+++ /dev/null
-diff -aur gcc-3.4.0orig/gcc/c-common.c gcc-3.4.0/gcc/c-common.c
---- gcc-3.4.0orig/gcc/c-common.c 2004-03-19 01:32:59.000000000 +0000
-+++ gcc-3.4.0/gcc/c-common.c 2004-05-10 21:05:33.000000000 +0100
-@@ -833,7 +833,7 @@
- handle_deprecated_attribute },
- { "vector_size", 1, 1, false, true, false,
- handle_vector_size_attribute },
-- { "visibility", 1, 1, true, false, false,
-+ { "visibility", 1, 1, false, false, false,
- handle_visibility_attribute },
- { "tls_model", 1, 1, true, false, false,
- handle_tls_model_attribute },
-@@ -4886,7 +4886,16 @@
-
- *no_add_attrs = true;
-
-- if (decl_function_context (decl) != 0 || ! TREE_PUBLIC (decl))
-+ if (TYPE_P (*node))
-+ {
-+ if (TREE_CODE (*node) != RECORD_TYPE && TREE_CODE (*node) != UNION_TYPE)
-+ {
-+ warning ("`%s' attribute ignored on non-class types",
-+ IDENTIFIER_POINTER (name));
-+ return NULL_TREE;
-+ }
-+ }
-+ else if (decl_function_context (decl) != 0 || ! TREE_PUBLIC (decl))
- {
- warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
- return NULL_TREE;
-@@ -4897,6 +4906,14 @@
- error ("visibility arg not a string");
- return NULL_TREE;
- }
-+
-+ /* If this is a type, set the visibility on the type decl. */
-+ if (TYPE_P (decl))
-+ {
-+ decl = TYPE_NAME (decl);
-+ if (! decl)
-+ return NULL_TREE;
-+ }
-
- if (strcmp (TREE_STRING_POINTER (id), "default") == 0)
- DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
-@@ -4908,6 +4925,14 @@
- DECL_VISIBILITY (decl) = VISIBILITY_PROTECTED;
- else
- error ("visibility arg must be one of \"default\", \"hidden\", \"protected\" or \"internal\"");
-+ DECL_VISIBILITYSPECIFIED (decl) = 1;
-+
-+ /* For decls only, go ahead and attach the attribute to the node as well.
-+ This is needed so we can determine whether we have VISIBILITY_DEFAULT
-+ because the visibility was not specified, or because it was explicitly
-+ overridden from the class visibility. */
-+ if (DECL_P (*node))
-+ *no_add_attrs = false;
-
- return NULL_TREE;
- }
-
-diff -aur gcc-3.4.0orig/gcc/c-decl.c gcc-3.4.0/gcc/c-decl.c
---- gcc-3.4.0orig/gcc/c-decl.c 2004-03-22 17:58:18.000000000 +0000
-+++ gcc-3.4.0/gcc/c-decl.c 2004-05-10 15:16:27.000000000 +0100
-@@ -1164,9 +1164,8 @@
- }
-
- /* warnings */
-- /* All decls must agree on a non-default visibility. */
-- if (DECL_VISIBILITY (newdecl) != VISIBILITY_DEFAULT
-- && DECL_VISIBILITY (olddecl) != VISIBILITY_DEFAULT
-+ /* All decls must agree on a visibility. */
-+ if (DECL_VISIBILITYSPECIFIED (newdecl) && DECL_VISIBILITYSPECIFIED (olddecl)
- && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
- {
- warning ("%Jredeclaration of '%D' with different visibility "
-@@ -1361,9 +1360,12 @@
- Currently, it can only be defined in the prototype. */
- COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
-
-- /* If either declaration has a nondefault visibility, use it. */
-- if (DECL_VISIBILITY (olddecl) != VISIBILITY_DEFAULT)
-- DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
-+ /* Use visibility of whichever declaration had it specified */
-+ if (DECL_VISIBILITYSPECIFIED (olddecl))
-+ {
-+ DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
-+ DECL_VISIBILITYSPECIFIED (newdecl) = 1;
