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* doc/tm.texi (ASM_WEAKEN_DECL): Document. (ASM_WEAKEN_LABEL): Mention ASM_WEAKEN_DECL. (SUPPORTS_WEAK): Likewise. * output.h (add_weak): Add tree param. * varasm.c (add_weak): Likewise. Save decl. (struct weak_syms): Add decl field. (mark_weak_decls): New function. (init_varasm_once): ggc_add_root mark_weak_decls. (assemble_start_function): Use ASM_WEAKEN_DECL. (assemble_variable): Likewise. (assemble_alias): Likewise. (declare_weak): Pass decl to add_weak. (weak_finish): Use ASM_WEAKEN_DECL. Try to find decl. (remove_from_pending_weak_list): Declare and define for ASM_WEAKEN_DECL. * c-pragma.c (handle_pragma_weak): Adjust add_weak call. * c-pragma.h (HANDLE_PRAGMA_WEAK): Define if ASM_WEAKEN_DECL too. * defaults.h (SUPPORTS_WEAK): Likewise. * config/rs6000/linux64.h (ASM_DECLARE_FUNCTION_NAME): Don't emit .weak for code sym. Do emit .size for descriptor sym. (ASM_DECLARE_FUNCTION_SIZE): Define. * config/rs6000/rs6000.h (ASM_WEAKEN_DECL): Define. (ASM_OUTPUT_DEF_FROM_DECLS): Don't emit .weak here. Don't output .lglobl unless TARGET_XCOFF. Formatting fixes. * config/rs6000/xcoff.h (ASM_DECLARE_FUNCTION_NAME): Don't emit .weak for code sym. (HANDLE_PRAGMA_WEAK): Remove. (ASM_WEAKEN_LABEL): Remove. * config/rs6000/aix.h (HANDLE_SYSV_PRAGMA): Define. Co-Authored-By: David Edelsohn <edelsohn@gnu.org> From-SVN: r50181
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