5.7.2.4 O: Specify Output File

The -o option specifies the base name and directory of the output file.

The option -o main.elf, for example, will place the generated output in a file called main.elf. The name of an existing directory can be specified with the file name, for example -o build/main.elf, so that the output file will appear in that directory.

This option also controls the output base name of dump and aux files.

You cannot use this option to change the type (format) of the output file.