if (action == push)
{
- if (state == ps_name)
- ret_val = add_weak (name, NULL);
- else if (state == ps_value)
- ret_val = add_weak (name, value);
+ if (token == CPP_NUMBER)
+ {
+ align = TREE_INT_CST_LOW (x);
+ token = c_lex (&x);
+ }
else
- warning ("malformed `#pragma weak'");
+ GCC_BAD_ACTION;
}
- else
- ret_val = 1; /* Ignore the pragma. */
- break;
-#endif /* HANDLE_PRAGMA_WEAK */
-
- case ps_poison:
- ret_val = 1;
- break;
}
- type = state = ps_start;
- id = NULL_TREE;
-
- return ret_val;
+ if (token != CPP_CLOSE_PAREN)
+ GCC_BAD_ACTION;
+#undef GCC_BAD_ACTION
}
-
- /* If we have been given a token, but it is not an identifier,
- or a small constant, then something has gone wrong. */
- if (token)
+ else
+ GCC_BAD ("malformed '#pragma pack' - ignored");
+
+ if (c_lex (&x) != CPP_EOF)
+ warning ("junk at end of '#pragma pack'");
+
+ if (action != pop)
+ switch (align)
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ case 16:
+ align *= BITS_PER_UNIT;
+ break;
+ default:
+ GCC_BAD2 ("alignment must be a small power of two, not %d", align);
+ }
+
+ switch (action)
{
- switch (TREE_CODE (token))
- {
- case IDENTIFIER_NODE:
- break;
-
- case INTEGER_CST:
- if (TREE_INT_CST_HIGH (token) != 0)
- return 0;
- break;
-
- default:
- return 0;
- }
+ case set: SET_GLOBAL_ALIGNMENT (align); break;
+ case push: push_alignment (align, id); break;
+ case pop: pop_alignment (id); break;
}
-
- switch (state)
- {
- case ps_start:
- type = state = ps_done;
-#ifdef HANDLE_PRAGMA_PACK
- if (strcmp (string, "pack") == 0)
- type = state = ps_pack;
-#endif
-#ifdef HANDLE_PRAGMA_WEAK
- if (strcmp (string, "weak") == 0)
- type = state = ps_weak;
-#endif
- if (strcmp (string, "poison") == 0)
- type = state = ps_poison;
- break;
+}
+#endif /* HANDLE_PRAGMA_PACK */
+
+static GTY(()) tree pending_weaks;
#ifdef HANDLE_PRAGMA_WEAK
- case ps_weak:
- name = permalloc (strlen (string) + 1);
- if (name == NULL)
- {
- warning ("Out of memory parsing #pragma weak");
- state = ps_bad;
- }
- else
- {
- strcpy (name, string);
- state = ps_name;
- }
- break;
-
- case ps_name:
- state = (strcmp (string, "=") ? ps_bad : ps_equals);
- break;
+static void apply_pragma_weak (tree, tree);
+static void handle_pragma_weak (cpp_reader *);
- case ps_equals:
- value = permalloc (strlen (string) + 1);
- if (value == NULL)
- {
- warning ("Out of memory parsing #pragma weak");
- state = ps_bad;
- }
- else
- {
- strcpy (value, string);
- state = ps_value;
- }
- break;
+static void
+apply_pragma_weak (tree decl, tree value)
+{
+ if (value)
+ {
+ value = build_string (IDENTIFIER_LENGTH (value),
+ IDENTIFIER_POINTER (value));
+ decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
+ build_tree_list (NULL, value)),
+ 0);
+ }
- case ps_value:
- state = ps_bad;
- break;
-#endif /* HANDLE_PRAGMA_WEAK */
-
-#ifdef HANDLE_PRAGMA_PACK
- case ps_pack:
- state = (strcmp (string, "(") ? ps_bad : ps_left);
- break;
+ if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
+ && !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */
+ && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
+ warning ("%Japplying #pragma weak '%D' after first use results "
+ "in unspecified behavior", decl, decl);
- case ps_left:
+ declare_weak (decl);
+}
- if (token == NULL_TREE)
- {
- /* #pragma pack () resets packing rules to their
- defaults. */
- if (strcmp (string, ")") == 0)
- {
- align = 0;
- state = ps_right;
- }
- else
- state = ps_bad;
- }
- else if (TREE_CODE (token) == INTEGER_CST)
- goto handle_align;
+void
+maybe_apply_pragma_weak (tree decl)
+{
+ tree *p, t, id;
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- else if (TREE_CODE (token) == IDENTIFIER_NODE)
- {
- if (strcmp (string, "push") == 0)
- type = state = ps_push;
- else if (strcmp (string, "pop") == 0)
- type = state = ps_pop;
- else
- state = ps_bad;
- }
-#endif
- else
- state = ps_bad;
- break;
+ /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
- handle_align:
- align = TREE_INT_CST_LOW (token);
- switch (align)
- {
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- state = ps_align;
- break;
-
- default:
- state = ps_bad;
- break;
- }
- break;
+ /* No weak symbols pending, take the short-cut. */
+ if (!pending_weaks)
+ return;
+ /* If it's not visible outside this file, it doesn't matter whether
+ it's weak. */
+ if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
+ return;
+ /* If it's not a function or a variable, it can't be weak.
