lipo - create or operate on universal files lipo [-info] [-detailed_info] [-arch "arch_type input_file" "] ..." [ input_file "] ..." [-arch_blank arch_type ] [-create] [-thin arch_type ] [-replace "arch_type filename" "] ..." [-remove arch_type "] ..." [-extract arch_type "] ..." [-extract_family arch_type "] ..." [-verify_arch arch_type " ...] " [-output output_file ] [-segalign "arch_type value" "] ..." The lipo command creates or operates on ``universal'' (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 universal file; creating a single universal file from one or more input files; thinning out a single universal file to one specified architecture type; and extracting, replacing, and/or removing architectures types from the input file to create a single new universal output file.

Only one option can be specified, with the exception of -arch , -arch_blank , -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).

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

-detailed_info Display a detailed list of the architecture types in the input universal file (all the the information in the universal 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 universal file, or some other file whose architecture(s) lipo can figure out.

-arch_blank " arch_type" Specifies that the output for the specified arch_type will be an MH_DYLIB_STUB file. This flag may not be used with any operation other than -create .

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

-create Take the input files (or file) and create one universal 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 universal 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 universal input file and remove the arch_type from that universal file, placing the result in the output file.

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

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

-verify_arch " arch_type ..." Take one input file and verify the specified arch_type s are present in the file. If so then exit with a status of 0 else exit with a status of 1.

-segalign " arch_type value" Set the segment alignment of the specified arch_type when creating a universal 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).

arch(3)