diff options
Diffstat (limited to 'packages/gcc/gcc-3.4.6/GCC3.4.0VisibilityPatch.diff')
| -rw-r--r-- | packages/gcc/gcc-3.4.6/GCC3.4.0VisibilityPatch.diff | 1100 |
1 files changed, 1100 insertions, 0 deletions
diff --git a/packages/gcc/gcc-3.4.6/GCC3.4.0VisibilityPatch.diff b/packages/gcc/gcc-3.4.6/GCC3.4.0VisibilityPatch.diff new file mode 100644 index 0000000000..d51da7157d --- /dev/null +++ b/packages/gcc/gcc-3.4.6/GCC3.4.0VisibilityPatch.diff @@ -0,0 +1,1100 @@ + +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) +- ++ ++/* 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) + +diff -Naur gcc-3.4.0orig/gcc/testsuite/gcc.dg/visibility-9.c gcc-3.4.0/gcc/testsuite/gcc.dg/visibility-9.c +--- gcc-3.4.0orig/gcc/testsuite/gcc.dg/visibility-9.c 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/gcc.dg/visibility-9.c 2004-05-09 12:40:39.000000000 +0100 +@@ -0,0 +1,9 @@ ++/* Test that -fvisibility works. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-options "-fvisibility=hidden" } */ ++/* { dg-final { scan-assembler "\\.hidden.*foo" } } */ ++ ++void foo(); ++ ++void foo() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/gcc.dg/visibility-a.c gcc-3.4.0/gcc/testsuite/gcc.dg/visibility-a.c +--- gcc-3.4.0orig/gcc/testsuite/gcc.dg/visibility-a.c 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/gcc.dg/visibility-a.c 2004-05-09 12:55:04.000000000 +0100 +@@ -0,0 +1,10 @@ ++/* Test that #pragma GCC visibility works. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.hidden.*foo" } } */ ++ ++#pragma GCC visibility push(hidden) ++void foo(); ++#pragma GCC visibility pop ++ ++void foo() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility.C 2004-05-09 19:17:13.000000000 +0100 +@@ -0,0 +1,12 @@ ++/* Test that -fvisibility affects class members. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-options "-fvisibility=hidden" } */ ++/* { dg-final { scan-assembler "\\.hidden.*Foo.methodEv" } } */ ++ ++class Foo ++{ ++ void method(); ++}; ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility-inlines-hidden.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility-inlines-hidden.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility-inlines-hidden.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility-inlines-hidden.C 2004-05-09 19:17:59.000000000 +0100 +@@ -0,0 +1,18 @@ ++/* Test that -fvisibility-inlines-hidden affects class members. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-options "-fvisibility-inlines-hidden" } */ ++/* { dg-final { scan-assembler "\\.hidden.*Foo.methodEv" } } */ ++ ++class Foo ++{ ++public: ++ void method() { } ++}; ++ ++int main(void) ++{ ++ Foo f; ++ f.method(); ++ return 0; ++} +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override1.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override1.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override1.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override1.C 2004-05-09 19:18:06.000000000 +0100 +@@ -0,0 +1,12 @@ ++/* Test that -fvisibility does not override class member specific settings. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-options "-fvisibility=hidden" } */ ++/* { dg-final { scan-assembler "\\.internal.*Foo.methodEv" } } */ ++ ++class __attribute__ ((visibility ("internal"))) Foo ++{ ++ void method(); ++}; ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override2.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override2.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override2.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/fvisibility-override2.C 2004-05-09 19:18:12.000000000 +0100 +@@ -0,0 +1,12 @@ ++/* Test that -fvisibility does not override class member specific settings. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-options "-fvisibility=hidden" } */ ++/* { dg-final { scan-assembler "\\.internal.*Foo.methodEv" } } */ ++ ++class Foo ++{ ++ __attribute__ ((visibility ("internal"))) void method(); ++}; ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/memfuncts.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/memfuncts.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/memfuncts.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/memfuncts.C 2004-05-09 19:18:19.000000000 +0100 +@@ -0,0 +1,11 @@ ++/* Test that setting visibility for class member functions works. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.hidden.*Foo.methodEv" } } */ ++ ++class __attribute__ ((visibility ("hidden"))) Foo ++{ ++ void method(); ++}; ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/noPLT.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/noPLT.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/noPLT.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/noPLT.C 2004-05-09 19:21:49.000000000 +0100 +@@ -0,0 +1,20 @@ ++/* Test that -fvisibility=hidden prevents PLT. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-options "-fPIC -fvisibility=hidden" } */ ++/* { dg-final { scan-assembler-not "methodEv@PLT" } } */ ++ ++class Foo ++{ ++public: ++ void method(); ++}; ++ ++void Foo::method() { } ++ ++int main(void) ++{ ++ Foo f; ++ f.method(); ++ return 0; ++} +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/pragma.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/pragma.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/pragma.