| 1 |
<?xml version='1.0' encoding="UTF-8"?> |
| 2 |
<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/gcc-upgrading.xml,v 1.5 2006/01/30 15:32:52 jkt Exp $ --> |
| 3 |
|
| 4 |
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd"> |
| 5 |
|
| 6 |
<guide link="/doc/en/gcc-upgrading.xml"> |
| 7 |
<title>Gentoo Linux GCC Upgrade Guide</title> |
| 8 |
|
| 9 |
<author title="Author"> |
| 10 |
<mail link="amne@gentoo.org">Wernfried Haas</mail> |
| 11 |
</author> |
| 12 |
<author title="Author"> |
| 13 |
<mail link="jkt@gentoo.org">Jan Kundrát</mail> |
| 14 |
</author> |
| 15 |
<author title="Editor"> |
| 16 |
<mail link="halcy0n@gentoo.org">Mark Loeser</mail> |
| 17 |
</author> |
| 18 |
|
| 19 |
<abstract> |
| 20 |
This document will guide the user through the process of upgrading GCC on their |
| 21 |
Gentoo Linux machines. |
| 22 |
</abstract> |
| 23 |
|
| 24 |
<!-- The content of this document is licensed under the CC-BY-SA license --> |
| 25 |
<!-- See http://creativecommons.org/licenses/by-sa/2.5 --> |
| 26 |
<license/> |
| 27 |
|
| 28 |
<version>5</version> |
| 29 |
<date>2006-02-02</date> |
| 30 |
|
| 31 |
<chapter id="intro"> |
| 32 |
<title>Introduction</title> |
| 33 |
<section> |
| 34 |
<title>GCC Upgrading</title> |
| 35 |
<body> |
| 36 |
|
| 37 |
<p> |
| 38 |
Why should you upgrade? Well, GCC is quite similar to any other package on your |
| 39 |
system, just a bit more critical. You should upgrade GCC whenever a new version |
| 40 |
fixes some bug that annoys you, new functionality you need is introduced, or if |
| 41 |
you want to keep your system up-to-date. If none of the previous cases apply to |
| 42 |
you, you can safely postpone upgrade as long as your GCC version is supported by |
| 43 |
Gentoo developers. |
| 44 |
</p> |
| 45 |
|
| 46 |
<p> |
| 47 |
If you install a newer version of GCC, the system will not switch over to use it |
| 48 |
automatically. You'll have to explicitly request the change because the |
| 49 |
migration process might require some additional steps. If you decide not to |
| 50 |
switch, Portage will continue to use older version of your compiler until you |
| 51 |
change your mind, or remove the old compiler from the system. |
| 52 |
</p> |
| 53 |
|
| 54 |
<p> |
| 55 |
This guide will document the necessary steps required to perform a seamless |
| 56 |
upgrade of the compiler used by your Gentoo box. A specific section is |
| 57 |
dedicated to the <uri link="#upgrade-3.3-to-3.4">upgrade from GCC 3.3 to 3.4 or |
| 58 |
greater versions</uri> and issues with <c>libstdc++</c>. A second specific |
| 59 |
section is for users <uri link="#first-install">first installing</uri> Gentoo |
| 60 |
using a stage3 tarball, after a new GCC major/minor version has been released. |
| 61 |
</p> |
| 62 |
|
| 63 |
<note> |
| 64 |
It should be noted that upgrading from GCC-3.4 to GCC-4.0 or greater requires |
| 65 |
no real changes to be made by the user, as GCC-3.4 and GCC-4.0 use the same |
| 66 |
ABI. All that is required is that <c>gcc-config</c> is used to select the |
| 67 |
compiler desired. |
| 68 |
</note> |
| 69 |
|
| 70 |
</body> |
| 71 |
</section> |
| 72 |
</chapter> |
| 73 |
|
| 74 |
<chapter id="upgrade-general"> |
| 75 |
<title>General Upgrade Instructions</title> |
| 76 |
<section> |
| 77 |
<title>Introduction</title> |
| 78 |
<body> |
| 79 |
|
| 80 |
<impo> |
| 81 |
If you're looking for instructions specific to upgrades from GCC-3.3 to GCC-3.4 |
| 82 |
or greater, please consult the <uri link="#upgrade-3.3-to-3.4">dedicated |
| 83 |
section</uri>. |
| 84 |
</impo> |
| 85 |
|