-+ }
-
- if (TREE_CODE (newdecl) == FUNCTION_DECL)
- {
-
-diff -aur gcc-3.4.0orig/gcc/common.opt gcc-3.4.0/gcc/common.opt
---- gcc-3.4.0orig/gcc/common.opt 2004-02-18 00:09:04.000000000 +0000
-+++ gcc-3.4.0/gcc/common.opt 2004-05-09 08:10:50.000000000 +0100
-@@ -718,6 +718,11 @@
- Common
- Add extra commentary to assembler output
-
-+fvisibility=
-+Common Joined RejectNegative
-+-fvisibility=[default|internal|hidden|protected] Set the default symbol visibility
-+
-+
- fvpt
- Common
- Use expression value profiles in optimizations
-
-diff -aur gcc-3.4.0orig/gcc/c.opt gcc-3.4.0/gcc/c.opt
---- gcc-3.4.0orig/gcc/c.opt 2004-02-18 00:09:03.000000000 +0000
-+++ gcc-3.4.0/gcc/c.opt 2004-05-09 08:10:50.000000000 +0100
-@@ -656,6 +656,10 @@
- C++ ObjC++
- Use __cxa_atexit to register destructors
-
-+fvisibility-inlines-hidden
-+C++
-+Marks all inlined methods as having hidden visibility
-+
- fvtable-gc
- C++ ObjC++
- Discard unused virtual functions
-diff -aur gcc-3.4.0orig/gcc/c-opts.c gcc-3.4.0/gcc/c-opts.c
---- gcc-3.4.0orig/gcc/c-opts.c 2004-02-18 00:09:03.000000000 +0000
-+++ gcc-3.4.0/gcc/c-opts.c 2004-05-09 08:10:50.000000000 +0100
-@@ -912,6 +912,10 @@
- case OPT_fuse_cxa_atexit:
- flag_use_cxa_atexit = value;
- break;
-+
-+ case OPT_fvisibility_inlines_hidden:
-+ visibility_options.inlineshidden = value;
-+ break;
-
- case OPT_fweak:
- flag_weak = value;
-
-diff -aur gcc-3.4.0orig/gcc/cp/class.c gcc-3.4.0/gcc/cp/class.c
---- gcc-3.4.0orig/gcc/cp/class.c 2004-03-09 07:27:23.000000000 +0000
-+++ gcc-3.4.0/gcc/cp/class.c 2004-05-10 21:06:50.000000000 +0100
-@@ -524,6 +524,10 @@
- DECL_ALIGN (decl) = MAX (TYPE_ALIGN (double_type_node),
- DECL_ALIGN (decl));
-
-+ /* The vtable's visibility is the class visibility. There is no way
-+ to override the visibility for just the vtable. */
-+ DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
-+ DECL_VISIBILITYSPECIFIED (decl) = CLASSTYPE_VISIBILITYSPECIFIED (class_type);
- import_export_vtable (decl, class_type, 0);
-
- return decl;
-@@ -2971,7 +2975,25 @@
- continue;
-
- if (TREE_CODE (x) == CONST_DECL || TREE_CODE (x) == VAR_DECL)
-- continue;
-+ {
-+ /* Apply the class's visibility attribute to static members
-+ which do not have a visibility attribute. */
-+ if (! lookup_attribute ("visibility", DECL_ATTRIBUTES (x)))
-+ {
-+ if (visibility_options.inlineshidden && DECL_INLINE (x))
-+ {
-+ DECL_VISIBILITY (x) = VISIBILITY_HIDDEN;
-+ DECL_VISIBILITYSPECIFIED (x) = 1;
-+ }
-+ else
-+ {
-+ DECL_VISIBILITY (x) = CLASSTYPE_VISIBILITY (current_class_type);
-+ DECL_VISIBILITYSPECIFIED (x) = CLASSTYPE_VISIBILITYSPECIFIED (current_class_type);
-+ }
-+ }
-+
-+ continue;
-+ }
-
- /* Now it can only be a FIELD_DECL. */
-
-@@ -3708,6 +3730,22 @@
- check_for_override (x, t);
- if (DECL_PURE_VIRTUAL_P (x) && ! DECL_VINDEX (x))
- cp_error_at ("initializer specified for non-virtual method `%D'", x);
-+
-+ /* Apply the class's visibility attribute to methods which do
-+ not have a visibility attribute. */
-+ if (! lookup_attribute ("visibility", DECL_ATTRIBUTES (x)))
-+ {
-+ if (visibility_options.inlineshidden && DECL_INLINE (x))
-+ {
-+ DECL_VISIBILITY (x) = VISIBILITY_HIDDEN;
