strip 命令

strip 命令

用途

通过除去绑定程序和符号调试程序使用的信息，减少扩展公共对象文件格式（XCOFF）的对象文件的大小。

语法

strip [ -V] [ -r [  -l ] |  -x [ -l ] |  -t |  -H | -e |  -E ] [  -X  {32|64|32_64}] [ -- ]  File ...

描述

strip 命令减少 XCOFF 对象文件的大小。strip 命令从 XCOFF 对象文件中有选择地除去行号信息、重定位信息、调试段、typchk 段、注释段、文件头以及所有或部分符号表。一旦您使用该命令，则很难调试文件的符号；因此，通常应该只在已经调试和测试过的生成模块上使用 strip 命令。使用strip 命令减少对象文件所需的存储量开销。

对于每个对象模块，strip 命令除去给出的选项所指定的信息。对于每个归档文件，strip 命令从归档中除去全局符号表。

可以使用 ar -s 命令将除去的符号表恢复到归档文件或库文件中。

没有选项的 strip 命令除去行号信息、重定位信息、符号表、调试段、typchk 段和注释段。

标志

-e在对象文件的可选头中设置 F_LOADONLY 标志。如果对象文件放置在归档中，则该标志告知绑定程序（ld 命令），在与此归档链接时应忽略该对象文件中的符号。-E复位（关闭）对象文件的可选头中的 F_LOADONLY 位。（请参阅 -e 标志。）-H除去对象文件头、任何可选的头以及所有段的头部分。

注：不除去符号表信息。

-l（小写 L）从对象文件中除去行号信息。

-r除了外部符号和静态符号条目，将全部符号表信息除去。不除去重定位信息。同时除去调试段和 typchk 段。这个选项产生一个对象文件，该对象文件仍可以用作输入到链接编辑器（ld 命令）中。-t除去大多数符号表信息，但并不除去函数符号或行号信息。-V打印 strip 命令的版本号。-x除去符号表信息，但并不除去静态或外部符号信息。-x 标志同时除去重定位信息，因此将不可能链接到该文件。-X mode指定应检查 strip 的对象文件的类型。mode 必须是下列之一：

32

只处理 32 位对象文件

64

只处理 64 位对象文件

32_64

既处理 32 位对象文件，又处理 64 位对象文件

缺省值是处理 32 位对象文件（忽略 64 位对象文件）。也可以用 OBJECT_MODE 环境变量来设置mode。例如，OBJECT_MODE=64 使 strip 处理任何 64 位对象文件，并忽略 32 位对象文件。-X 标志重设 OBJECT_MODE 变量。

--（双连字符）将跟随在该标志后的所有参数解释为文件名。这就允许除去名称是以连字符开始的文件。

退出状态

该命令返回以下退出值：

0成功完成。>0出错。

示例

1. 要除去 a.out 文件中的符号表和行号信息，请输入：

   strip a.out

2. 要除去 a.out 文件中的对象文件头，请输入：

   strip -H a.out

3. 要除去 lib.a 中的 32 位和 64 位符号表，请输入：

   strip -X 32_64 lib.a

文件

/usr/ccs/bin/strip包含 strip 命令。

///
$ man strip
STRIP(1)                     GNU Development Tools                    STRIP(1)


NAME
       strip - Discard symbols from object files.


SYNOPSIS
       strip [-F bfdname |--target=bfdname]
             [-I bfdname |--input-target=bfdname]
             [-O bfdname |--output-target=bfdname]
             [-s|--strip-all]
             [-S|-g|-d|--strip-debug]
             [-K symbolname |--keep-symbol=symbolname]
             [-N symbolname |--strip-symbol=symbolname]
             [-w|--wildcard]
             [-x|--discard-all] [-X |--discard-locals]
             [-R sectionname |--remove-section=sectionname]
             [-o file] [-p|--preserve-dates]
             [--keep-file-symbols]
             [--only-keep-debug]
             [-v |--verbose] [-V|--version]
             [--help] [--info]
             objfile...


