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132 .\" ========================================================================
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133 .\"
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134 .IX Title "GIJ 1"
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135 .TH GIJ 1 "2009-04-21" "gcc-4.4.0" "GNU"
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136 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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137 .\" way too many mistakes in technical documents.
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138 .if n .ad l
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139 .nh
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140 .SH "NAME"
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141 gij \- GNU interpreter for Java bytecode
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142 .SH "SYNOPSIS"
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143 .IX Header "SYNOPSIS"
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144 gij [\fB\s-1OPTION\s0\fR] ... \fI\s-1JARFILE\s0\fR [\fI\s-1ARGS\s0\fR...]
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145 .PP
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146 gij [\fB\-jar\fR] [\fB\s-1OPTION\s0\fR] ... \fI\s-1CLASS\s0\fR [\fI\s-1ARGS\s0\fR...]
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147 [\fB\-cp\fR \fIpath\fR] [\fB\-classpath\fR \fIpath\fR]
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148 [\fB\-D\fR\fIname\fR[=\fIvalue\fR]...]
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149 [\fB\-ms=\fR\fInumber\fR] [\fB\-mx=\fR\fInumber\fR]
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150 [\fB\-X\fR\fIargument\fR] [\fB\-verbose\fR] [\fB\-verbose:class\fR]
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151 [\fB\-\-showversion\fR] [\fB\-\-version\fR] [\fB\-\-help\fR][\fB\-?\fR]
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152 .SH "DESCRIPTION"
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153 .IX Header "DESCRIPTION"
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154 \&\f(CW\*(C`gij\*(C'\fR is a Java bytecode interpreter included with \f(CW\*(C`libgcj\*(C'\fR.
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155 \&\f(CW\*(C`gij\*(C'\fR is not available on every platform; porting it requires a
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156 small amount of assembly programming which has not been done for all the
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157 targets supported by \fBgcj\fR.
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158 .PP
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159 The primary argument to \f(CW\*(C`gij\*(C'\fR is the name of a class or, with
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160 \&\f(CW\*(C`\-jar\*(C'\fR, a jar file. Options before this argument are interpreted
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161 by \f(CW\*(C`gij\*(C'\fR; remaining options are passed to the interpreted program.
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162 .PP
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163 If a class name is specified and this class does not have a \f(CW\*(C`main\*(C'\fR
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164 method with the appropriate signature (a \f(CW\*(C`static void\*(C'\fR method with
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165 a \f(CW\*(C`String[]\*(C'\fR as its sole argument), then \f(CW\*(C`gij\*(C'\fR will print an
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166 error and exit.
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167 .PP
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168 If a jar file is specified then \f(CW\*(C`gij\*(C'\fR will use information in it to
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169 determine which class' \f(CW\*(C`main\*(C'\fR method will be invoked.
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170 .PP
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171 \&\f(CW\*(C`gij\*(C'\fR will invoke the \f(CW\*(C`main\*(C'\fR method with all the remaining
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172 command-line options.
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173 .PP
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174 Note that \f(CW\*(C`gij\*(C'\fR is not limited to interpreting code. Because
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175 \&\f(CW\*(C`libgcj\*(C'\fR includes a class loader which can dynamically load shared
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176 objects, it is possible to give \f(CW\*(C`gij\*(C'\fR the name of a class which has
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177 been compiled and put into a shared library on the class path.
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178 .SH "OPTIONS"
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179 .IX Header "OPTIONS"
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180 .IP "\fB\-cp\fR \fIpath\fR" 4
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181 .IX Item "-cp path"
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182 .PD 0
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183 .IP "\fB\-classpath\fR \fIpath\fR" 4
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184 .IX Item "-classpath path"
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185 .PD
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186 Set the initial class path. The class path is used for finding
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187 class and resource files. If specified, this option overrides the
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188 \&\f(CW\*(C`CLASSPATH\*(C'\fR environment variable. Note that this option is
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189 ignored if \f(CW\*(C`\-jar\*(C'\fR is used.
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190 .IP "\fB\-D\fR\fIname\fR\fB[=\fR\fIvalue\fR\fB]\fR" 4
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191 .IX Item "-Dname[=value]"
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192 This defines a system property named \fIname\fR with value \fIvalue\fR.
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193 If \fIvalue\fR is not specified then it defaults to the empty string.
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194 These system properties are initialized at the program's startup and can
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195 be retrieved at runtime using the \f(CW\*(C`java.lang.System.getProperty\*(C'\fR
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196 method.
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197 .IP "\fB\-ms=\fR\fInumber\fR" 4
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198 .IX Item "-ms=number"
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199 Equivalent to \f(CW\*(C`\-Xms\*(C'\fR.
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200 .IP "\fB\-mx=\fR\fInumber\fR" 4
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201 .IX Item "-mx=number"
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202 Equivalent to \f(CW\*(C`\-Xmx\*(C'\fR.
