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| .\" ======================================================================== |
| .\" |
| .IX Title "STRIP 1" |
| .TH STRIP 1 "2011-11-21" "binutils-2.21.90" "GNU Development Tools" |
| .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
| .\" way too many mistakes in technical documents. |
| .if n .ad l |
| .nh |
| .SH "NAME" |
| strip \- Discard symbols from object files. |
| .SH "SYNOPSIS" |
| .IX Header "SYNOPSIS" |
| strip [\fB\-F\fR \fIbfdname\fR |\fB\-\-target=\fR\fIbfdname\fR] |
| [\fB\-I\fR \fIbfdname\fR |\fB\-\-input\-target=\fR\fIbfdname\fR] |
| [\fB\-O\fR \fIbfdname\fR |\fB\-\-output\-target=\fR\fIbfdname\fR] |
| [\fB\-s\fR|\fB\-\-strip\-all\fR] |
| [\fB\-S\fR|\fB\-g\fR|\fB\-d\fR|\fB\-\-strip\-debug\fR] |
| [\fB\-K\fR \fIsymbolname\fR |\fB\-\-keep\-symbol=\fR\fIsymbolname\fR] |
| [\fB\-N\fR \fIsymbolname\fR |\fB\-\-strip\-symbol=\fR\fIsymbolname\fR] |
| [\fB\-w\fR|\fB\-\-wildcard\fR] |
| [\fB\-x\fR|\fB\-\-discard\-all\fR] [\fB\-X\fR |\fB\-\-discard\-locals\fR] |
| [\fB\-R\fR \fIsectionname\fR |\fB\-\-remove\-section=\fR\fIsectionname\fR] |
| [\fB\-o\fR \fIfile\fR] [\fB\-p\fR|\fB\-\-preserve\-dates\fR] |
| [\fB\-\-keep\-file\-symbols\fR] |
| [\fB\-\-only\-keep\-debug\fR] |
| [\fB\-v\fR |\fB\-\-verbose\fR] [\fB\-V\fR|\fB\-\-version\fR] |
| [\fB\-\-help\fR] [\fB\-\-info\fR] |
| \fIobjfile\fR... |
| .SH "DESCRIPTION" |
| .IX Header "DESCRIPTION" |
| \&\s-1GNU\s0 \fBstrip\fR discards all symbols from object files |
| \&\fIobjfile\fR. The list of object files may include archives. |
| At least one object file must be given. |
| .PP |
| \&\fBstrip\fR modifies the files named in its argument, |
| rather than writing modified copies under different names. |
| .SH "OPTIONS" |
| .IX Header "OPTIONS" |
| .IP "\fB\-F\fR \fIbfdname\fR" 4 |
| .IX Item "-F bfdname" |
| .PD 0 |
| .IP "\fB\-\-target=\fR\fIbfdname\fR" 4 |
| .IX Item "--target=bfdname" |
| .PD |
| Treat the original \fIobjfile\fR as a file with the object |
| code format \fIbfdname\fR, and rewrite it in the same format. |
| .IP "\fB\-\-help\fR" 4 |
| .IX Item "--help" |
| Show a summary of the options to \fBstrip\fR and exit. |
| .IP "\fB\-\-info\fR" 4 |
| .IX Item "--info" |
| Display a list showing all architectures and object formats available. |
| .IP "\fB\-I\fR \fIbfdname\fR" 4 |
| .IX Item "-I bfdname" |
| .PD 0 |
| .IP "\fB\-\-input\-target=\fR\fIbfdname\fR" 4 |
| .IX Item "--input-target=bfdname" |
| .PD |
| Treat the original \fIobjfile\fR as a file with the object |
| code format \fIbfdname\fR. |
| .IP "\fB\-O\fR \fIbfdname\fR" 4 |
| .IX Item "-O bfdname" |
| .PD 0 |
| .IP "\fB\-\-output\-target=\fR\fIbfdname\fR" 4 |
| .IX Item "--output-target=bfdname" |
| .PD |
| Replace \fIobjfile\fR with a file in the output format \fIbfdname\fR. |
| .IP "\fB\-R\fR \fIsectionname\fR" 4 |
| .IX Item "-R sectionname" |
| .PD 0 |
| .IP "\fB\-\-remove\-section=\fR\fIsectionname\fR" 4 |
| .IX Item "--remove-section=sectionname" |
| .PD |
| Remove any section named \fIsectionname\fR from the output file. This |
| option may be given more than once. Note that using this option |
| inappropriately may make the output file unusable. |
| .IP "\fB\-s\fR" 4 |
| .IX Item "-s" |
| .PD 0 |
| .IP "\fB\-\-strip\-all\fR" 4 |
| .IX Item "--strip-all" |
| .PD |
| Remove all symbols. |
| .IP "\fB\-g\fR" 4 |
| .IX Item "-g" |
| .PD 0 |
| .IP "\fB\-S\fR" 4 |
| .IX Item "-S" |
| .IP "\fB\-d\fR" 4 |
| .IX Item "-d" |
| .IP "\fB\-\-strip\-debug\fR" 4 |
| .IX Item "--strip-debug" |
| .PD |
| Remove debugging symbols only. |
| .IP "\fB\-\-strip\-unneeded\fR" 4 |
| .IX Item "--strip-unneeded" |
