Add a target hook for assembling undeclared decls.

	* target.def (assemble_undefined_decl): New hooks.
	* hooks.c (hook_void_FILEptr_constcharptr_const_tree): New function.
	* hooks.h (hook_void_FILEptr_constcharptr_const_tree): Declare.
	* doc/tm.texi.in (TARGET_ASM_ASSEMBLE_UNDEFINED_DECL): Add.
	* doc/tm.texi: Regenerate.
	* output.h (assemble_undefined_decl): Declare.
	(get_fnname_from_decl): Declare.
	* varasm.c (assemble_undefined_decl): New function.
	(get_fnname_from_decl): New function.
	* final.c (rest_of_handle_final): Use it.
	* varpool.c (varpool_output_variables): Call assemble_undefined_decl
	for nodes without a definition.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@217293 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 7 insertions, 0 deletions

diff --git a/gcc/output.h b/gcc/output.h
index f213b996429..e19fdd3f42b 100644
--- a/gcc/output.h
+++ b/gcc/output.h
@@ -178,6 +178,9 @@ extern void default_assemble_visibility (tree, int);
    for an `asm' keyword used between functions.  */
 extern void assemble_asm (tree);
 
+/* Get the function's name from a decl, as described by its RTL.  */
+extern const char *get_fnname_from_decl (tree);
+
 /* Output assembler code for the constant pool of a function and associated
    with defining the name of the function.  DECL describes the function.
    NAME is the function's name.  For the constant pool, we use the current
@@ -203,6 +206,10 @@ extern void assemble_variable (tree, int, int, int);
    into the preinit array.  */
 extern void assemble_vtv_preinit_initializer (tree);
 
+/* Assemble everything that is needed for a variable declaration that has
+   no definition in the current translation unit.  */
+extern void assemble_undefined_decl (tree);
+
 /* Compute the alignment of variable specified by DECL.
    DONT_OUTPUT_DATA is from assemble_variable.  */
 extern void align_variable (tree decl, bool dont_output_data);