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/pragma.C 2004-05-09 19:18:30.000000000 +0100 +@@ -0,0 +1,13 @@ ++/* Test that #pragma GCC visibility affects class members. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.hidden.*Foo.methodEv" } } */ ++ ++#pragma GCC visibility push(hidden) ++class Foo ++{ ++ void method(); ++}; ++#pragma GCC visibility pop ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/pragma-override1.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/pragma-override1.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/pragma-override1.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/pragma-override1.C 2004-05-09 19:18:36.000000000 +0100 +@@ -0,0 +1,13 @@ ++/* Test that #pragma GCC visibility does not override class member specific settings. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.internal.*Foo.methodEv" } } */ ++ ++#pragma GCC visibility push(hidden) ++class __attribute__ ((visibility ("internal"))) Foo ++{ ++ void method(); ++}; ++#pragma GCC visibility pop ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/pragma-override2.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/pragma-override2.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/pragma-override2.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/pragma-override2.C 2004-05-09 19:18:44.000000000 +0100 +@@ -0,0 +1,13 @@ ++/* Test that #pragma GCC visibility does not override class member specific settings. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.internal.*Foo.methodEv" } } */ ++ ++#pragma GCC visibility push(hidden) ++class Foo ++{ ++ __attribute__ ((visibility ("internal"))) void method(); ++}; ++#pragma GCC visibility pop ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/staticmemfuncts.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/staticmemfuncts.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/staticmemfuncts.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/staticmemfuncts.C 2004-05-09 19:18:50.000000000 +0100 +@@ -0,0 +1,11 @@ ++/* Test that setting visibility for static class member functions works. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.hidden.*Foo.methodEv" } } */ ++ ++class __attribute__ ((visibility ("hidden"))) Foo ++{ ++ static void method(); ++}; ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/virtual.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/virtual.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/virtual.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/virtual.C 2004-05-09 13:24:06.000000000 +0100 +@@ -0,0 +1,11 @@ ++/* Test that setting visibility for class affects virtual table. */ ++/* { dg-do compile } */ ++/* { dg-require-visibility "" } */ ++/* { dg-final { scan-assembler "\\.hidden.*ZTV3Foo" } } */ ++ ++class __attribute__ ((visibility ("hidden"))) Foo ++{ ++ virtual void method(); ++}; ++ ++void Foo::method() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-1.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-1.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-1.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-1.C 2003-12-10 06:34:44.000000000 +0000 +@@ -0,0 +1,8 @@ ++/* Test visibility attribute on function definition. */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*_Z3foov" } } */ ++ ++void ++__attribute__((visibility ("hidden"))) ++foo() ++{ } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-2.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-2.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-2.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-2.C 2003-12-10 06:34:44.000000000 +0000 +@@ -0,0 +1,7 @@ ++/* Test that visibility attribute on declaration extends to definition. */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*_Z3foov" } } */ ++ ++void __attribute__((visibility ("hidden"))) foo(); ++ ++void foo() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-3.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-3.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-3.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-3.C 2003-12-10 06:34:45.000000000 +0000 +@@ -0,0 +1,7 @@ ++/* Test visibility attribute on forward declaration of global variable */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ ++ ++int ++__attribute__((visibility ("hidden"))) ++xyzzy = 5; +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-4.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-4.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-4.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-4.C 2003-12-10 06:34:45.000000000 +0000 +@@ -0,0 +1,8 @@ ++/* Test visibility attribute on forward declaration of global variable */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ ++ ++extern int __attribute__ ((visibility ("hidden"))) ++xyzzy; ++ ++int xyzzy = 5; +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-5.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-5.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-5.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-5.C 2003-12-10 06:34:45.000000000 +0000 +@@ -0,0 +1,11 @@ ++/* Test visibility attribute on definition of a function that has ++ already had a forward declaration. */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*_Z3foov" } } */ ++ ++void foo(); ++ ++void ++ __attribute__((visibility ("hidden"))) ++foo() ++{ } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-6.