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445 lines
15 KiB
Groff
445 lines
15 KiB
Groff
.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28)
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.\" ========================================================================
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.\"
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.IX Title "STRIP 1"
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.TH STRIP 1 "2016-01-25" "binutils-2.26" "GNU Development Tools"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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strip \- Discard symbols from object files.
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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strip [\fB\-F\fR \fIbfdname\fR |\fB\-\-target=\fR\fIbfdname\fR]
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[\fB\-I\fR \fIbfdname\fR |\fB\-\-input\-target=\fR\fIbfdname\fR]
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[\fB\-O\fR \fIbfdname\fR |\fB\-\-output\-target=\fR\fIbfdname\fR]
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[\fB\-s\fR|\fB\-\-strip\-all\fR]
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[\fB\-S\fR|\fB\-g\fR|\fB\-d\fR|\fB\-\-strip\-debug\fR]
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[\fB\-\-strip\-dwo\fR]
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[\fB\-K\fR \fIsymbolname\fR |\fB\-\-keep\-symbol=\fR\fIsymbolname\fR]
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[\fB\-N\fR \fIsymbolname\fR |\fB\-\-strip\-symbol=\fR\fIsymbolname\fR]
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[\fB\-w\fR|\fB\-\-wildcard\fR]
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[\fB\-x\fR|\fB\-\-discard\-all\fR] [\fB\-X\fR |\fB\-\-discard\-locals\fR]
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[\fB\-R\fR \fIsectionname\fR |\fB\-\-remove\-section=\fR\fIsectionname\fR]
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[\fB\-o\fR \fIfile\fR] [\fB\-p\fR|\fB\-\-preserve\-dates\fR]
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[\fB\-D\fR|\fB\-\-enable\-deterministic\-archives\fR]
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[\fB\-U\fR|\fB\-\-disable\-deterministic\-archives\fR]
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[\fB\-\-keep\-file\-symbols\fR]
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[\fB\-\-only\-keep\-debug\fR]
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[\fB\-v\fR |\fB\-\-verbose\fR] [\fB\-V\fR|\fB\-\-version\fR]
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[\fB\-\-help\fR] [\fB\-\-info\fR]
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\fIobjfile\fR...
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\s-1GNU \s0\fBstrip\fR discards all symbols from object files
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\&\fIobjfile\fR. The list of object files may include archives.
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At least one object file must be given.
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.PP
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\&\fBstrip\fR modifies the files named in its argument,
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rather than writing modified copies under different names.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.IP "\fB\-F\fR \fIbfdname\fR" 4
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.IX Item "-F bfdname"
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.PD 0
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.IP "\fB\-\-target=\fR\fIbfdname\fR" 4
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.IX Item "--target=bfdname"
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.PD
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Treat the original \fIobjfile\fR as a file with the object
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code format \fIbfdname\fR, and rewrite it in the same format.
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.IP "\fB\-\-help\fR" 4
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.IX Item "--help"
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Show a summary of the options to \fBstrip\fR and exit.
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.IP "\fB\-\-info\fR" 4
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.IX Item "--info"
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Display a list showing all architectures and object formats available.
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.IP "\fB\-I\fR \fIbfdname\fR" 4
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.IX Item "-I bfdname"
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.PD 0
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.IP "\fB\-\-input\-target=\fR\fIbfdname\fR" 4
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.IX Item "--input-target=bfdname"
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.PD
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Treat the original \fIobjfile\fR as a file with the object
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code format \fIbfdname\fR.
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.IP "\fB\-O\fR \fIbfdname\fR" 4
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.IX Item "-O bfdname"
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.PD 0
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.IP "\fB\-\-output\-target=\fR\fIbfdname\fR" 4
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.IX Item "--output-target=bfdname"
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.PD
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Replace \fIobjfile\fR with a file in the output format \fIbfdname\fR.
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.IP "\fB\-R\fR \fIsectionname\fR" 4
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.IX Item "-R sectionname"
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.PD 0
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.IP "\fB\-\-remove\-section=\fR\fIsectionname\fR" 4
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.IX Item "--remove-section=sectionname"
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.PD
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Remove any section named \fIsectionname\fR from the output file, in
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addition to whatever sections would otherwise be removed. This
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option may be given more than once. Note that using this option
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inappropriately may make the output file unusable. The wildcard
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character \fB*\fR may be given at the end of \fIsectionname\fR. If
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so, then any section starting with \fIsectionname\fR will be removed.
