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+// errors.h -- handle errors for gold -*- C++ -*-
+
+// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#ifndef GOLD_ERRORS_H
+#define GOLD_ERRORS_H
+
+#include <cstdarg>
+
+#include "gold-threads.h"
+
+namespace gold
+{
+
+class Symbol;
+template<int size, bool big_endian>
+struct Relocate_info;
+
+// This class handles errors for gold. There is a single instance
+// which is used by all threads. If and when we make the gold code
+// more amenable to being used in a library, we will make this an
+// abstract interface class, and expect the caller to provide their
+// own instantiation.
+
+class Errors
+{
+ public:
+ Errors(const char* program_name);
+
+ // Report a fatal error. After printing the error, this must exit.
+ void
+ fatal(const char* format, va_list) ATTRIBUTE_NORETURN;
+
+ // Report an error and continue.
+ void
+ error(const char* format, va_list);
+
+ // Report a warning and continue.
+ void
+ warning(const char* format, va_list);
+
+ // Report an error at a reloc location.
+ template<int size, bool big_endian>
+ void
+ error_at_location(const Relocate_info<size, big_endian>* relinfo,
+ size_t relnum, off_t reloffset,
+ const char* format, va_list);
+
+ // Report a warning at a reloc location.
+ template<int size, bool big_endian>
+ void
+ warning_at_location(const Relocate_info<size, big_endian>* relinfo,
+ size_t relnum, off_t reloffset,
+ const char* format, va_list);
+
+ // Issue an undefined symbol error. SYM is the undefined symbol.
+ // RELINFO is the general relocation info. RELNUM is the number of
+ // the reloc, and RELOFFSET is the reloc's offset.
+ template<int size, bool big_endian>
+ void
+ undefined_symbol(const Symbol* sym,
+ const Relocate_info<size, big_endian>* relinfo,
+ size_t relnum, off_t reloffset);
+
+ // Return the number of errors.
+ int
+ error_count() const
+ { return this->error_count_; }
+
+ private:
+ Errors(const Errors&);
+ Errors& operator=(const Errors&);
+
+ // The number of times we report an undefined symbol.
+ static const int max_undefined_error_report = 5;
+
+ // The name of the program.
+ const char* program_name_;
+ // This class can be accessed from multiple threads. This lock is
+ // used to control access to the data structures.
+ Lock lock_;
+ // Numbers of errors reported.
+ int error_count_;
+ // Number of warnings reported.
+ int warning_count_;
+ // A map counting the numbers of times we have seen an undefined
+ // symbol.
+ Unordered_map<const Symbol*, int> undefined_symbols_;
+};
+
+} // End namespace gold.
+
+#endif // !defined(GOLD_ERRORS_H)