-+ DECL_VISIBILITYSPECIFIED (x) = 1;
-+ }
-+ else
-+ {
-+ DECL_VISIBILITY (x) = CLASSTYPE_VISIBILITY (current_class_type);
-+ DECL_VISIBILITYSPECIFIED (x) = CLASSTYPE_VISIBILITYSPECIFIED (current_class_type);
-+ }
-+ }
-
- /* The name of the field is the original field name
- Save this in auxiliary field for later overloading. */
-@@ -7830,3 +7868,4 @@
- *vid->last_init = build_tree_list (NULL_TREE, init);
- vid->last_init = &TREE_CHAIN (*vid->last_init);
- }
-+
-
-diff -aur gcc-3.4.0orig/gcc/cp/cp-tree.h gcc-3.4.0/gcc/cp/cp-tree.h
---- gcc-3.4.0orig/gcc/cp/cp-tree.h 2004-03-20 00:13:08.000000000 +0000
-+++ gcc-3.4.0/gcc/cp/cp-tree.h 2004-05-10 20:56:56.000000000 +0100
-@@ -1008,7 +1008,12 @@
- #define PUBLICLY_UNIQUELY_DERIVED_P(PARENT, TYPE) \
- (lookup_base ((TYPE), (PARENT), ba_not_special | ba_quiet, NULL) \
- != NULL_TREE)
--\f
-+
-+/* Gives the visibility specification for a class type. */
-+#define CLASSTYPE_VISIBILITY(TYPE) DECL_VISIBILITY (TYPE_NAME (TYPE))
-+#define CLASSTYPE_VISIBILITYSPECIFIED(TYPE) DECL_VISIBILITYSPECIFIED (TYPE_NAME (TYPE))
-+
-+
- /* This is a few header flags for 'struct lang_type'. Actually,
- all but the first are used only for lang_type_class; they
- are put in this structure to save space. */
-
-diff -aur gcc-3.4.0orig/gcc/cp/decl.c gcc-3.4.0/gcc/cp/decl.c
---- gcc-3.4.0orig/gcc/cp/decl.c 2004-04-01 21:47:21.000000000 +0100
-+++ gcc-3.4.0/gcc/cp/decl.c 2004-05-28 21:16:11.000000000 +0100
-@@ -1869,17 +1869,34 @@
- DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
- COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
-
-- /* If either declaration has a nondefault visibility, use it. */
-- if (DECL_VISIBILITY (olddecl) != VISIBILITY_DEFAULT)
-+ /* Warn about conflicting visibility specifications. */
-+ if (DECL_VISIBILITYSPECIFIED (olddecl) && DECL_VISIBILITYSPECIFIED (newdecl)
-+ && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
-+ {
-+ warning ("%J'%D': visibility attribute ignored because it",
-+ newdecl, newdecl);
-+ warning ("%Jconflicts with previous declaration here", olddecl);
-+ }
-+ /* Choose the declaration which specified visibility. */
-+ if (DECL_VISIBILITYSPECIFIED (olddecl))
- {
-- if (DECL_VISIBILITY (newdecl) != VISIBILITY_DEFAULT
-- && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
-- {
-- warning ("%J'%D': visibility attribute ignored because it",
-- newdecl, newdecl);
-- warning ("%Jconflicts with previous declaration here", olddecl);
-- }
- DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
-+ DECL_VISIBILITYSPECIFIED (newdecl) = 1;
-+ }
-+ /* If it's a definition of a global operator new or operator
-+ delete, it must be default visibility. */
-+ if (NEW_DELETE_OPNAME_P (DECL_NAME (newdecl)) && DECL_INITIAL (newdecl) != NULL_TREE)
-+ {
-+ if (!DECL_FUNCTION_MEMBER_P (newdecl) && VISIBILITY_DEFAULT != DECL_VISIBILITY (newdecl))
-+ {
-+ warning ("%J`%D': ignoring non-default symbol",
-+ newdecl, newdecl);
-+ warning ("%Jvisibility on global operator new or delete", newdecl);
-+ DECL_VISIBILITY (olddecl) = VISIBILITY_DEFAULT;
-+ DECL_VISIBILITYSPECIFIED (olddecl) = 1;
-+ DECL_VISIBILITY (newdecl) = VISIBILITY_DEFAULT;
-+ DECL_VISIBILITYSPECIFIED (newdecl) = 1;
