If you do not specify a member, ar adds file to the end of the archive. Places file in archive before the member specified by posname. If you do not specify posname, ar adds file to the beginning of the archive. Prevents ar from overwriting existing files with extracted files. You can only specify this option when extracting files with the -x option.
Valid formats are omf and coff .
Inserts the file into the archive before the member specified by posname. If you do not specify posname, ar inserts file at the beginning of the archive. This option is the same as -b . Normally, the case is significant. Puts any temporary files that ar generates in the current directory rather than the default temporary file directory.