+// Behavior for relocations to discarded comdat sections.
+
+enum Comdat_behavior
+{
+ CB_UNDETERMINED, // Not yet determined -- need to look at section name.
+ CB_PRETEND, // Attempt to map to the corresponding kept section.
+ CB_IGNORE, // Ignore the relocation.
+ CB_WARNING // Print a warning.
+};
+
+class Default_comdat_behavior
+{
+ public:
+ // Decide what the linker should do for relocations that refer to
+ // discarded comdat sections. This decision is based on the name of
+ // the section being relocated.
+
+ inline Comdat_behavior
+ get(const char* name)
+ {
+ if (Layout::is_debug_info_section(name))
+ return CB_PRETEND;
+ if (strcmp(name, ".eh_frame") == 0
+ || strcmp(name, ".gcc_except_table") == 0)
+ return CB_IGNORE;
+ return CB_WARNING;
+ }
+};
+
+// Give an error for a symbol with non-default visibility which is not
+// defined locally.
+
+inline void
+visibility_error(const Symbol* sym)
+{
+ const char* v;
+ switch (sym->visibility())
+ {
+ case elfcpp::STV_INTERNAL:
+ v = _("internal");
+ break;
+ case elfcpp::STV_HIDDEN:
+ v = _("hidden");
+ break;
+ case elfcpp::STV_PROTECTED:
+ v = _("protected");
+ break;
+ default:
+ gold_unreachable();
+ }
+ gold_error(_("%s symbol '%s' is not defined locally"),
+ v, sym->name());
+}
+
+// Return true if we are should issue an error saying that SYM is an
+// undefined symbol. This is called if there is a relocation against
+// SYM.
+
+inline bool
+issue_undefined_symbol_error(const Symbol* sym)
+{
+ // We only report global symbols.
+ if (sym == NULL)
+ return false;
+
+ // We only report undefined symbols.
+ if (!sym->is_undefined() && !sym->is_placeholder())
+ return false;
+
+ // We don't report weak symbols.
+ if (sym->binding() == elfcpp::STB_WEAK)
+ return false;
+
+ // We don't report symbols defined in discarded sections.
+ if (sym->is_defined_in_discarded_section())
+ return false;
+
+ // If the target defines this symbol, don't report it here.
+ if (parameters->target().is_defined_by_abi(sym))
+ return false;
+
+ // See if we've been told to ignore whether this symbol is
+ // undefined.
+ const char* const u = parameters->options().unresolved_symbols();
+ if (u != NULL)
+ {
+ if (strcmp(u, "ignore-all") == 0)
+ return false;
+ if (strcmp(u, "report-all") == 0)
+ return true;
+ if (strcmp(u, "ignore-in-object-files") == 0 && !sym->in_dyn())
+ return false;
+ if (strcmp(u, "ignore-in-shared-libs") == 0 && !sym->in_reg())
+ return false;
+ }
+
+ // When creating a shared library, only report unresolved symbols if
+ // -z defs was used.
+ if (parameters->options().shared() && !parameters->options().defs())
+ return false;
+
+ // Otherwise issue a warning.
+ return true;
+}
+