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128 .\" ======================================================================== |
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129 .\" |
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130 .IX Title "STRIP 1" |
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131 .TH STRIP 1 "2008-01-09" "binutils-2.18.50" "GNU Development Tools" |
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132 .SH "NAME" |
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133 strip \- Discard symbols from object files. |
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134 .SH "SYNOPSIS" |
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135 .IX Header "SYNOPSIS" |
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136 strip [\fB\-F\fR \fIbfdname\fR |\fB\-\-target=\fR\fIbfdname\fR] |
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137 [\fB\-I\fR \fIbfdname\fR |\fB\-\-input\-target=\fR\fIbfdname\fR] |
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138 [\fB\-O\fR \fIbfdname\fR |\fB\-\-output\-target=\fR\fIbfdname\fR] |
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139 [\fB\-s\fR|\fB\-\-strip\-all\fR] |
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140 [\fB\-S\fR|\fB\-g\fR|\fB\-d\fR|\fB\-\-strip\-debug\fR] |
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141 [\fB\-K\fR \fIsymbolname\fR |\fB\-\-keep\-symbol=\fR\fIsymbolname\fR] |
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142 [\fB\-N\fR \fIsymbolname\fR |\fB\-\-strip\-symbol=\fR\fIsymbolname\fR] |
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143 [\fB\-w\fR|\fB\-\-wildcard\fR] |
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144 [\fB\-x\fR|\fB\-\-discard\-all\fR] [\fB\-X\fR |\fB\-\-discard\-locals\fR] |
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145 [\fB\-R\fR \fIsectionname\fR |\fB\-\-remove\-section=\fR\fIsectionname\fR] |
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146 [\fB\-o\fR \fIfile\fR] [\fB\-p\fR|\fB\-\-preserve\-dates\fR] |
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147 [\fB\-\-keep\-file\-symbols\fR] |
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148 [\fB\-\-only\-keep\-debug\fR] |
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149 [\fB\-v\fR |\fB\-\-verbose\fR] [\fB\-V\fR|\fB\-\-version\fR] |
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150 [\fB\-\-help\fR] [\fB\-\-info\fR] |
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151 \fIobjfile\fR... |
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152 .SH "DESCRIPTION" |
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153 .IX Header "DESCRIPTION" |
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154 \&\s-1GNU\s0 \fBstrip\fR discards all symbols from object files |
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155 \&\fIobjfile\fR. The list of object files may include archives. |
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156 At least one object file must be given. |
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157 .PP |
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158 \&\fBstrip\fR modifies the files named in its argument, |
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159 rather than writing modified copies under different names. |
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160 .SH "OPTIONS" |
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161 .IX Header "OPTIONS" |
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162 .IP "\fB\-F\fR \fIbfdname\fR" 4 |
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163 .IX Item "-F bfdname" |
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164 .PD 0 |
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165 .IP "\fB\-\-target=\fR\fIbfdname\fR" 4 |
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166 .IX Item "--target=bfdname" |
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167 .PD |
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168 Treat the original \fIobjfile\fR as a file with the object |
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169 code format \fIbfdname\fR, and rewrite it in the same format. |
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170 .IP "\fB\-\-help\fR" 4 |
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171 .IX Item "--help" |
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172 Show a summary of the options to \fBstrip\fR and exit. |
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173 .IP "\fB\-\-info\fR" 4 |
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174 .IX Item "--info" |
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175 Display a list showing all architectures and object formats available. |
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176 .IP "\fB\-I\fR \fIbfdname\fR" 4 |
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177 .IX Item "-I bfdname" |
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178 .PD 0 |
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179 .IP "\fB\-\-input\-target=\fR\fIbfdname\fR" 4 |
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180 .IX Item "--input-target=bfdname" |
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181 .PD |
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182 Treat the original \fIobjfile\fR as a file with the object |
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183 code format \fIbfdname\fR. |
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184 .IP "\fB\-O\fR \fIbfdname\fR" 4 |
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185 .IX Item "-O bfdname" |
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186 .PD 0 |
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187 .IP "\fB\-\-output\-target=\fR\fIbfdname\fR" 4 |
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188 .IX Item "--output-target=bfdname" |
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189 .PD |
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190 Replace \fIobjfile\fR with a file in the output format \fIbfdname\fR. |
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191 .IP "\fB\-R\fR \fIsectionname\fR" 4 |
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192 .IX Item "-R sectionname" |
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193 .PD 0 |
