target.h (globalize_decl_name): New.

	* target.h (globalize_decl_name): New.
	* target-def.h (TARGET_ASM_GLOBALIZE_DECL_NAME): New.
	* output.h (default_globalize_decl_name): New.
	* varasm.c (asm_output_bss): Use globalize_decl_name instead of
	globalize_label.
        (globalize_decl): Ditto.
	(default_globalize_decl_name): New.
	* config/ia64/ia64.c (ia64_globalize_decl_name): New.
	(ia64_handle_version_id_attribute): New.
	(TARGET_ASM_GLOBALIZE_DECL_NAME): New.
	(ia64_asm_output_external): Use globalize_decl_name instead
	of globalize_label.
	* doc/extend.texi (version_id): New pragma.
	* doc/tm.texi (ARGET_ASM_GLOBALIZE_DECL_NAME): New target hook.

From-SVN: r121128

2 files changed, 21 insertions, 0 deletions

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 0eec8d2..8bbb316 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -2366,6 +2366,19 @@ for the function even if it appears that the function is not referenced.
 This is useful, for example, when the function is referenced only in
 inline assembly.
 
+@item version_id
+@cindex @code{version_id} attribute on IA64 HP-UX
+This attribute, attached to a global variable or function, renames a
+symbol to contain a version string, thus allowing for function level
+versioning.  HP-UX system header files may use version level functioning
+for some system calls.
+
+@smallexample
+extern int foo () __attribute__((version_id ("20040821")));
+@end smallexample
+
+Calls to @var{foo} will be mapped to calls to @var{foo@{20040821@}}.
+
 @item visibility ("@var{visibility_type}")
 @cindex @code{visibility} attribute
 This attribute affects the linkage of the declaration to which it is attached.
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 3390575..b2292c3 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -7198,6 +7198,14 @@ The default implementation relies on a proper definition of
 @code{GLOBAL_ASM_OP}.
 @end deftypefn
 
+@deftypefn {Target Hook} void TARGET_ASM_GLOBALIZE_DECL_NAME (FILE *@var{stream}, tree @var{decl})
+This target hook is a function to output to the stdio stream
+@var{stream} some commands that will make the name associated with @var{decl}
+global; that is, available for reference from other files.
+
+The default implementation uses the TARGET_ASM_GLOBALIZE_LABEL target hook.
+@end deftypefn
+
 @defmac ASM_WEAKEN_LABEL (@var{stream}, @var{name})
 A C statement (sans semicolon) to output to the stdio stream
 @var{stream} some commands that will make the label @var{name} weak;