| Remove all symbols that are not needed for relocation processing. |
| .IP "\fB\-K\fR \fIsymbolname\fR" 4 |
| .IX Item "-K symbolname" |
| .PD 0 |
| .IP "\fB\-\-keep\-symbol=\fR\fIsymbolname\fR" 4 |
| .IX Item "--keep-symbol=symbolname" |
| .PD |
| When stripping symbols, keep symbol \fIsymbolname\fR even if it would |
| normally be stripped. This option may be given more than once. |
| .IP "\fB\-N\fR \fIsymbolname\fR" 4 |
| .IX Item "-N symbolname" |
| .PD 0 |
| .IP "\fB\-\-strip\-symbol=\fR\fIsymbolname\fR" 4 |
| .IX Item "--strip-symbol=symbolname" |
| .PD |
| Remove symbol \fIsymbolname\fR from the source file. This option may be |
| given more than once, and may be combined with strip options other than |
| \&\fB\-K\fR. |
| .IP "\fB\-o\fR \fIfile\fR" 4 |
| .IX Item "-o file" |
| Put the stripped output in \fIfile\fR, rather than replacing the |
| existing file. When this argument is used, only one \fIobjfile\fR |
| argument may be specified. |
| .IP "\fB\-p\fR" 4 |
| .IX Item "-p" |
| .PD 0 |
| .IP "\fB\-\-preserve\-dates\fR" 4 |
| .IX Item "--preserve-dates" |
| .PD |
| Preserve the access and modification dates of the file. |
| .IP "\fB\-w\fR" 4 |
| .IX Item "-w" |
| .PD 0 |
| .IP "\fB\-\-wildcard\fR" 4 |
| .IX Item "--wildcard" |
| .PD |
| Permit regular expressions in \fIsymbolname\fRs used in other command |
| line options. The question mark (?), asterisk (*), backslash (\e) and |
| square brackets ([]) operators can be used anywhere in the symbol |
| name. If the first character of the symbol name is the exclamation |
| point (!) then the sense of the switch is reversed for that symbol. |
| For example: |
| .Sp |
| .Vb 1 |
| \& \-w \-K !foo \-K fo* |
| .Ve |
| .Sp |
| would cause strip to only keep symbols that start with the letters |
| \&\*(L"fo\*(R", but to discard the symbol \*(L"foo\*(R". |
| .IP "\fB\-x\fR" 4 |
| .IX Item "-x" |
| .PD 0 |
| .IP "\fB\-\-discard\-all\fR" 4 |
| .IX Item "--discard-all" |
| .PD |
| Remove non-global symbols. |
| .IP "\fB\-X\fR" 4 |
| .IX Item "-X" |
| .PD 0 |
| .IP "\fB\-\-discard\-locals\fR" 4 |
| .IX Item "--discard-locals" |
| .PD |
| Remove compiler-generated local symbols. |
| (These usually start with \fBL\fR or \fB.\fR.) |
| .IP "\fB\-\-keep\-file\-symbols\fR" 4 |
| .IX Item "--keep-file-symbols" |
| When stripping a file, perhaps with \fB\-\-strip\-debug\fR or |
| \&\fB\-\-strip\-unneeded\fR, retain any symbols specifying source file names, |
| which would otherwise get stripped. |
| .IP "\fB\-\-only\-keep\-debug\fR" 4 |
| .IX Item "--only-keep-debug" |
| Strip a file, removing contents of any sections that would not be |
| stripped by \fB\-\-strip\-debug\fR and leaving the debugging sections |
| intact. In \s-1ELF\s0 files, this preserves all note sections in the output. |
| .Sp |
| The intention is that this option will be used in conjunction with |
| \&\fB\-\-add\-gnu\-debuglink\fR to create a two part executable. One a |
| stripped binary which will occupy less space in \s-1RAM\s0 and in a |
| distribution and the second a debugging information file which is only |
| needed if debugging abilities are required. The suggested procedure |
| to create these files is as follows: |
| .RS 4 |
| .IP "1.<Link the executable as normal. Assuming that is is called>" 4 |
| .IX Item "1.<Link the executable as normal. Assuming that is is called>" |
| \&\f(CW\*(C`foo\*(C'\fR then... |
| .ie n .IP "1.<Run ""objcopy \-\-only\-keep\-debug foo foo.dbg"" to>" 4 |
| .el .IP "1.<Run \f(CWobjcopy \-\-only\-keep\-debug foo foo.dbg\fR to>" 4 |
| .IX Item "1.<Run objcopy --only-keep-debug foo foo.dbg to>" |
| create a file containing the debugging info. |