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194 .IP "\fB\-\-remove\-section=\fR\fIsectionname\fR" 4 |
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195 .IX Item "--remove-section=sectionname" |
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196 .PD |
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197 Remove any section named \fIsectionname\fR from the output file. This |
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198 option may be given more than once. Note that using this option |
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199 inappropriately may make the output file unusable. |
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200 .IP "\fB\-s\fR" 4 |
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201 .IX Item "-s" |
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202 .PD 0 |
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203 .IP "\fB\-\-strip\-all\fR" 4 |
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204 .IX Item "--strip-all" |
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205 .PD |
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206 Remove all symbols. |
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207 .IP "\fB\-g\fR" 4 |
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208 .IX Item "-g" |
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209 .PD 0 |
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210 .IP "\fB\-S\fR" 4 |
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211 .IX Item "-S" |
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212 .IP "\fB\-d\fR" 4 |
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213 .IX Item "-d" |
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214 .IP "\fB\-\-strip\-debug\fR" 4 |
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215 .IX Item "--strip-debug" |
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216 .PD |
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217 Remove debugging symbols only. |
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218 .IP "\fB\-\-strip\-unneeded\fR" 4 |
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219 .IX Item "--strip-unneeded" |
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220 Remove all symbols that are not needed for relocation processing. |
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221 .IP "\fB\-K\fR \fIsymbolname\fR" 4 |
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222 .IX Item "-K symbolname" |
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223 .PD 0 |
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224 .IP "\fB\-\-keep\-symbol=\fR\fIsymbolname\fR" 4 |
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225 .IX Item "--keep-symbol=symbolname" |
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226 .PD |
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227 When stripping symbols, keep symbol \fIsymbolname\fR even if it would |
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228 normally be stripped. This option may be given more than once. |
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229 .IP "\fB\-N\fR \fIsymbolname\fR" 4 |
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230 .IX Item "-N symbolname" |
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231 .PD 0 |
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232 .IP "\fB\-\-strip\-symbol=\fR\fIsymbolname\fR" 4 |
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233 .IX Item "--strip-symbol=symbolname" |
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234 .PD |
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235 Remove symbol \fIsymbolname\fR from the source file. This option may be |
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236 given more than once, and may be combined with strip options other than |
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237 \&\fB\-K\fR. |
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238 .IP "\fB\-o\fR \fIfile\fR" 4 |
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239 .IX Item "-o file" |
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240 Put the stripped output in \fIfile\fR, rather than replacing the |
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241 existing file. When this argument is used, only one \fIobjfile\fR |
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242 argument may be specified. |
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243 .IP "\fB\-p\fR" 4 |
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244 .IX Item "-p" |
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245 .PD 0 |
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246 .IP "\fB\-\-preserve\-dates\fR" 4 |
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247 .IX Item "--preserve-dates" |
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248 .PD |
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249 Preserve the access and modification dates of the file. |
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250 .IP "\fB\-w\fR" 4 |
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251 .IX Item "-w" |
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252 .PD 0 |
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253 .IP "\fB\-\-wildcard\fR" 4 |
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254 .IX Item "--wildcard" |
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255 .PD |
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256 Permit regular expressions in \fIsymbolname\fRs used in other command |
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257 line options. The question mark (?), asterisk (*), backslash (\e) and |
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258 square brackets ([]) operators can be used anywhere in the symbol |
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259 name. If the first character of the symbol name is the exclamation |
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260 point (!) then the sense of the switch is reversed for that symbol. |
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261 For example: |
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262 .Sp |
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263 .Vb 1 |
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264 \& -w -K !foo -K fo* |