+ FIXME: what kinds of things are visible outside this file but
+ aren't functions or variables? Should this be an abort() instead? */
+ if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
+ return;
- case ps_align:
- state = (strcmp (string, ")") ? ps_bad : ps_right);
- break;
+ id = DECL_ASSEMBLER_NAME (decl);
- case ps_right:
- state = ps_bad;
- break;
-#endif /* HANDLE_PRAGMA_PACK */
+ for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t))
+ if (id == TREE_PURPOSE (t))
+ {
+ apply_pragma_weak (decl, TREE_VALUE (t));
+ *p = TREE_CHAIN (t);
+ break;
+ }
+}
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- case ps_push:
- state = (strcmp (string, ",") ? ps_bad : ps_pushcomma);
- break;
+/* #pragma weak name [= value] */
+static void
+handle_pragma_weak (cpp_reader *dummy ATTRIBUTE_UNUSED)
+{
+ tree name, value, x, decl;
+ enum cpp_ttype t;
- case ps_pushid:
- state = (strcmp (string, ",") ? ps_bad : ps_pushcomma2);
- break;
+ value = 0;
- case ps_pushcomma:
- if (token && TREE_CODE (token) == IDENTIFIER_NODE)
- {
- id = token;
- state = ps_pushid;
- break;
- }
+ if (c_lex (&name) != CPP_NAME)
+ GCC_BAD ("malformed #pragma weak, ignored");
+ t = c_lex (&x);
+ if (t == CPP_EQ)
+ {
+ if (c_lex (&value) != CPP_NAME)
+ GCC_BAD ("malformed #pragma weak, ignored");
+ t = c_lex (&x);
+ }
+ if (t != CPP_EOF)
+ warning ("junk at end of #pragma weak");
- /* else fall through */
- case ps_pushcomma2:
- if (token && TREE_CODE (token) == INTEGER_CST)
- goto handle_align;
- else
- state = ps_bad;
- break;
+ decl = identifier_global_value (name);
+ if (decl && TREE_CODE_CLASS (TREE_CODE (decl)) == 'd')
+ {
+ apply_pragma_weak (decl, value);
+ if (value)
+ assemble_alias (decl, value);
+ }
+ else
+ pending_weaks = tree_cons (name, value, pending_weaks);
+}
+#else
+void
+maybe_apply_pragma_weak (tree decl ATTRIBUTE_UNUSED)
+{
+}
+#endif /* HANDLE_PRAGMA_WEAK */
- case ps_pop:
- if (strcmp (string, ",") == 0)
- state = ps_popcomma;
- else
- state = (strcmp (string, ")") ? ps_bad : ps_right);
- break;
+static GTY(()) tree pending_redefine_extname;
- case ps_popcomma:
- if (token && TREE_CODE (token) == IDENTIFIER_NODE)
- {
- id = token;
- state = ps_align;
- }
- else
- state = ps_bad;
- break;
-#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
+static void handle_pragma_redefine_extname (cpp_reader *);
- case ps_poison:
- if (token && TREE_CODE (token) != IDENTIFIER_NODE)
- state = ps_bad;
- break;
+/* #pragma redefined_extname oldname newname */
+static void
+handle_pragma_redefine_extname (cpp_reader *dummy ATTRIBUTE_UNUSED)
+{
+ tree oldname, newname, decl, x;
+ enum cpp_ttype t;
- case ps_bad:
- case ps_done:
- break;
+ if (c_lex (&oldname) != CPP_NAME)
+ {
+ warning ("malformed #pragma redefine_extname, ignored");
+ return;
+ }
+ if (c_lex (&newname) != CPP_NAME)
+ {
+ warning ("malformed #pragma redefine_extname, ignored");
+ return;
+ }
+ t = c_lex (&x);
+ if (t != CPP_EOF)
+ warning ("junk at end of #pragma redefine_extname");
- default:
- abort ();
+ decl = identifier_global_value (oldname);
+ if (decl && (TREE_CODE (decl) == FUNCTION_DECL
+ || TREE_CODE (decl) == VAR_DECL))
+ {
+ if (DECL_ASSEMBLER_NAME_SET_P (decl)
+ && DECL_ASSEMBLER_NAME (decl) != newname)
+ warning ("#pragma redefine_extname conflicts with declaration");
+ change_decl_assembler_name (decl, newname);
}
+ else
+ add_to_renaming_pragma_list(oldname, newname);
+}
- return 1;
+void
+add_to_renaming_pragma_list (tree oldname, tree newname)
+{
+ pending_redefine_extname
+ = tree_cons (oldname, newname, pending_redefine_extname);
}
-#endif /* HANDLE_GENERIC_PRAGMAS */