DESCRIPTION
       GNU strip discards all symbols from object files objfile.  The list of object files may include archives.
       At least one object file must be given.


       strip modifies the files named in its argument, rather than writing modified copies under different
       names.


OPTIONS
       -F bfdname
       --target=bfdname
           Treat the original objfile as a file with the object code format bfdname, and rewrite it in the same
           format.


       --help
           Show a summary of the options to strip and exit.


       --info
           Display a list showing all architectures and object formats available.


       -I bfdname
       --input-target=bfdname
           Treat the original objfile as a file with the object code format bfdname.


       -O bfdname
       --output-target=bfdname
           Replace objfile with a file in the output format bfdname.


       -R sectionname
       --remove-section=sectionname
           Remove any section named sectionname from the output file.  This option may be given more than once.
           Note that using this option inappropriately may make the output file unusable.


       -s
       --strip-all
           Remove all symbols.


       -g
       -S
       -d
       --strip-debug
           Remove debugging symbols only.


       --strip-unneeded
           Remove all symbols that are not needed for relocation processing.


       -K symbolname
       --keep-symbol=symbolname
           When stripping symbols, keep symbol symbolname even if it would normally be stripped.  This option
           may be given more than once.


       -N symbolname
       --strip-symbol=symbolname
           Remove symbol symbolname from the source file. This option may be given more than once, and may be
           combined with strip options other than -K.


       -o file
           Put the stripped output in file, rather than replacing the existing file.  When this argument is
           used, only one objfile argument may be specified.


       -p
       --preserve-dates
           Preserve the access and modification dates of the file.


       -w
       --wildcard
           Permit regular expressions in symbolnames used in other command line options.  The question mark (?),
           asterisk (*), backslash (\) 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:


                     -w -K !foo -K fo*


           would cause strip to only keep symbols that start with the letters "fo", but to discard the symbol
           "foo".


       -x
       --discard-all
           Remove non-global symbols.


       -X
       --discard-locals
           Remove compiler-generated local symbols.  (These usually start with L or ..)


       --keep-file-symbols
           When stripping a file, perhaps with --strip-debug or --strip-unneeded, retain any symbols specifying
           source file names, which would otherwise get stripped.


       --only-keep-debug
           Strip a file, removing contents of any sections that would not be stripped by --strip-debug and
           leaving the debugging sections intact.  In ELF files, this preserves all note sections in the output.


           The intention is that this option will be used in conjunction with --add-gnu-debuglink to create a
           two part executable.  One a stripped binary which will occupy less space in RAM 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:


           1.<Link the executable as normal.  Assuming that is is called>
               "foo" then...


           1.<Run "objcopy --only-keep-debug foo foo.dbg" to>
               create a file containing the debugging info.


           1.<Run "objcopy --strip-debug foo" to create a>
               stripped executable.


           1.<Run "objcopy --add-gnu-debuglink=foo.dbg foo">
               to add a link to the debugging info into the stripped executable.


           Note---the choice of ".dbg" as an extension for the debug info file is arbitrary.  Also the
           "--only-keep-debug" step is optional.  You could instead do this:


           1.<Link the executable as normal.>
           1.<Copy "foo" to "foo.full">
           1.<Run "strip --strip-debug foo">
           1.<Run "objcopy --add-gnu-debuglink=foo.full foo">


           i.e., the file pointed to by the --add-gnu-debuglink can be the full executable.  It does not have to
           be a file created by the --only-keep-debug switch.


           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.


       -V
       --version
           Show the version number for strip.


       -v
       --verbose
           Verbose output: list all object files modified.  In the case of archives, strip -v lists all members
           of the archive.


       @file
           Read command-line options from file.  The options read are inserted in place of the original @file
           option.  If file does not exist, or cannot be read, then the option will be treated literally, and
           not removed.


           Options in file 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 file may
           itself contain additional @file options; any such options will be processed recursively.


SEE ALSO
       the Info entries for binutils.


COPYRIGHT
       Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
       2006, 2007, 2008, 2009 Free Software Foundation, Inc.


       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU 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