/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
- Copyright (C) 1992 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 <stdio.h>
#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
#include "tree.h"
-#include "except.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"
+#include "target.h"
-#ifdef HANDLE_SYSV_PRAGMA
+#define GCC_BAD(msgid) do { warning (msgid); return; } while (0)
+#define GCC_BAD2(msgid, arg) do { warning (msgid, arg); return; } while (0)
-/* 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. */
+typedef struct align_stack GTY(())
+{
+ int alignment;
+ unsigned int num_pushes;
+ tree id;
+ struct align_stack * prev;
+} align_stack;
-extern int maximum_field_alignment;
+static GTY(()) struct align_stack * alignment_stack;
-/* File used for outputting assembler code. */
-extern FILE *asm_out_file;
+#ifdef HANDLE_PRAGMA_PACK
+static void handle_pragma_pack (cpp_reader *);
-/* Handle one token of a pragma directive. TOKEN is the
- current token, and STRING is its printable form. */
+#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))
-void
-handle_pragma_token (string, token)
- char *string;
- tree token;
+static void push_alignment (int, tree);
+static void pop_alignment (tree);
+
+/* Push an alignment value onto the stack. */
+static void
+push_alignment (int alignment, tree id)
+{
+ if (alignment_stack == NULL
+ || alignment_stack->alignment != alignment
+ || id != NULL_TREE)
+ {
+ align_stack * entry;
+
+ 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;
+ }
+ else
+ alignment_stack->num_pushes ++;
+}
+
+/* Undo a push of an alignment onto the stack. */
+static void
+pop_alignment (tree id)
{
- static enum pragma_state state = ps_start, type;
- static char *name;
- static char *value;
- static int align;
+ align_stack * entry;
+
+ if (alignment_stack == NULL)
+ {
+ warning ("\
+#pragma pack (pop) encountered without matching #pragma pack (push, <n>)"
+ );
+ return;
+ }
+
+ /* If we got an identifier, strip away everything above the target
+ entry so that the next step will restore the state just below it. */
+ if (id)
+ {
+ for (entry = alignment_stack; entry; entry = entry->prev)
+ if (entry->id == id)
+ {
+ entry->num_pushes = 1;
+ alignment_stack = entry;
+ break;
+ }
+ if (entry == NULL)
+ warning ("\
+#pragma pack(pop, %s) encountered without matching #pragma pack(push, %s, <n>)"
+ , IDENTIFIER_POINTER (id), IDENTIFIER_POINTER (id));
+ }
- if (string == 0)
+ if (-- alignment_stack->num_pushes == 0)
{
- if (type == ps_pack)
+ entry = alignment_stack->prev;
+
+ if (entry == NULL)
+ maximum_field_alignment = default_alignment;
+ else
+ maximum_field_alignment = entry->alignment;
+
+ alignment_stack = entry;
+ }
+}
+#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 */
+
+/* #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 * ARG_UNUSED (dummy))
+{
+ tree x, id = 0;
+ int align = -1;
+ enum cpp_ttype token;
+ enum { set, push, pop } action;
+
+ if (c_lex (&x) != CPP_OPEN_PAREN)
+ GCC_BAD ("missing '(' after '#pragma pack' - ignored");
+
+ token = c_lex (&x);
+ if (token == CPP_CLOSE_PAREN)
+ {
+ action = set;
+ align = 0;
+ }
+ else if (token == CPP_NUMBER)
+ {
+ 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);
+
+ token = c_lex (&x);
+ if (token != CPP_COMMA && action == push)
+ GCC_BAD_ACTION;
+
+ if (token == CPP_COMMA)
{
- if (state == ps_right)
- maximum_field_alignment = align * 8;
- else
- warning ("malformed `#pragma pack'");
+ token = c_lex (&x);
+ if (token == CPP_NAME)
+ {
+ id = x;
+ if (action == push && c_lex (&x) != CPP_COMMA)
+ GCC_BAD_ACTION;
+ token = c_lex (&x);
+ }
+
+ if (action == push)
+ {
+ if (token == CPP_NUMBER)
+ {
+ align = TREE_INT_CST_LOW (x);
+ token = c_lex (&x);
+ }
+ else
+ GCC_BAD_ACTION;
+ }
}
- else if (type == ps_weak)
- {
+
+ if (token != CPP_CLOSE_PAREN)
+ GCC_BAD_ACTION;
+#undef GCC_BAD_ACTION
+ }
+ 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)
+ {
+ case set: SET_GLOBAL_ALIGNMENT (align); break;
+ case push: push_alignment (align, id); break;
+ case pop: pop_alignment (id); break;
+ }
+}
+#endif /* HANDLE_PRAGMA_PACK */
