* gcov.c (bb_file_time): New static variable.
(object_directory): May also be object file.
(preserve_paths): New static variable.
(print_usage): Adjust.
(options): Adjust.
(process_args): Adjust.
(open_files): Simplify. Cope when OBJECT_DIRECTORY is an object
file. Find modification date on bb file.
(read_profile): Don't rewind a NULL file.
(format_hwint): New static function.
(function_summary): Use format_hwint.
(output_data): SOURCE_FILE_NAME is never relative to
OBJECT_DIRECTORY. Use format_hwint. Adjust gcov file name
mangling. Adjust output format to make it more machine readable.
* doc/gcov.texi: Document & clarify semantics.
From-SVN: r56028