-+ }
- }
-
- if (TREE_CODE (newdecl) == FUNCTION_DECL)
-
-diff -aur gcc-3.4.0orig/gcc/cp/method.c gcc-3.4.0/gcc/cp/method.c
---- gcc-3.4.0orig/gcc/cp/method.c 2004-04-08 23:15:58.000000000 +0100
-+++ gcc-3.4.0/gcc/cp/method.c 2004-05-09 08:10:52.000000000 +0100
-@@ -394,6 +394,7 @@
- rewrite. */
- TREE_PUBLIC (thunk_fndecl) = TREE_PUBLIC (function);
- DECL_VISIBILITY (thunk_fndecl) = DECL_VISIBILITY (function);
-+ DECL_VISIBILITYSPECIFIED (thunk_fndecl) = DECL_VISIBILITYSPECIFIED (function);
-
- if (flag_syntax_only)
- {
-
-diff -aur gcc-3.4.0orig/gcc/cp/optimize.c gcc-3.4.0/gcc/cp/optimize.c
---- gcc-3.4.0orig/gcc/cp/optimize.c 2004-02-08 01:52:50.000000000 +0000
-+++ gcc-3.4.0/gcc/cp/optimize.c 2004-05-09 08:10:52.000000000 +0100
-@@ -155,6 +155,7 @@
- DECL_NOT_REALLY_EXTERN (clone) = DECL_NOT_REALLY_EXTERN (fn);
- TREE_PUBLIC (clone) = TREE_PUBLIC (fn);
- DECL_VISIBILITY (clone) = DECL_VISIBILITY (fn);
-+ DECL_VISIBILITYSPECIFIED (clone) = DECL_VISIBILITYSPECIFIED (fn);
-
- /* Adjust the parameter names and locations. */
- parm = DECL_ARGUMENTS (fn);
-
-diff -aur gcc-3.4.0orig/gcc/cp/rtti.c gcc-3.4.0/gcc/cp/rtti.c
---- gcc-3.4.0orig/gcc/cp/rtti.c 2004-03-08 23:00:26.000000000 +0000
-+++ gcc-3.4.0/gcc/cp/rtti.c 2004-05-10 21:09:21.000000000 +0100
-@@ -361,7 +361,11 @@
- pushdecl_top_level_and_finish (d, NULL_TREE);
-
- if (CLASS_TYPE_P (type))
-- CLASSTYPE_TYPEINFO_VAR (TYPE_MAIN_VARIANT (type)) = d;
-+ {
-+ CLASSTYPE_TYPEINFO_VAR (TYPE_MAIN_VARIANT (type)) = d;
-+ DECL_VISIBILITY (d) = CLASSTYPE_VISIBILITY (type);
-+ DECL_VISIBILITYSPECIFIED (d) = CLASSTYPE_VISIBILITYSPECIFIED (type);
-+ }
-
- /* Remember the type it is for. */
- TREE_TYPE (name) = type;
-@@ -759,6 +763,11 @@
- TREE_STATIC (name_decl) = 1;
- DECL_EXTERNAL (name_decl) = 0;
- TREE_PUBLIC (name_decl) = 1;
-+ if (CLASS_TYPE_P (target))
-+ {
-+ DECL_VISIBILITY (name_decl) = CLASSTYPE_VISIBILITY (target);
-+ DECL_VISIBILITYSPECIFIED (name_decl) = CLASSTYPE_VISIBILITYSPECIFIED (target);
-+ }
- import_export_tinfo (name_decl, target, typeinfo_in_lib_p (target));
- /* External name of the string containing the type's name has a
- special name. */
-
-diff -aur gcc-3.4.0orig/gcc/c-pragma.c gcc-3.4.0/gcc/c-pragma.c
---- gcc-3.4.0orig/gcc/c-pragma.c 2004-01-23 23:35:53.000000000 +0000
-+++ gcc-3.4.0/gcc/c-pragma.c 2004-05-09 08:10:52.000000000 +0100
-@@ -480,6 +480,86 @@
- return asmname;
- }
-
-+
-+#ifdef HANDLE_PRAGMA_VISIBILITY
-+static void handle_pragma_visibility (cpp_reader *);
-+
-+/* 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
-@@ -505,6 +585,9 @@
- #ifdef HANDLE_PRAGMA_EXTERN_PREFIX
- c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
- #endif
-+#ifdef HANDLE_PRAGMA_VISIBILITY
-+ c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
-+#endif
-
- #ifdef REGISTER_TARGET_PRAGMAS
- REGISTER_TARGET_PRAGMAS ();
-diff -aur gcc-3.4.0orig/gcc/c-pragma.h gcc-3.4.0/gcc/c-pragma.h
---- gcc-3.4.0orig/gcc/c-pragma.h 2004-01-31 06:18:05.000000000 +0000
-+++ gcc-3.4.0/gcc/c-pragma.h 2004-05-09 08:10:53.000000000 +0100
-@@ -44,6 +44,11 @@
- #define HANDLE_PRAGMA_PACK 1
- #endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-