+
+static GTY(()) tree pending_weaks;
+
#ifdef HANDLE_PRAGMA_WEAK
- if (HANDLE_PRAGMA_WEAK)
- handle_pragma_weak (state, name, value);
+static void apply_pragma_weak (tree, tree);
+static void handle_pragma_weak (cpp_reader *);
-#endif /* HANDLE_PRAMA_WEAK */
- }
+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);
+ }
+
+ 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);
+
+ declare_weak (decl);
+}
+
+void
+maybe_apply_pragma_weak (tree decl)
+{
+ tree *p, t, id;
+
+ /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
+
+ /* 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;
+
+ id = DECL_ASSEMBLER_NAME (decl);
+
+ 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;
+ }
+}
+
+/* #pragma weak name [= value] */
+static void
+handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy))
+{
+ tree name, value, x, decl;
+ enum cpp_ttype t;
+
+ value = 0;
- type = state = ps_start;
+ 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");
+
+ 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 ARG_UNUSED (decl))
+{
+}
+#endif /* HANDLE_PRAGMA_WEAK */
+
+/* GCC supports two #pragma directives for renaming the external
+ symbol associated with a declaration (DECL_ASSEMBLER_NAME), for
+ compatibility with the Solaris and Tru64 system headers. GCC also
+ has its own notation for this, __asm__("name") annotations.
+
+ Corner cases of these features and their interaction:
+
+ 1) Both pragmas silently apply only to declarations with external
+ linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels
+ do not have this restriction.
+
+ 2) In C++, both #pragmas silently apply only to extern "C" declarations.
+ Asm labels do not have this restriction.
+
+ 3) If any of the three ways of changing DECL_ASSEMBLER_NAME is
+ applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the
+ new name is different, a warning issues and the name does not change.
+
+ 4) The "source name" for #pragma redefine_extname is the DECL_NAME,
+ *not* the DECL_ASSEMBLER_NAME.
+
+ 5) If #pragma extern_prefix is in effect and a declaration occurs
+ with an __asm__ name, the #pragma extern_prefix is silently
+ ignored for that declaration.
+
+ 6) If #pragma extern_prefix and #pragma redefine_extname apply to
+ the same declaration, whichever triggered first wins, and a warning
+ is issued. (We would like to have #pragma redefine_extname always
+ win, but it can appear either before or after the declaration, and
+ if it appears afterward, we have no way of knowing whether a modified
+ DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */
+
+static GTY(()) tree pending_redefine_extname;
+
+static void handle_pragma_redefine_extname (cpp_reader *);
+
+/* #pragma redefine_extname oldname newname */
+static void
+handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy))
+{
+ tree oldname, newname, decl, x;
+ enum cpp_ttype t;
+
+ if (c_lex (&oldname) != CPP_NAME)
+ GCC_BAD ("malformed #pragma redefine_extname, ignored");
+ if (c_lex (&newname) != CPP_NAME)
+ GCC_BAD ("malformed #pragma redefine_extname, ignored");
+ t = c_lex (&x);
+ if (t != CPP_EOF)
+ warning ("junk at end of #pragma redefine_extname");
+
+ if (!flag_mudflap && !targetm.handle_pragma_redefine_extname)
+ {
+ if (warn_unknown_pragmas > in_system_header)
+ warning ("#pragma redefine_extname not supported on this target");
return;
}
- switch (state)
+ decl = identifier_global_value (oldname);
+ if (decl
+ && (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
+ && (TREE_CODE (decl) == FUNCTION_DECL
+ || TREE_CODE (decl) == VAR_DECL)
+ && has_c_linkage (decl))
{
- case ps_start:
- if (token && TREE_CODE (token) == IDENTIFIER_NODE)
+ if (DECL_ASSEMBLER_NAME_SET_P (decl))
{
- if (strcmp (IDENTIFIER_POINTER (token), "pack") == 0)
- type = state = ps_pack;
- else if (strcmp (IDENTIFIER_POINTER (token), "weak") == 0)
- type = state = ps_weak;
- else
- type = state = ps_done;
- }
- else
- type = state = ps_done;
- break;
+ const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+ name = targetm.strip_name_encoding (name);
- case ps_weak:
