Mac OS X / Darwin man pages : lipo (1)
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lipo - create or operate on fat files
lipo [-info] [-detailed_info] [-arch arch_type input_file] ... [
input_file] ... [-create] [-thin arch_type] [-replace arch_type file_name]
... [-remove arch_type] ... [-extract arch_type] ...
[-extract_family arch_type] ... [-output output_file] [-segalign
arch_type value] ...
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)
-info Briefly list the architecture types in the input fat file (just
the names of each architecture).
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.
Take the input files (or file) and create one fat output file
- -thin arch_type
Take one input file and create a thin output file with the specified
- -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
- -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).
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