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.IP "\fB\-s\fR" 4
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.IX Item "-s"
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.PD 0
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.IP "\fB\-\-strip\-all\fR" 4
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.IX Item "--strip-all"
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.PD
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Remove all symbols.
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.IP "\fB\-g\fR" 4
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.IX Item "-g"
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.PD 0
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.IP "\fB\-S\fR" 4
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.IX Item "-S"
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.IP "\fB\-d\fR" 4
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.IX Item "-d"
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.IP "\fB\-\-strip\-debug\fR" 4
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.IX Item "--strip-debug"
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.PD
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Remove debugging symbols only.
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.IP "\fB\-\-strip\-dwo\fR" 4
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.IX Item "--strip-dwo"
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Remove the contents of all \s-1DWARF \s0.dwo sections, leaving the
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remaining debugging sections and all symbols intact.
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See the description of this option in the \fBobjcopy\fR section
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for more information.
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.IP "\fB\-\-strip\-unneeded\fR" 4
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.IX Item "--strip-unneeded"
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Remove all symbols that are not needed for relocation processing.
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.IP "\fB\-K\fR \fIsymbolname\fR" 4
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.IX Item "-K symbolname"
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.PD 0
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.IP "\fB\-\-keep\-symbol=\fR\fIsymbolname\fR" 4
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.IX Item "--keep-symbol=symbolname"
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.PD
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When stripping symbols, keep symbol \fIsymbolname\fR even if it would
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normally be stripped. This option may be given more than once.
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.IP "\fB\-N\fR \fIsymbolname\fR" 4
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.IX Item "-N symbolname"
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.PD 0
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.IP "\fB\-\-strip\-symbol=\fR\fIsymbolname\fR" 4
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.IX Item "--strip-symbol=symbolname"
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.PD
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Remove symbol \fIsymbolname\fR from the source file. This option may be
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given more than once, and may be combined with strip options other than
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\&\fB\-K\fR.
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.IP "\fB\-o\fR \fIfile\fR" 4
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.IX Item "-o file"
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Put the stripped output in \fIfile\fR, rather than replacing the
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existing file. When this argument is used, only one \fIobjfile\fR
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argument may be specified.
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.IP "\fB\-p\fR" 4
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.IX Item "-p"
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.PD 0
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.IP "\fB\-\-preserve\-dates\fR" 4
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.IX Item "--preserve-dates"
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.PD
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Preserve the access and modification dates of the file.
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.IP "\fB\-D\fR" 4
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.IX Item "-D"
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.PD 0
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.IP "\fB\-\-enable\-deterministic\-archives\fR" 4
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.IX Item "--enable-deterministic-archives"
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.PD
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Operate in \fIdeterministic\fR mode. When copying archive members
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and writing the archive index, use zero for UIDs, GIDs, timestamps,
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and use consistent file modes for all files.
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.Sp
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If \fIbinutils\fR was configured with
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\&\fB\-\-enable\-deterministic\-archives\fR, then this mode is on by default.
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It can be disabled with the \fB\-U\fR option, below.
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.IP "\fB\-U\fR" 4
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.IX Item "-U"
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.PD 0
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.IP "\fB\-\-disable\-deterministic\-archives\fR" 4
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.IX Item "--disable-deterministic-archives"
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.PD
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Do \fInot\fR operate in \fIdeterministic\fR mode. This is the
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inverse of the \fB\-D\fR option, above: when copying archive members
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and writing the archive index, use their actual \s-1UID, GID,\s0 timestamp,
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and file mode values.
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.Sp
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This is the default unless \fIbinutils\fR was configured with
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\&\fB\-\-enable\-deterministic\-archives\fR.
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.IP "\fB\-w\fR" 4
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.IX Item "-w"
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.PD 0
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.IP "\fB\-\-wildcard\fR" 4
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.IX Item "--wildcard"
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.PD
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Permit regular expressions in \fIsymbolname\fRs used in other command
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line options. The question mark (?), asterisk (*), backslash (\e) and
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square brackets ([]) operators can be used anywhere in the symbol
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name. If the first character of the symbol name is the exclamation
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|
point (!) then the sense of the switch is reversed for that symbol.
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|
For example:
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.Sp
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.Vb 1
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\& \-w \-K !foo \-K fo*
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.Ve
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.Sp
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would cause strip to only keep symbols that start with the letters
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\&\*(L"fo\*(R", but to discard the symbol \*(L"foo\*(R".
