You can specify a single input file and a single output filename.

If you specify many input filenames and specify an output directory, then the output from processing each file is written into the output directory. Each output filename is derived from the corresponding input file. Therefore, specifying an output directory in this way is the only method of converting many ELF files to a binary or hexadecimal format in a single run of fromelf.

If you specify an archive file as the input, then the output file is also an archive.

If you specify a pattern in parentheses to select a subset of objects from an archive, fromelf only converts the subset. All the other objects are passed through to the output archive unchanged.