1LLVM-STRIP(1) LLVM LLVM-STRIP(1)
2
6 llvm-strip - object stripping tool
7
9 llvm-strip [options] inputs...
10
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.
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 --regex
56 If specified, symbol and section names specified by other
57 switches are treated as extended POSIX regular expression pat‐
58 terns.
59 --remove-section <section>, -R
61 Remove the specified section from the output. Can be specified
62 multiple times to remove multiple sections simultaneously.
63 --strip-all-gnu
65 Remove all symbols, debug sections and relocations from the out‐
66 put. This option is equivalent to GNU strip's --strip-all
67 switch.
68 --strip-all, -S
70 For ELF objects, remove from the output all symbols and non-al‐
71 loc sections not within segments, except for .gnu.warning,
72 .ARM.attribute sections and the section name table.
73 For COFF objects, remove all symbols, debug sections, and relo‐
75 cations from the output.
76 --strip-debug, -g
78 Remove all debug sections from the output.
79 --strip-symbol <symbol>, -N
81 Remove all symbols named <symbol> from the output. Can be speci‐
82 fied multiple times to remove multiple symbols.
83 --strip-unneeded
85 Remove from the output all local or undefined symbols that are
86 not required by relocations. Also remove all debug sections.
87 --version, -V
89 Display the version of the llvm-strip executable.
90 --wildcard, -w
92 Allow wildcard syntax for symbol-related flags. On by default
93 for section-related flags. Incompatible with --regex.
94 Wildcard syntax allows the following special symbols:
96 ┌───────────────┬─────────────────────┬────────────┐
98 │Character │ Meaning │ Equivalent │
99 ├───────────────┼─────────────────────┼────────────┤
100 │* │ Any number of char‐ │ .* │
101 │ │ acters │ │
102 ├───────────────┼─────────────────────┼────────────┤
103 │? │ Any single charac‐ │ . │
104 │ │ ter │ │
105 ├───────────────┼─────────────────────┼────────────┤
106 │\ │ Escape the next │ \ │
107 │ │ character │ │
108 ├───────────────┼─────────────────────┼────────────┤
109 │[a-z] │ Character class │ [a-z] │
110 ├───────────────┼─────────────────────┼────────────┤
111 │[!a-z], [^a-z] │ Negated character │ [^a-z] │
112 │ │ class │ │
113 └───────────────┴─────────────────────┴────────────┘
114 Additionally, starting a wildcard with '!' will prevent a match,
116 even if another flag matches. For example -w -N '*' -N '!x' will
117 strip all symbols except for x.
118 The order of wildcards does not matter. For example, -w -N '*'
120 -N '!x' is the same as -w -N '!x' -N '*'.
121 @<FILE>
123 Read command-line options and commands from response file
124 <FILE>.
125
127 The following options are implemented only for COFF objects. If used
128 with other objects, llvm-strip will either emit an error or silently
129 ignore them.
130 --only-keep-debug
132 Remove the contents of non-debug sections from the output, but
133 keep the section headers.
134
136 The following options are implemented only for ELF objects. If used
137 with other objects, llvm-strip will either emit an error or silently
138 ignore them.
139 --allow-broken-links
141 Allow llvm-strip to remove sections even if it would leave in‐
142 valid section references. Any invalid sh_link fields will be set
143 to zero.
144 --discard-locals, -X
146 Remove local symbols starting with ".L" from the output.
147 --keep-file-symbols
149 Keep symbols of type STT_FILE, even if they would otherwise be
150 stripped.
151 --keep-section <section>
153 When removing sections from the output, do not remove sections
154 named <section>. Can be specified multiple times to keep multi‐
155 ple sections.
156 --keep-symbol <symbol>, -K
158 When removing symbols from the output, do not remove symbols
159 named <symbol>. Can be specified multiple times to keep multiple
160 symbols.
161 --preserve-dates, -p
163 Preserve access and modification timestamps in the output.
164 --strip-sections
166 Remove from the output all section headers and all section data
167 not within segments. Note that many tools will not be able to
168 use an object without section headers.
169 -T Remove Swift symbols.
171
173 llvm-strip exits with a non-zero exit code if there is an error. Oth‐
174 erwise, it exits with code 0.
175
177 To report bugs, please visit <https://bugs.llvm.org/>.
178
180 llvm-objcopy(1)
181
183 Maintained by the LLVM Team (https://llvm.org/).
184
186 2003-2021, LLVM Project
18712 2021-05-17 LLVM-STRIP(1)