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203 .IP "\fB\-noverify\fR" 4
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204 .IX Item "-noverify"
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205 Do not verify compliance of bytecode with the \s-1VM\s0 specification. In addition,
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206 this option disables type verification which is otherwise performed on BC-ABI
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207 compiled code.
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208 .IP "\fB\-X\fR" 4
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209 .IX Item "-X"
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210 .PD 0
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211 .IP "\fB\-X\fR\fIargument\fR" 4
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212 .IX Item "-Xargument"
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213 .PD
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214 Supplying \f(CW\*(C`\-X\*(C'\fR by itself will cause \f(CW\*(C`gij\*(C'\fR to list all the
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215 supported \f(CW\*(C`\-X\*(C'\fR options. Currently these options are supported:
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216 .RS 4
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217 .IP "\fB\-Xms\fR\fIsize\fR" 4
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218 .IX Item "-Xmssize"
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219 Set the initial heap size.
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220 .IP "\fB\-Xmx\fR\fIsize\fR" 4
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221 .IX Item "-Xmxsize"
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222 Set the maximum heap size.
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223 .IP "\fB\-Xss\fR\fIsize\fR" 4
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224 .IX Item "-Xsssize"
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225 Set the thread stack size.
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226 .RE
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227 .RS 4
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228 .Sp
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229 Unrecognized \f(CW\*(C`\-X\*(C'\fR options are ignored, for compatibility with
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230 other runtimes.
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231 .RE
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232 .IP "\fB\-jar\fR" 4
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233 .IX Item "-jar"
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234 This indicates that the name passed to \f(CW\*(C`gij\*(C'\fR should be interpreted
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235 as the name of a jar file, not a class.
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236 .IP "\fB\-\-help\fR" 4
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237 .IX Item "--help"
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238 .PD 0
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239 .IP "\fB\-?\fR" 4
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240 .IX Item "-?"
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241 .PD
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242 Print help, then exit.
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243 .IP "\fB\-\-showversion\fR" 4
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244 .IX Item "--showversion"
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245 Print version number and continue.
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246 .IP "\fB\-\-fullversion\fR" 4
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247 .IX Item "--fullversion"
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248 Print detailed version information, then exit.
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249 .IP "\fB\-\-version\fR" 4
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250 .IX Item "--version"
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251 Print version number, then exit.
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252 .IP "\fB\-verbose\fR" 4
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253 .IX Item "-verbose"
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254 .PD 0
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255 .IP "\fB\-verbose:class\fR" 4
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256 .IX Item "-verbose:class"
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257 .PD
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258 Each time a class is initialized, print a short message on standard error.
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259 .PP
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260 \&\f(CW\*(C`gij\*(C'\fR also recognizes and ignores the following options, for
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261 compatibility with existing application launch scripts:
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262 \&\f(CW\*(C`\-client\*(C'\fR, \f(CW\*(C`\-server\*(C'\fR, \f(CW\*(C`\-hotspot\*(C'\fR, \f(CW\*(C`\-jrockit\*(C'\fR,
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263 \&\f(CW\*(C`\-agentlib\*(C'\fR, \f(CW\*(C`\-agentpath\*(C'\fR, \f(CW\*(C`\-debug\*(C'\fR, \f(CW\*(C`\-d32\*(C'\fR,
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264 \&\f(CW\*(C`\-d64\*(C'\fR, \f(CW\*(C`\-javaagent\*(C'\fR, \f(CW\*(C`\-noclassgc\*(C'\fR, \f(CW\*(C`\-verify\*(C'\fR,
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265 and \f(CW\*(C`\-verifyremote\*(C'\fR.
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266 .SH "SEE ALSO"
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267 .IX Header "SEE ALSO"
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268 \&\fIgcc\fR\|(1), \fIgcj\fR\|(1), \fIgcjh\fR\|(1), \fIjcf\-dump\fR\|(1), \fIgfdl\fR\|(7),
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269 and the Info entries for \fIgcj\fR and \fIgcc\fR.
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270 .SH "COPYRIGHT"
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271 .IX Header "COPYRIGHT"
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272 Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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273 .PP
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274 Permission is granted to copy, distribute and/or modify this document
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275 under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.2 or
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276 any later version published by the Free Software Foundation; with no
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277 Invariant Sections, the Front-Cover Texts being (a) (see below), and
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278 with the Back-Cover Texts being (b) (see below).
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279 A copy of the license is included in the
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280 man page \fIgfdl\fR\|(7).
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281 .PP
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282 (a) The \s-1FSF\s0's Front-Cover Text is:
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283 .PP
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284 .Vb 1
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285 \& A GNU Manual
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286 .Ve
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287 .PP
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288 (b) The \s-1FSF\s0's Back-Cover Text is:
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289 .PP
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290 .Vb 3
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291 \& You have freedom to copy and modify this GNU Manual, like GNU
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292 \& software. Copies published by the Free Software Foundation raise
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293 \& funds for GNU development.
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294 .Ve
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