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265 .Ve |
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266 .Sp |
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267 would cause strip to only keep symbols that start with the letters |
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268 \&\*(L"fo\*(R", but to discard the symbol \*(L"foo\*(R". |
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269 .IP "\fB\-x\fR" 4 |
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270 .IX Item "-x" |
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271 .PD 0 |
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272 .IP "\fB\-\-discard\-all\fR" 4 |
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273 .IX Item "--discard-all" |
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274 .PD |
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275 Remove non-global symbols. |
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276 .IP "\fB\-X\fR" 4 |
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277 .IX Item "-X" |
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278 .PD 0 |
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279 .IP "\fB\-\-discard\-locals\fR" 4 |
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280 .IX Item "--discard-locals" |
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281 .PD |
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282 Remove compiler-generated local symbols. |
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283 (These usually start with \fBL\fR or \fB.\fR.) |
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284 .IP "\fB\-\-keep\-file\-symbols\fR" 4 |
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285 .IX Item "--keep-file-symbols" |
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286 When stripping a file, perhaps with \fB\-\-strip\-debug\fR or |
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287 \&\fB\-\-strip\-unneeded\fR, retain any symbols specifying source file names, |
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288 which would otherwise get stripped. |
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289 .IP "\fB\-\-only\-keep\-debug\fR" 4 |
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290 .IX Item "--only-keep-debug" |
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291 Strip a file, removing contents of any sections that would not be |
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292 stripped by \fB\-\-strip\-debug\fR and leaving the debugging sections |
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293 intact. In \s-1ELF\s0 files, this preserves all note sections in the output. |
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294 .Sp |
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295 The intention is that this option will be used in conjunction with |
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296 \&\fB\-\-add\-gnu\-debuglink\fR to create a two part executable. One a |
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297 stripped binary which will occupy less space in \s-1RAM\s0 and in a |
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298 distribution and the second a debugging information file which is only |
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299 needed if debugging abilities are required. The suggested procedure |
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300 to create these files is as follows: |
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301 .RS 4 |
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302 .IP "1.<Link the executable as normal. Assuming that is is called>" 4 |
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303 .IX Item "1.<Link the executable as normal. Assuming that is is called>" |
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304 \&\f(CW\*(C`foo\*(C'\fR then... |
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305 .ie n .IP "1.<Run ""objcopy \-\-only\-keep\-debug foo foo.dbg"" to>" 4 |
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306 .el .IP "1.<Run \f(CWobjcopy \-\-only\-keep\-debug foo foo.dbg\fR to>" 4 |
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307 .IX Item "1.<Run objcopy --only-keep-debug foo foo.dbg to>" |
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308 create a file containing the debugging info. |
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309 .ie n .IP "1.<Run ""objcopy \-\-strip\-debug foo"" to create a>" 4 |
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310 .el .IP "1.<Run \f(CWobjcopy \-\-strip\-debug foo\fR to create a>" 4 |
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311 .IX Item "1.<Run objcopy --strip-debug foo to create a>" |
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312 stripped executable. |
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313 .ie n .IP "1.<Run ""objcopy \-\-add\-gnu\-debuglink=foo.dbg foo"">" 4 |
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314 .el .IP "1.<Run \f(CWobjcopy \-\-add\-gnu\-debuglink=foo.dbg foo\fR>" 4 |
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315 .IX Item "1.<Run objcopy --add-gnu-debuglink=foo.dbg foo>" |
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316 to add a link to the debugging info into the stripped executable. |
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317 .RE |
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318 .RS 4 |
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319 .Sp |
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320 Note\-\-\-the choice of \f(CW\*(C`.dbg\*(C'\fR as an extension for the debug info |
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321 file is arbitrary. Also the \f(CW\*(C`\-\-only\-keep\-debug\*(C'\fR step is |
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322 optional. You could instead do this: |
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323 .IP "1.<Link the executable as normal.>" 4 |
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324 .IX Item "1.<Link the executable as normal.>" |
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325 .PD 0 |
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326 .ie n .IP "1.<Copy ""foo""\fR to \f(CW""foo.full"">" 4 |
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327 .el .IP "1.<Copy \f(CWfoo\fR to \f(CWfoo.full\fR>" 4 |