-\f
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
+
+static GTY(()) tree pragma_extern_prefix;
+
+#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
+static void handle_pragma_extern_prefix (cpp_reader *);
+
+/* #pragma extern_prefix "prefix" */
static void
-mark_align_stack (p)
- void *p;
+handle_pragma_extern_prefix (cpp_reader *dummy ATTRIBUTE_UNUSED)
{
- align_stack *a = (align_stack *) p;
+ tree prefix, x;
+ enum cpp_ttype t;
- while (a)
+ if (c_lex (&prefix) != CPP_STRING)
{
- ggc_mark_tree (a->id);
- a = a->prev;
+ warning ("malformed #pragma extern_prefix, ignored");
+ return;
}
+ t = c_lex (&x);
+ if (t != CPP_EOF)
+ warning ("junk at end of #pragma extern_prefix");
+
+ /* Note that the length includes the null terminator. */
+ pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL);
}
#endif
+/* Hook from the front ends to apply the results of one of the preceding
+ pragmas that rename variables. */
+
+tree
+maybe_apply_renaming_pragma (tree decl, tree asmname)
+{
+ tree oldname;
+
+ /* Copied from the check in set_decl_assembler_name. */
+ if (TREE_CODE (decl) == FUNCTION_DECL
+ || (TREE_CODE (decl) == VAR_DECL
+ && (TREE_STATIC (decl)
+ || DECL_EXTERNAL (decl)
+ || TREE_PUBLIC (decl))))
+ oldname = DECL_ASSEMBLER_NAME (decl);
+ else
+ return asmname;
+
+ /* If the name begins with a *, that's a sign of an asmname attached to
+ a previous declaration. */
+ if (IDENTIFIER_POINTER (oldname)[0] == '*')
+ {
+ const char *oldasmname = IDENTIFIER_POINTER (oldname) + 1;
+ if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldasmname) != 0)
+ warning ("asm declaration conflicts with previous rename");
+ asmname = build_string (strlen (oldasmname), oldasmname);
+ }
+
+ {
+ tree *p, t;
+
+ for (p = &pending_redefine_extname; (t = *p) ; p = &TREE_CHAIN (t))
+ if (oldname == TREE_PURPOSE (t))
+ {
+ const char *newname = IDENTIFIER_POINTER (TREE_VALUE (t));
+
+ if (asmname && strcmp (TREE_STRING_POINTER (asmname), newname) != 0)
+ warning ("#pragma redefine_extname conflicts with declaration");
+ *p = TREE_CHAIN (t);
+
+ return build_string (strlen (newname), newname);
+ }
+ }
+
+#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
+ if (pragma_extern_prefix && !asmname)
+ {
+ char *x = concat (TREE_STRING_POINTER (pragma_extern_prefix),
+ IDENTIFIER_POINTER (oldname), NULL);
+ asmname = build_string (strlen (x), x);
+ free (x);
+ return asmname;
+ }
+#endif
+
+ return asmname;
+}
+
+/* Front-end wrapper for pragma registration to avoid dragging
+ cpplib.h in almost everywhere. */
void
-init_pragma ()
+c_register_pragma (const char *space, const char *name,
+ void (*handler) (struct cpp_reader *))
{
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- ggc_add_root (&alignment_stack, 1, sizeof(alignment_stack),
- mark_align_stack);
+ cpp_register_pragma (parse_in, space, name, handler);
+}
+
+/* Set up front-end pragmas. */
+void
+init_pragma (void)
+{
+#ifdef HANDLE_PRAGMA_PACK
+ c_register_pragma (0, "pack", handle_pragma_pack);
+#endif
+#ifdef HANDLE_PRAGMA_WEAK
+ c_register_pragma (0, "weak", handle_pragma_weak);
+#endif
+#ifdef HANDLE_PRAGMA_REDEFINE_EXTNAME
+ c_register_pragma (0, "redefine_extname", handle_pragma_redefine_extname);
+#else
+ if (flag_mudflap)
+ c_register_pragma (0, "redefine_extname", handle_pragma_redefine_extname);
+#endif
+#ifdef HANDLE_PRAGMA_EXTERN_PREFIX
+ c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
+#endif
+
+#ifdef REGISTER_TARGET_PRAGMAS
+ REGISTER_TARGET_PRAGMAS ();
#endif
}
+
+#include "gt-c-pragma.h"
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