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-6.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-6.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-6.C 2003-12-10 06:34:45.000000000 +0000 +@@ -0,0 +1,10 @@ ++/* Test visibility attribute on definition of global variable that has ++ already had a forward declaration. */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ ++ ++extern int xyzzy; ++ ++int ++__attribute__((visibility ("hidden"))) ++xyzzy = 5; +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-7.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-7.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility/visibility-7.C 1970-01-01 01:00:00.000000000 +0100 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility/visibility-7.C 2003-12-10 06:34:45.000000000 +0000 +@@ -0,0 +1,11 @@ ++/* Test warning from conflicting visibility specifications. */ ++/* { dg-do compile { target *86-*-linux* } } */ ++/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ ++ ++extern int ++__attribute__((visibility ("hidden"))) ++xyzzy; /* { dg-warning "previous declaration here" "" } */ ++ ++int ++__attribute__((visibility ("protected"))) ++xyzzy = 5; /* { dg-warning "visibility attribute ignored" "" } */ +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-1.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-1.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-1.C 2003-12-10 06:34:44.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-1.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,8 +0,0 @@ +-/* Test visibility attribute on function definition. */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*_Z3foov" } } */ +- +-void +-__attribute__((visibility ("hidden"))) +-foo() +-{ } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-2.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-2.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-2.C 2003-12-10 06:34:44.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-2.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,7 +0,0 @@ +-/* Test that visibility attribute on declaration extends to definition. */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*_Z3foov" } } */ +- +-void __attribute__((visibility ("hidden"))) foo(); +- +-void foo() { } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-3.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-3.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-3.C 2003-12-10 06:34:45.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-3.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,7 +0,0 @@ +-/* Test visibility attribute on forward declaration of global variable */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ +- +-int +-__attribute__((visibility ("hidden"))) +-xyzzy = 5; +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-4.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-4.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-4.C 2003-12-10 06:34:45.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-4.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,8 +0,0 @@ +-/* Test visibility attribute on forward declaration of global variable */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ +- +-extern int __attribute__ ((visibility ("hidden"))) +-xyzzy; +- +-int xyzzy = 5; +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-5.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-5.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-5.C 2003-12-10 06:34:45.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-5.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,11 +0,0 @@ +-/* Test visibility attribute on definition of a function that has +- already had a forward declaration. */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*_Z3foov" } } */ +- +-void foo(); +- +-void +- __attribute__((visibility ("hidden"))) +-foo() +-{ } +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-6.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-6.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-6.C 2003-12-10 06:34:45.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-6.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,10 +0,0 @@ +-/* Test visibility attribute on definition of global variable that has +- already had a forward declaration. */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ +- +-extern int xyzzy; +- +-int +-__attribute__((visibility ("hidden"))) +-xyzzy = 5; +diff -Naur gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-7.C gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-7.C +--- gcc-3.4.0orig/gcc/testsuite/g++.dg/ext/visibility-7.C 2003-12-10 06:34:45.000000000 +0000 ++++ gcc-3.4.0/gcc/testsuite/g++.dg/ext/visibility-7.C 1970-01-01 01:00:00.000000000 +0100 +@@ -1,11 +0,0 @@ +-/* Test warning from conflicting visibility specifications. */ +-/* { dg-do compile { target *86-*-linux* } } */ +-/* { dg-final { scan-assembler "\\.hidden.*xyzzy" } } */ +- +-extern int +-__attribute__((visibility ("hidden"))) +-xyzzy; /* { dg-warning "previous declaration here" "" } */ +- +-int +-__attribute__((visibility ("protected"))) +-xyzzy = 5; /* { dg-warning "visibility attribute ignored" "" } */ |