- if (token && TREE_CODE (token) == IDENTIFIER_NODE)
- {
- name = IDENTIFIER_POINTER (token);
- state = ps_name;
+ if (strcmp (name, IDENTIFIER_POINTER (newname)))
+ warning ("#pragma redefine_extname ignored due to conflict with "
+ "previous rename");
}
else
- state = ps_bad;
- break;
+ change_decl_assembler_name (decl, newname);
+ }
+ else
+ /* We have to add this to the rename list even if there's already
+ a global value that doesn't meet the above criteria, because in
+ C++ "struct foo {...};" puts "foo" in the current namespace but
+ does *not* conflict with a subsequent declaration of a function
+ or variable foo. See g++.dg/other/pragma-re-2.C. */
+ add_to_renaming_pragma_list (oldname, newname);
+}
- case ps_name:
- state = (strcmp (string, "=") ? ps_bad : ps_equals);
- break;
+/* This is called from here and from ia64.c. */
+void
+add_to_renaming_pragma_list (tree oldname, tree newname)
+{
+ tree previous = purpose_member (oldname, pending_redefine_extname);
+ if (previous)
+ {
+ if (TREE_VALUE (previous) != newname)
+ warning ("#pragma redefine_extname ignored due to conflict with "
+ "previous #pragma redefine_extname");
+ return;
+ }
+
+ pending_redefine_extname
+ = tree_cons (oldname, newname, pending_redefine_extname);
+}
- case ps_equals:
- if (token && TREE_CODE (token) == IDENTIFIER_NODE)
- {
- value = IDENTIFIER_POINTER (token);
- state = ps_value;
- }
- else
- state = ps_bad;
- break;
+static GTY(()) tree pragma_extern_prefix;
- case ps_value:
- state = ps_bad;
- break;
+/* #pragma extern_prefix "prefix" */
+static void
+handle_pragma_extern_prefix (cpp_reader * ARG_UNUSED (dummy))
+{
+ tree prefix, x;
+ enum cpp_ttype t;
- case ps_pack:
- if (strcmp (string, "(") == 0)
- state = ps_left;
- else
- state = ps_bad;
- break;
+ if (c_lex (&prefix) != CPP_STRING)
+ GCC_BAD ("malformed #pragma extern_prefix, ignored");
+ t = c_lex (&x);
+ if (t != CPP_EOF)
+ warning ("junk at end of #pragma extern_prefix");
+
+ if (targetm.handle_pragma_extern_prefix)
+ /* Note that the length includes the null terminator. */
+ pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL);
+ else if (warn_unknown_pragmas > in_system_header)
+ warning ("#pragma extern_prefix not supported on this target");
+}
+
+/* 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 *p, t;
+
+ /* The renaming pragmas are only applied to declarations with
+ external linkage. */
+ if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
+ || (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl))
+ || !has_c_linkage (decl))
+ return asmname;
+
+ /* If the DECL_ASSEMBLER_NAME is already set, it does not change,
+ but we may warn about a rename that conflicts. */
+ if (DECL_ASSEMBLER_NAME_SET_P (decl))
+ {
+ const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+ oldname = targetm.strip_name_encoding (oldname);
+
+ if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname))
+ warning ("asm declaration ignored due to "
+ "conflict with previous rename");
- case ps_left:
- if (token && TREE_CODE (token) == INTEGER_CST
- && TREE_INT_CST_HIGH (token) == 0)
- switch (TREE_INT_CST_LOW (token))
+ /* Take any pending redefine_extname off the list. */
+ for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
+ if (DECL_NAME (decl) == TREE_PURPOSE (t))
{
- case 1:
- case 2:
- case 4:
- align = TREE_INT_CST_LOW (token);
- state = ps_align;
+ /* Only warn if there is a conflict. */
+ if (strcmp (IDENTIFIER_POINTER (TREE_VALUE (t)), oldname))
+ warning ("#pragma redefine_extname ignored due to "
+ "conflict with previous rename");
+
+ *p = TREE_CHAIN (t);
break;
+ }
+ return 0;
+ }
- default:
- state = ps_bad;
+ /* Find out if we have a pending #pragma redefine_extname. */
+ for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
+ if (DECL_NAME (decl) == TREE_PURPOSE (t))
+ {
+ tree newname = TREE_VALUE (t);
+ *p = TREE_CHAIN (t);
+
+ /* If we already have an asmname, #pragma redefine_extname is
+ ignored (with a warning if it conflicts). */
+ if (asmname)
+ {
+ if (strcmp (TREE_STRING_POINTER (asmname),
+ IDENTIFIER_POINTER (newname)) != 0)
+ warning ("#pragma redefine_extname ignored due to "