-+/* It's safe to always leave visibility pragma enabled as if
-+ visibility is not supported on the host OS platform the
-+ statements are ignored. */
-+#define HANDLE_PRAGMA_VISIBILITY 1
-+
- extern void init_pragma (void);
-
- /* Front-end wrapper for pragma registration to avoid dragging
-
-
-diff -aur gcc-3.4.0orig/gcc/doc/invoke.texi gcc-3.4.0/gcc/doc/invoke.texi
---- gcc-3.4.0orig/gcc/doc/invoke.texi 2004-04-19 00:05:36.000000000 +0100
-+++ gcc-3.4.0/gcc/doc/invoke.texi 2004-05-28 21:29:36.000000000 +0100
-@@ -183,7 +183,8 @@
- -fno-optional-diags -fpermissive @gol
- -frepo -fno-rtti -fstats -ftemplate-depth-@var{n} @gol
- -fuse-cxa-atexit -fno-weak -nostdinc++ @gol
---fno-default-inline -Wabi -Wctor-dtor-privacy @gol
-+-fno-default-inline -fvisibility-inlines-hidden @gol
-+-Wabi -Wctor-dtor-privacy @gol
- -Wnon-virtual-dtor -Wreorder @gol
- -Weffc++ -Wno-deprecated @gol
- -Wno-non-template-friend -Wold-style-cast @gol
-@@ -674,7 +675,8 @@
- -fargument-alias -fargument-noalias @gol
- -fargument-noalias-global -fleading-underscore @gol
- -ftls-model=@var{model} @gol
---ftrapv -fwrapv -fbounds-check}
-+-ftrapv -fwrapv -fbounds-check @gol
-+-fvisibility}
- @end table
-
- @menu
-@@ -1433,6 +1435,20 @@
- destructors, but will only work if your C library supports
- @code{__cxa_atexit}.
-
-+@item -fvisibility-inlines-hidden
-+@opindex fvisibility-inlines-hidden
-+Causes all inlined methods to be marked with
-+@code{__attribute__ ((visibility ("hidden")))} so that they do not
-+appear in the export table of a DSO and do not require a PLT indirection
-+when used within the DSO. Enabling this option can have a dramatic effect
-+on load and link times of a DSO as it massively reduces the size of the
-+dynamic export table when the library makes heavy use of templates. While
-+it can cause bloating through duplication of code within each DSO where
-+it is used, often the wastage is less than the considerable space occupied
-+by a long symbol name in the export table which is typical when using
-+templates and namespaces. For even more savings, combine with the
-+@code{-fvisibility=hidden} switch.
-+
- @item -fno-weak
- @opindex fno-weak
- Do not use weak symbol support, even if it is provided by the linker.
-@@ -11198,6 +11214,54 @@
-
- The default without @option{-fpic} is @code{initial-exec}; with
- @option{-fpic} the default is @code{global-dynamic}.
-+
-+@item -fvisibility=@var{default|internal|hidden|protected}
-+@opindex fvisibility
-+Set the default ELF image symbol visibility to the specified option - all
-+symbols will be marked with this unless overrided within the code.
-+Using this feature can very substantially improve linking and
-+load times of shared object libraries, produce more optimised
-+code, provide near-perfect API export and prevent symbol clashes.
-+It is @strong{strongly} recommended that you use this in any shared objects
-+you distribute.
-+
-+Despite the nomenclature, @code{default} always means public ie;
-+available to be linked against from outside the shared object.
-+@code{protected} and @code{internal} are pretty useless in real-world
-+usage so the only other commonly used option will be @code{hidden}.
