.TH LIPO 1 "August 31, 2018" "Apple Computer, Inc." .SH NAME lipo \- create or operate on universal files .SH SYNOPSIS .B lipo .IR input_file .IR command .IR [option ...] .SH DESCRIPTION The .B lipo tool creates or operates on ``universal'' (multi-architecture) files. Generally, .B lipo reads a single input file and writes to a single output file, although some commands and options accept multiple input files. .B lipo will only ever write to a single output file, and input files are never modified in place. .PP .B lipo supports a number of commands for creating universal files from single-architecture files, extracting single-architecture files from universal files, and displaying architecture information. .B lipo can only perform one such command at a time, although some command flags may appear more than once. Some commands support additional options that can be used with that command. In addition, there are global options that are supported by multiple commands. .PP The .I arch_type arguments may be any of the supported architecture names listed in the man page .IR arch (3). .SH COMMANDS .TP .B \-archs Display only the architecture names present in a single input file. Each architecture name is a single word, making this option suitable for shell scripting. Unknown architectures will be represented by "unknown" along with the numeric CPU type and CPU subtype values as a single word. .TP .BI \-create " [\-arch_blank arch_type ...]" Create one universal output file from one or more input files. When input files specified on the command-line, all of the architectures in each file will be copied into the output file, whereas when input files are included using the global .B \-arch option, only the specified architecture will be copied from that input file. The .B \-arch_blank option specifies that the output for the specified .I arch_type will be an MH_DYLIB_STUB file. This command requires the .B \-output option. .TP .BI \-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). .TP .BI \-extract " arch_type [\-extract arch_type...]" Take one universal input file and copy the .I arch_type from that universal file into a universal output file containing only that architecture. This command requires the .B \-output option. .TP .BI \-extract_family " arch_type [\-extract_family arch_type...]" Take one universal input file and copy all of the .IR arch_type s for the family that .I 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. This command requires the .B \-output option. .TP .BI \-info Display a brief description of each input file along with the names of each architecture type in that input file. .TP .BI \-remove " arch_type [\-remove arch_type ...]" Take one universal input file and remove the .I arch_type from that universal file, placing the result in the output file. This command requires the .B \-output option. .TP .BI \-replace " arch_type file_name [\-replace arch_type file_name...]" Take one universal input file; in the output file, replace the .I arch_type contents of the input file with the contents of the specified .IR file_name . This command requires the .B \-output option. .TP .BI \-thin " arch_type" Take one input file and create a thin output file with the specified arch_type. This command requires the .B \-output option. .TP .BI \-verify_arch " arch_type ..." Take one input file and verify the specified .IR arch_type s are present in the file. If so then exit with a status of 0 else exit with a status of 1. Because more than one .I arch_type can be verified at once, all of the input files must appear before the .B \-verify_arch flag on the command-line. .SH OPTIONS .TP .BI \-arch " arch_type input_file" Tells .B lipo that .I input_file contains the specified architecture type. The .BI \-arch " arch_type" specification is unnecessary if .I input_file is an object file, a universal file, or some other file whose architecture(s) .B lipo can figure out. .TP .BI \-hideARM64 When creating a universal binary including both 32-bit and 64-bit ARM files, this option will ask .B lipo to add the 64-bit files at the end and not include them in the count of architectures present in the file. The files must be executable files (Mach-O filetype MH_EXECUTE). This option has no effect if neither 32-bit ARM nor 64-bit ARM files are present, and no other files may be hidden in this way. This option only works with the .B \-create, .B \-remove, and .B \-replace, commands, and is only intended for tools and workflows testing a workaround on older systems. .TP .BI \-output " output_file" Commands that create new files write to the output file specified by the .B \-output flag. This option is required for the .B \-create, .B \-extract, .B \-extract_family, .B \-remove, .B \-replace, and .B \-thin commands. .TP .BI \-segalign " arch_type value" Set the segment alignment of the specified .I arch_type when creating a universal file containing that architecture. .I value is a hexadecimal number that must be an integral power of 2. This is only needed when .B 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 .B 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). .SH "SEE ALSO" arch(3)