+ "conflict with __asm__ declaration");
+ return asmname;
}
- else if (! token && strcmp (string, ")") == 0)
- {
- align = 0;
- state = ps_right;
- }
- else
- state = ps_bad;
- break;
- case ps_align:
- if (strcmp (string, ")") == 0)
- state = ps_right;
- else
- state = ps_bad;
- break;
+ /* Otherwise we use what we've got; #pragma extern_prefix is
+ silently ignored. */
+ return build_string (IDENTIFIER_LENGTH (newname),
+ IDENTIFIER_POINTER (newname));
+ }
+
+ /* If we've got an asmname, #pragma extern_prefix is silently ignored. */
+ if (asmname)
+ return asmname;
+
+ /* If #pragma extern_prefix is in effect, apply it. */
+ if (pragma_extern_prefix)
+ {
+ const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix);
+ size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1;
+
+ const char *id = IDENTIFIER_POINTER (DECL_NAME (decl));
+ size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl));
+
+ char *newname = (char *) alloca (plen + ilen + 1);
+
+ memcpy (newname, prefix, plen);
+ memcpy (newname + plen, id, ilen + 1);
+
+ return build_string (plen + ilen, newname);
+ }
+
+ /* Nada. */
+ return 0;
+}
- case ps_right:
- state = ps_bad;
- break;
- case ps_bad:
- case ps_done:
- break;
+#ifdef HANDLE_PRAGMA_VISIBILITY
+static void handle_pragma_visibility (cpp_reader *);
- default:
- abort ();
+/* Sets the default visibility for symbols to something other than that
+ specified on the command line. */
+static void
+handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED)
+{ /* Form is #pragma GCC visibility push(hidden)|pop */
+ static int visstack [16], visidx;
+ tree x;
+ enum cpp_ttype token;
+ enum { bad, push, pop } action = bad;
+
+ token = c_lex (&x);
+ if (token == CPP_NAME)
+ {
+ const char *op = IDENTIFIER_POINTER (x);
+ if (!strcmp (op, "push"))
+ action = push;
+ else if (!strcmp (op, "pop"))
+ action = pop;
+ }
+ if (bad == action)
+ GCC_BAD ("#pragma GCC visibility must be followed by push or pop");
+ else
+ {
+ if (pop == action)
+ {
+ if (!visidx)
+ {
+ GCC_BAD ("No matching push for '#pragma GCC visibility pop'");
+ }
+ else
+ {
+ default_visibility = visstack[--visidx];
+ visibility_options.inpragma = (visidx>0);
+ }
+ }
+ else
+ {
+ if (c_lex (&x) != CPP_OPEN_PAREN)
+ GCC_BAD ("missing '(' after '#pragma GCC visibility push' - ignored");
+ token = c_lex (&x);
+ if (token != CPP_NAME)
+ {
+ GCC_BAD ("malformed #pragma GCC visibility push");
+ }
+ else if (visidx >= 16)
+ {
+ GCC_BAD ("No more than sixteen #pragma GCC visibility pushes allowed at once");
+ }
+ else
+ {
+ const char *str = IDENTIFIER_POINTER (x);
+ visstack[visidx++] = default_visibility;
+ if (!strcmp (str, "default"))
+ default_visibility = VISIBILITY_DEFAULT;
+ else if (!strcmp (str, "internal"))
+ default_visibility = VISIBILITY_INTERNAL;
+ else if (!strcmp (str, "hidden"))
+ default_visibility = VISIBILITY_HIDDEN;
+ else if (!strcmp (str, "protected"))
+ default_visibility = VISIBILITY_PROTECTED;
+ else
+ {
+ GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected");
+ }
+ visibility_options.inpragma = 1;
+ }
+ if (c_lex (&x) != CPP_CLOSE_PAREN)
+ GCC_BAD ("missing '(' after '#pragma GCC visibility push' - ignored");
+ }
}
+ if (c_lex (&x) != CPP_EOF)
+ warning ("junk at end of '#pragma GCC visibility'");
+}
+
+#endif
+
+/* Front-end wrapper for pragma registration to avoid dragging
+ cpplib.h in almost everywhere. */
+void
+c_register_pragma (const char *space, const char *name,
+ void (*handler) (struct cpp_reader *))
+{
+ cpp_register_pragma (parse_in, space, name, handler);
}
-#endif /* HANDLE_SYSV_PRAGMA */
+
+/* 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_VISIBILITY
+ c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
+#endif
+
+ c_register_pragma (0, "redefine_extname", handle_pragma_redefine_extname);
+ c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
+
+ c_register_pragma ("GCC", "pch_preprocess", c_common_pch_pragma);
+
+#ifdef REGISTER_TARGET_PRAGMAS
+ REGISTER_TARGET_PRAGMAS ();
+#endif
+}
+
+#include "gt-c-pragma.h"
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