-+The default if -fvisibility isn't specified is @code{default} ie; make every
-+symbol public - this causes the same behaviour as previous versions of
-+GCC.
-+
-+A good explanation of the benefits offered by ensuring ELF
-+symbols have the correct visibility is given by ``How To Write
-+Shared Libraries'' by Ulrich Drepper (which can be found at
-+@w{@uref{http://people.redhat.com/~drepper/}}) - however a superior
-+solution made possible by this option to marking things hidden when
-+the default is public is to make the default hidden and mark things
-+public. This is the norm with DLL's on Windows and with @option{-fvisibility=hidden}
-+and @code{__attribute__ ((visibility("default")))} instead of
-+@code{__declspec(dllexport)} you get almost identical semantics with
-+identical syntax. This is a great boon to those working with
-+cross-platform projects.
-+
-+For those adding visibility support to existing code, you may find
-+@samp{#pragma GCC visibility} of use. This works by you enclosing
-+the declarations you wish to set visibility for with (for example)
-+@samp{#pragma GCC visibility push(hidden)} and
-+@samp{#pragma GCC visibility pop}. These can be nested up to sixteen
-+times. Bear in mind that symbol visibility should be viewed @strong{as
-+part of the API interface contract} and thus all new code should
-+always specify visibility when it is not the default ie; declarations
-+only for use within the local DSO should @strong{always} be marked explicitly
-+as hidden as so to avoid PLT indirection overheads - making this
-+abundantly clear also aids readability and self-documentation of the code.
-+Note that due to ISO C++ specification requirements, operator new and
-+operator delete must always be of default visibility.
-+
-+An overview of these techniques, their benefits and how to use them
-+is at @w{@uref{http://www.nedprod.com/programs/gccvisibility.html}}.
-+
- @end table
-
- @c man end
-
-diff -aur gcc-3.4.0orig/gcc/flags.h gcc-3.4.0/gcc/flags.h
---- gcc-3.4.0orig/gcc/flags.h 2004-02-18 00:09:04.000000000 +0000
-+++ gcc-3.4.0/gcc/flags.h 2004-05-09 08:10:53.000000000 +0100
-@@ -60,6 +60,30 @@
- /* Nonzero means emit debugging information only for symbols which are used. */
- extern int flag_debug_only_used_symbols;
-
-+/* Enumerate visibility settings. */
-+#ifndef SYMBOL_VISIBILITY_DEFINED
-+#define SYMBOL_VISIBILITY_DEFINED
-+enum symbol_visibility
-+{
-+ VISIBILITY_DEFAULT,
-+ VISIBILITY_INTERNAL,
-+ VISIBILITY_HIDDEN,
-+ VISIBILITY_PROTECTED
-+};
-+#endif
-+
-+/* The default visibility for all symbols (unless overridden). */
-+extern enum symbol_visibility default_visibility;
-+
-+struct visibility_flags
-+{
-+ unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
-+ unsigned inlineshidden : 1; /* True when -finlineshidden in effect. */
-+};
-+
-+/* Global visibility options. */
-+extern struct visibility_flags visibility_options;
-+
- /* Nonzero means do optimizations. -opt. */
-
- extern int optimize;
-
-diff -aur gcc-3.4.0orig/gcc/opts.c gcc-3.4.0/gcc/opts.c
---- gcc-3.4.0orig/gcc/opts.c 2004-02-18 00:09:04.000000000 +0000
-+++ gcc-3.4.0/gcc/opts.c 2004-05-09 08:10:53.000000000 +0100
-@@ -142,6 +142,12 @@
- write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
- bool use_gnu_debug_info_extensions;
-
-+/* The default visibility for all symbols (unless overridden) */
-+enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
-+
-+/* Global visibility options. */
-+struct visibility_flags visibility_options;
-+
- /* Columns of --help display. */
- static unsigned int columns = 80;
-
-@@ -1440,6 +1446,21 @@
