LIPO(1)

NAME
lipo - create or operate on fat files

SYNOPSIS
lipo [-info] [-detailed_info] [-arch arch_type input_file] ... [ input_file] ... [-create] [-thin arch_type] [-replace arch_type filename] ... [-remove arch_type] ... [-extract arch_type] ... [-extract_family arch_type] ... [-output output_file] [-segalign arch_type value] ...

DESCRIPTION
The lipo command creates or operates on ``fat'' (multi-architecture) files. It only ever produces one output file, and never alters the input file. The operations that lipo performs are: listing the architecture types in a fat file; creating a single fat file from one or more input files; thinning out a single fat file to one specified architecture type; and extracting, replacing, and/or removing architectures types from the input file to create a single new fat output file.

Only one option can be specified, with the exception of -arch, -output, and -segalign, which are used in combination with other options. The input_file argument is required, and only the -create option allows more than one input_file to be specified. The -output flag must be used, except with the -info and -detailed_info flags.

The arch_type arguments may be any of the supported architecture names listed in the man page arch(3).

OPTIONS

-info
    Briefly list the architecture types in the input fat file (just the names of each architecture).

-detailed_info
    Display a detailed list of the architecture types in the input fat file (all the the information in the fat header, for each architecture in the file).

-arch arch_type input_file
    Tells lipo that input_file contains the specified architecture type. The -arch arch_type specification is unnecessary if input_file is an object file, a fat file, or some other file whose architecture(s) lipo can figure out.

-output output_file
    Specifies its argument to be the output file.

-create
    Take the input files (or file) and create one fat output file from them.

-thin arch_type
    Take one input file and create a thin output file with the specified arch_type.

-replace arch_type file_name
    Take one fat input file; in the output file, replace the arch_type contents of the input file with the contents of the specified file_name.

-remove arch_type
    Take one fat input file and remove the arch_type from that fat file, placing the result in the output file.

-extract arch_type
    Take one fat input file and copy the arch_type from that fat file into a fat output file containing only that architecture.

-extract_family arch_type
    Take one fat input file and copy all of the arch_types for the family that arch_type is in from that fat file into an output file containing only those architectures. The file will be thin if only one architecture is found or fat otherwise.

-segalign arch_type value
    Set the segment alignment of the specified arch_type when creating a fat file containing that architecture. value is a hexadecimal number that must be an integral power of 2. This is only needed when lipo can't figure out the alignment of an input file (currently not an object file), or when it guesses at the alignment too conservatively. The default for files unknown to lipo is 0 (2^0, or an alignment of one byte), and the default alignment for archives is 4 (2^2, or 4-byte alignment).

SEE ALSO
arch(3)