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.IP "\fB\-x\fR" 4
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.IX Item "-x"
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.PD 0
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.IP "\fB\-\-discard\-all\fR" 4
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.IX Item "--discard-all"
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.PD
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Remove non-global symbols.
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.IP "\fB\-X\fR" 4
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.IX Item "-X"
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.PD 0
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.IP "\fB\-\-discard\-locals\fR" 4
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.IX Item "--discard-locals"
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.PD
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Remove compiler-generated local symbols.
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(These usually start with \fBL\fR or \fB.\fR.)
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.IP "\fB\-\-keep\-file\-symbols\fR" 4
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.IX Item "--keep-file-symbols"
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When stripping a file, perhaps with \fB\-\-strip\-debug\fR or
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\&\fB\-\-strip\-unneeded\fR, retain any symbols specifying source file names,
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which would otherwise get stripped.
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.IP "\fB\-\-only\-keep\-debug\fR" 4
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.IX Item "--only-keep-debug"
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Strip a file, emptying the contents of any sections that would not be
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stripped by \fB\-\-strip\-debug\fR and leaving the debugging sections
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intact. In \s-1ELF\s0 files, this preserves all the note sections in the
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output as well.
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.Sp
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Note \- the section headers of the stripped sections are preserved,
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including their sizes, but the contents of the section are discarded.
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The section headers are preserved so that other tools can match up the
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debuginfo file with the real executable, even if that executable has
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been relocated to a different address space.
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.Sp
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The intention is that this option will be used in conjunction with
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\&\fB\-\-add\-gnu\-debuglink\fR to create a two part executable. One a
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stripped binary which will occupy less space in \s-1RAM\s0 and in a
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distribution and the second a debugging information file which is only
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needed if debugging abilities are required. The suggested procedure
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to create these files is as follows:
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.RS 4
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.IP "1.<Link the executable as normal. Assuming that is is called>" 4
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.IX Item "1.<Link the executable as normal. Assuming that is is called>"
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\&\f(CW\*(C`foo\*(C'\fR then...
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.ie n .IP "1.<Run ""objcopy \-\-only\-keep\-debug foo foo.dbg"" to>" 4
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.el .IP "1.<Run \f(CWobjcopy \-\-only\-keep\-debug foo foo.dbg\fR to>" 4
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.IX Item "1.<Run objcopy --only-keep-debug foo foo.dbg to>"
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create a file containing the debugging info.
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.ie n .IP "1.<Run ""objcopy \-\-strip\-debug foo"" to create a>" 4
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.el .IP "1.<Run \f(CWobjcopy \-\-strip\-debug foo\fR to create a>" 4
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.IX Item "1.<Run objcopy --strip-debug foo to create a>"
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stripped executable.
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.ie n .IP "1.<Run ""objcopy \-\-add\-gnu\-debuglink=foo.dbg foo"">" 4
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.el .IP "1.<Run \f(CWobjcopy \-\-add\-gnu\-debuglink=foo.dbg foo\fR>" 4
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.IX Item "1.<Run objcopy --add-gnu-debuglink=foo.dbg foo>"
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to add a link to the debugging info into the stripped executable.
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.RE
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.RS 4
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.Sp
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Note\-\-\-the choice of \f(CW\*(C`.dbg\*(C'\fR as an extension for the debug info
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file is arbitrary. Also the \f(CW\*(C`\-\-only\-keep\-debug\*(C'\fR step is
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optional. You could instead do this:
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.IP "1.<Link the executable as normal.>" 4
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.IX Item "1.<Link the executable as normal.>"
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.PD 0
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.ie n .IP "1.<Copy ""foo"" to ""foo.full"">" 4
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.el .IP "1.<Copy \f(CWfoo\fR to \f(CWfoo.full\fR>" 4
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.IX Item "1.<Copy foo to foo.full>"
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.ie n .IP "1.<Run ""strip \-\-strip\-debug foo"">" 4
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.el .IP "1.<Run \f(CWstrip \-\-strip\-debug foo\fR>" 4
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.IX Item "1.<Run strip --strip-debug foo>"
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.ie n .IP "1.<Run ""objcopy \-\-add\-gnu\-debuglink=foo.full foo"">" 4
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.el .IP "1.<Run \f(CWobjcopy \-\-add\-gnu\-debuglink=foo.full foo\fR>" 4
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.IX Item "1.<Run objcopy --add-gnu-debuglink=foo.full foo>"
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.RE
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.RS 4
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.PD
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.Sp
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i.e., the file pointed to by the \fB\-\-add\-gnu\-debuglink\fR can be the
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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\-2015 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".
|