- flag_verbose_asm = value;
- break;
-
-+ case OPT_fvisibility_:
-+ {
-+ if(!strcmp(arg, "default"))
-+ default_visibility=VISIBILITY_DEFAULT;
-+ else if(!strcmp(arg, "internal"))
-+ default_visibility=VISIBILITY_INTERNAL;
-+ else if(!strcmp(arg, "hidden"))
-+ default_visibility=VISIBILITY_HIDDEN;
-+ else if(!strcmp(arg, "protected"))
-+ default_visibility=VISIBILITY_PROTECTED;
-+ else
-+ error("unrecognised visibility value \"%s\"", arg);
-+ }
-+ break;
-+
- case OPT_fweb:
- flag_web = value;
- break;
-
-diff -aur gcc-3.4.0orig/gcc/tree.c gcc-3.4.0/gcc/tree.c
---- gcc-3.4.0orig/gcc/tree.c 2004-02-05 22:01:35.000000000 +0000
-+++ gcc-3.4.0/gcc/tree.c 2004-05-10 15:22:52.000000000 +0100
-@@ -2563,6 +2563,11 @@
- layout_decl (t, 0);
- else if (code == FUNCTION_DECL)
- DECL_MODE (t) = FUNCTION_MODE;
-+
-+ /* Set default visibility to whatever the user supplied with
-+ visibility_specified depending on #pragma GCC visibility. */
-+ DECL_VISIBILITY (t) = default_visibility;
-+ DECL_VISIBILITYSPECIFIED (t) = visibility_options.inpragma;
-
- return t;
- }
-
-diff -aur gcc-3.4.0orig/gcc/tree.h gcc-3.4.0/gcc/tree.h
---- gcc-3.4.0orig/gcc/tree.h 2004-02-08 01:52:43.000000000 +0000
-+++ gcc-3.4.0/gcc/tree.h 2004-05-09 08:10:54.000000000 +0100
-@@ -1499,6 +1499,10 @@
- /* Value of the decls's visibility attribute */
- #define DECL_VISIBILITY(NODE) (DECL_CHECK (NODE)->decl.visibility)
-
-+/* Nonzero means that the decl had its visibility specified rather than
-+ being inferred. */
-+#define DECL_VISIBILITYSPECIFIED(NODE) (DECL_CHECK (NODE)->decl.visibility_specified)
-+
- /* In a FUNCTION_DECL, nonzero if the function cannot be inlined. */
- #define DECL_UNINLINABLE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl.uninlinable)
-
-@@ -1633,7 +1637,8 @@
- || TREE_CODE (DECL_CONTEXT (EXP)) == TRANSLATION_UNIT_DECL)
-
- /* Enumerate visibility settings. */
--
-+#ifndef SYMBOL_VISIBILITY_DEFINED
-+#define SYMBOL_VISIBILITY_DEFINED
- enum symbol_visibility
- {
- VISIBILITY_DEFAULT,
-@@ -1641,6 +1646,7 @@
- VISIBILITY_HIDDEN,
- VISIBILITY_PROTECTED
- };
-+#endif
-
- struct function;
-
-@@ -1684,8 +1690,7 @@
- unsigned thread_local_flag : 1;
- unsigned declared_inline_flag : 1;
- ENUM_BITFIELD(symbol_visibility) visibility : 2;
-- unsigned unused : 1;
-- /* one unused bit. */
-+ unsigned visibility_specified : 1;
-
- unsigned lang_flag_0 : 1;
- unsigned lang_flag_1 : 1;
-
-diff -aur gcc-3.4.0orig/gcc/varasm.c gcc-3.4.0/gcc/varasm.c
---- gcc-3.4.0orig/gcc/varasm.c 2004-04-14 22:14:08.000000000 +0100
-+++ gcc-3.4.0/gcc/varasm.c 2004-05-09 08:10:54.000000000 +0100
-@@ -5150,8 +5150,8 @@
- /* Static variables are always local. */
- else if (! TREE_PUBLIC (exp))
- local_p = true;
-- /* A variable is local if the user tells us so. */
-- else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
-+ /* A variable is local if the user explicitly tells us so. */
-+ else if (DECL_VISIBILITYSPECIFIED (exp) && DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
- local_p = true;
- /* Otherwise, variables defined outside this object may not be local. */
- else if (DECL_EXTERNAL (exp))
-@@ -5159,6 +5159,9 @@
- /* Linkonce and weak data are never local. */
- else if (DECL_ONE_ONLY (exp) || DECL_WEAK (exp))
- local_p = false;
-+ /* If none of the above and visibility is not default, make local. */
-+ else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
-+ local_p = true;
- /* If PIC, then assume that any global name can be overridden by
- symbols resolved from other modules. */
- else if (shlib)
-
projects / packages / compat-gcc-34.git / commitdiff