| .ie n .IP "1.<Run ""objcopy \-\-strip\-debug foo"" to create a>" 4 |
| .el .IP "1.<Run \f(CWobjcopy \-\-strip\-debug foo\fR to create a>" 4 |
| .IX Item "1.<Run objcopy --strip-debug foo to create a>" |
| stripped executable. |
| .ie n .IP "1.<Run ""objcopy \-\-add\-gnu\-debuglink=foo.dbg foo"">" 4 |
| .el .IP "1.<Run \f(CWobjcopy \-\-add\-gnu\-debuglink=foo.dbg foo\fR>" 4 |
| .IX Item "1.<Run objcopy --add-gnu-debuglink=foo.dbg foo>" |
| to add a link to the debugging info into the stripped executable. |
| .RE |
| .RS 4 |
| .Sp |
| Note\-\-\-the choice of \f(CW\*(C`.dbg\*(C'\fR as an extension for the debug info |
| file is arbitrary. Also the \f(CW\*(C`\-\-only\-keep\-debug\*(C'\fR step is |
| optional. You could instead do this: |
| .IP "1.<Link the executable as normal.>" 4 |
| .IX Item "1.<Link the executable as normal.>" |
| .PD 0 |
| .ie n .IP "1.<Copy ""foo"" to ""foo.full"">" 4 |
| .el .IP "1.<Copy \f(CWfoo\fR to \f(CWfoo.full\fR>" 4 |
| .IX Item "1.<Copy foo to foo.full>" |
| .ie n .IP "1.<Run ""strip \-\-strip\-debug foo"">" 4 |
| .el .IP "1.<Run \f(CWstrip \-\-strip\-debug foo\fR>" 4 |
| .IX Item "1.<Run strip --strip-debug foo>" |
| .ie n .IP "1.<Run ""objcopy \-\-add\-gnu\-debuglink=foo.full foo"">" 4 |
| .el .IP "1.<Run \f(CWobjcopy \-\-add\-gnu\-debuglink=foo.full foo\fR>" 4 |
| .IX Item "1.<Run objcopy --add-gnu-debuglink=foo.full foo>" |
| .RE |
| .RS 4 |
| .PD |
| .Sp |
| i.e., the file pointed to by the \fB\-\-add\-gnu\-debuglink\fR can be the |
| full executable. It does not have to be a file created by the |
| \&\fB\-\-only\-keep\-debug\fR switch. |
| .Sp |
| Note\-\-\-this switch is only intended for use on fully linked files. It |
| does not make sense to use it on object files where the debugging |
| information may be incomplete. Besides the gnu_debuglink feature |
| currently only supports the presence of one filename containing |
| debugging information, not multiple filenames on a one-per-object-file |
| basis. |
| .RE |
| .IP "\fB\-V\fR" 4 |
| .IX Item "-V" |
| .PD 0 |
| .IP "\fB\-\-version\fR" 4 |
| .IX Item "--version" |
| .PD |
| Show the version number for \fBstrip\fR. |
| .IP "\fB\-v\fR" 4 |
| .IX Item "-v" |
| .PD 0 |
| .IP "\fB\-\-verbose\fR" 4 |
| .IX Item "--verbose" |
| .PD |
| Verbose output: list all object files modified. In the case of |
| archives, \fBstrip \-v\fR lists all members of the archive. |
| .IP "\fB@\fR\fIfile\fR" 4 |
| .IX Item "@file" |
| Read command-line options from \fIfile\fR. The options read are |
| inserted in place of the original @\fIfile\fR option. If \fIfile\fR |
| does not exist, or cannot be read, then the option will be treated |
| literally, and not removed. |
| .Sp |
| Options in \fIfile\fR are separated by whitespace. A whitespace |
| character may be included in an option by surrounding the entire |
| option in either single or double quotes. Any character (including a |
| backslash) may be included by prefixing the character to be included |
| with a backslash. The \fIfile\fR may itself contain additional |
| @\fIfile\fR options; any such options will be processed recursively. |
| .SH "SEE ALSO" |
| .IX Header "SEE ALSO" |
| the Info entries for \fIbinutils\fR. |
| .SH "COPYRIGHT" |
| .IX Header "COPYRIGHT" |
| Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Free Software Foundation, Inc. |
| .PP |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.3 |
| or any later version published by the Free Software Foundation; |
| with no Invariant Sections, with no Front-Cover Texts, and with no |
| Back-Cover Texts. A copy of the license is included in the |
| section entitled \*(L"\s-1GNU\s0 Free Documentation License\*(R". |
