1LLVM-STRIP(1) LLVM LLVM-STRIP(1)
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6 llvm-strip - object stripping tool
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9 llvm-strip [options] inputs...
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12 llvm-strip is a tool to strip sections and symbols from object files.
13 If no other stripping or remove options are specified, --strip-all will
14 be enabled.
15 By default, the input files are modified in-place. If "-" is specified
17 for the input file, the input is read from the program's standard input
18 stream.
19 If the input is an archive, any requested operations will be applied to
21 each archive member individually.
22 The tool is still in active development, but in most scenarios it works
24 as a drop-in replacement for GNU's strip.
25
27 The following options are either agnostic of the file format, or apply
28 to multiple file formats.
29 --disable-deterministic-archives, -U
31 Use real values for UIDs, GIDs and timestamps when updating ar‐
32 chive member headers.
33 --discard-all, -x
35 Remove most local symbols from the output. Different file for‐
36 mats may limit this to a subset of the local symbols. For exam‐
37 ple, file and section symbols in ELF objects will not be dis‐
38 carded. Additionally, remove all debug sections.
39 --enable-deterministic-archives, -D
41 Enable deterministic mode when stripping archives, i.e. use 0
42 for archive member header UIDs, GIDs and timestamp fields. On by
43 default.
44 --help, -h
46 Print a summary of command line options.
47 --no-strip-all
49 Disable --strip-all.
50 -o <file>
52 Write output to <file>. Multiple input files cannot be used in
53 combination with -o.
54 --only-keep-debug
56 Produce a debug file as the output that only preserves contents
57 of sections useful for debugging purposes.
58 For ELF objects, this removes the contents of SHF_ALLOC sections
60 that are not SHT_NOTE by making them SHT_NOBITS and shrinking
61 the program headers where possible.
62 --regex
64 If specified, symbol and section names specified by other
65 switches are treated as extended POSIX regular expression pat‐
66 terns.
67 --remove-section <section>, -R
69 Remove the specified section from the output. Can be specified
70 multiple times to remove multiple sections simultaneously.
71 --strip-all-gnu
73 Remove all symbols, debug sections and relocations from the out‐
74 put. This option is equivalent to GNU strip's --strip-all
75 switch.
76 --strip-all, -s
78 For ELF objects, remove from the output all symbols and non-al‐
79 loc sections not within segments, except for .gnu.warning,
80 .ARM.attribute sections and the section name table.
81 For COFF objects, remove all symbols, debug sections, and relo‐
83 cations from the output.
84 --strip-debug, -d, -g, -S
86 Remove all debug sections from the output.
87 --strip-symbol <symbol>, -N
89 Remove all symbols named <symbol> from the output. Can be speci‐
90 fied multiple times to remove multiple symbols.
91 --strip-unneeded
93 Remove from the output all local or undefined symbols that are
94 not required by relocations. Also remove all debug sections.
95 --version, -V
97 Display the version of the llvm-strip executable.
98 --wildcard, -w
100 Allow wildcard syntax for symbol-related flags. On by default
101 for section-related flags. Incompatible with --regex.
102 Wildcard syntax allows the following special symbols:
104 ┌───────────────┬─────────────────────┬────────────┐
106 │Character │ Meaning │ Equivalent │
107 ├───────────────┼─────────────────────┼────────────┤
108 │* │ Any number of char‐ │ .* │
109 │ │ acters │ │
110 ├───────────────┼─────────────────────┼────────────┤
111 │? │ Any single charac‐ │ . │
112 │ │ ter │ │
113 ├───────────────┼─────────────────────┼────────────┤
114 │\ │ Escape the next │ \ │
115 │ │ character │ │
116 ├───────────────┼─────────────────────┼────────────┤
117 │[a-z] │ Character class │ [a-z] │
118 ├───────────────┼─────────────────────┼────────────┤
119 │[!a-z], [^a-z] │ Negated character │ [^a-z] │
120 │ │ class │ │
121 └───────────────┴─────────────────────┴────────────┘
122 Additionally, starting a wildcard with '!' will prevent a match,
124 even if another flag matches. For example -w -N '*' -N '!x' will
125 strip all symbols except for x.
126 The order of wildcards does not matter. For example, -w -N '*'
128 -N '!x' is the same as -w -N '!x' -N '*'.
129 @<FILE>
131 Read command-line options and commands from response file
132 <FILE>.
133
135 The following options are implemented only for ELF objects. If used
136 with other objects, llvm-strip will either emit an error or silently
137 ignore them.
138 --allow-broken-links
140 Allow llvm-strip to remove sections even if it would leave in‐
141 valid section references. Any invalid sh_link fields will be set
142 to zero.
143 --discard-locals, -X
145 Remove local symbols starting with ".L" from the output.
146 --keep-file-symbols
148 Keep symbols of type STT_FILE, even if they would otherwise be
149 stripped.
150 --keep-section <section>
152 When removing sections from the output, do not remove sections
153 named <section>. Can be specified multiple times to keep multi‐
154 ple sections.
155 --keep-symbol <symbol>, -K
157 When removing symbols from the output, do not remove symbols
158 named <symbol>. Can be specified multiple times to keep multiple
159 symbols.
160 --preserve-dates, -p
162 Preserve access and modification timestamps in the output.
163 --strip-sections
165 Remove from the output all section headers and all section data
166 not within segments. Note that many tools will not be able to
167 use an object without section headers.
168 -T Remove Swift symbols.
170
172 llvm-strip exits with a non-zero exit code if there is an error. Oth‐
173 erwise, it exits with code 0.
174
176 To report bugs, please visit <‐
177 https://github.com/llvm/llvm-project/labels/tools:llvm-obj‐
178 copy%2Fstrip>.
179
181 llvm-objcopy(1)
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184 Maintained by the LLVM Team (https://llvm.org/).
185
187 2003-2023, LLVM Project
18815 2023-01-12 LLVM-STRIP(1)