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328 .IX Item "1.<Copy foo to foo.full>" |
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329 .ie n .IP "1.<Run ""strip \-\-strip\-debug foo"">" 4 |
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330 .el .IP "1.<Run \f(CWstrip \-\-strip\-debug foo\fR>" 4 |
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331 .IX Item "1.<Run strip --strip-debug foo>" |
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332 .ie n .IP "1.<Run ""objcopy \-\-add\-gnu\-debuglink=foo.full foo"">" 4 |
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333 .el .IP "1.<Run \f(CWobjcopy \-\-add\-gnu\-debuglink=foo.full foo\fR>" 4 |
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334 .IX Item "1.<Run objcopy --add-gnu-debuglink=foo.full foo>" |
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335 .RE |
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336 .RS 4 |
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337 .PD |
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338 .Sp |
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339 i.e., the file pointed to by the \fB\-\-add\-gnu\-debuglink\fR can be the |
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340 full executable. It does not have to be a file created by the |
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341 \&\fB\-\-only\-keep\-debug\fR switch. |
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342 .Sp |
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343 Note\-\-\-this switch is only intended for use on fully linked files. It |
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344 does not make sense to use it on object files where the debugging |
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345 information may be incomplete. Besides the gnu_debuglink feature |
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346 currently only supports the presence of one filename containing |
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347 debugging information, not multiple filenames on a one-per-object-file |
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348 basis. |
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349 .RE |
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350 .IP "\fB\-V\fR" 4 |
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351 .IX Item "-V" |
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352 .PD 0 |
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353 .IP "\fB\-\-version\fR" 4 |
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354 .IX Item "--version" |
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355 .PD |
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356 Show the version number for \fBstrip\fR. |
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357 .IP "\fB\-v\fR" 4 |
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358 .IX Item "-v" |
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359 .PD 0 |
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360 .IP "\fB\-\-verbose\fR" 4 |
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361 .IX Item "--verbose" |
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362 .PD |
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363 Verbose output: list all object files modified. In the case of |
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364 archives, \fBstrip \-v\fR lists all members of the archive. |
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365 .IP "\fB@\fR\fIfile\fR" 4 |
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366 .IX Item "@file" |
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367 Read command-line options from \fIfile\fR. The options read are |
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368 inserted in place of the original @\fIfile\fR option. If \fIfile\fR |
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369 does not exist, or cannot be read, then the option will be treated |
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370 literally, and not removed. |
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371 .Sp |
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372 Options in \fIfile\fR are separated by whitespace. A whitespace |
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373 character may be included in an option by surrounding the entire |
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374 option in either single or double quotes. Any character (including a |
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375 backslash) may be included by prefixing the character to be included |
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376 with a backslash. The \fIfile\fR may itself contain additional |
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377 @\fIfile\fR options; any such options will be processed recursively. |
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378 .SH "SEE ALSO" |
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379 .IX Header "SEE ALSO" |
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380 the Info entries for \fIbinutils\fR. |
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381 .SH "COPYRIGHT" |
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382 .IX Header "COPYRIGHT" |
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383 Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
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384 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
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385 .PP |
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386 Permission is granted to copy, distribute and/or modify this document |
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387 under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.2 |
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388 or any later version published by the Free Software Foundation; |
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389 with no Invariant Sections, with no Front-Cover Texts, and with no |
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390 Back-Cover Texts. A copy of the license is included in the |
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391 section entitled \*(L"\s-1GNU\s0 Free Documentation License\*(R". |