| 86 |
<impo> |
| 87 |
If you're looking for instructions specific to upgrades in GCC for new |
| 88 |
installs, please consult the <uri link="#first-install">dedicated |
| 89 |
section</uri>. |
| 90 |
</impo> |
| 91 |
|
| 92 |
<p> |
| 93 |
Generally speaking, upgrades to <e>bug fix releases</e>, like from 3.3.5 to |
| 94 |
3.3.6, should be quite safe -- just emerge new version, switch your system to |
| 95 |
use it and rebuild the only affected package, <c>libtool</c>. However, some GCC |
| 96 |
upgrades break binary compatibility; in such cases a rebuild of the affected |
| 97 |
packages (or even whole toolchain and system) might be required. |
| 98 |
</p> |
| 99 |
|
| 100 |
<p> |
| 101 |
When we spoke about the need to switch your compiler to the newer version by |
| 102 |
hand, we said it won't happen automatically. However, there is one exception -- |
| 103 |
upgrades to bug fix releases, like from 3.3.5 to 3.3.6 in case you don't use the |
| 104 |
"multislot" feature allowing them to coexist on one system. Multislot is |
| 105 |
disabled by default as the majority of users won't benefit from it. |
| 106 |
</p> |
| 107 |
|
| 108 |
<pre caption="Upgrading GCC"> |
| 109 |
# <i>emerge -uav gcc</i> |
| 110 |
|
| 111 |
<comment>(Please substitute "i686-pc-linux-gnu-3.4.4" with the GCC |
| 112 |
version and CHOST settings you've upgraded to:)</comment> |
| 113 |
# <i>gcc-config i686-pc-linux-gnu-3.4.4</i> |
| 114 |
# <i>source /etc/profile</i> |
| 115 |
|
| 116 |
<comment>(Rebuilding libtool)</comment> |
| 117 |
# <i>emerge --oneshot -av libtool</i> |
| 118 |
</pre> |
| 119 |
|
| 120 |
<p> |
| 121 |
Now let's rebuild toolchain and then world so we will make use of the new |
| 122 |
compiler. |
| 123 |
</p> |
| 124 |
|
| 125 |
<pre caption="Rebuilding system"> |
| 126 |
# <i>emerge -eav system</i> |
| 127 |
# <i>emerge -eav world</i> |
| 128 |
</pre> |
| 129 |
|
| 130 |
<p> |
| 131 |
It is safe to remove the older GCC version at this time. If you feel the need, |
| 132 |
please issue the following command (as usual, substitute |
| 133 |
<c>=sys-devel/gcc-3.3*</c> with the version you want to uninstall): |
| 134 |
</p> |
| 135 |
|
| 136 |
<pre caption="Removing older GCC version"> |
| 137 |
# <i>emerge -aC =sys-devel/gcc-3.3*</i> |
| 138 |
</pre> |
| 139 |
|
| 140 |
</body> |
| 141 |
</section> |
| 142 |
</chapter> |
| 143 |
|
| 144 |
<chapter id="upgrade-3.3-to-3.4"> |
| 145 |
<title>Upgrading from GCC-3.3 to 3.4 or greater</title> |
| 146 |
<section> |
| 147 |
<title>Introduction</title> |
| 148 |
<body> |
| 149 |
|
| 150 |
<p> |
| 151 |
The upgrade from GCC-3.3 to 3.4 or greater is not seamless as the C++ ABI |
| 152 |
changed between these two versions. There is an issue with the <c>libstdc++</c> |
| 153 |
library which must be taken care of, as well. |
| 154 |
</p> |
| 155 |
|
| 156 |
</body> |
| 157 |
</section> |
| 158 |
<section id="upgrade-3.3-to-3.4-choices"> |
| 159 |
<title>The Choices</title> |
| 160 |
<body> |
| 161 |
|
| 162 |
<impo> |
| 163 |
If you're upgrading on a SPARC machine, you will have to take the way of |
| 164 |
<uri link="#upgrade-3.3-to-3.4-emerge-e">complete system rebuild</uri> due to |
| 165 |
some internal <uri link="http://gcc.gnu.org/gcc-3.4/sparc-abi.html">ABI |
| 166 |
changes</uri> in GCC's parameter passing. |
| 167 |
</impo> |
| 168 |
|
| 169 |
<p> |
| 170 |
You have two possibilities on how to upgrade your system. The <uri |
| 171 |
link="#upgrade-3.3-to-3.4-revdep-rebuild">first method</uri> is faster and |
| 172 |
requires use of the <c>revdep-rebuild</c> tool from package <c>gentoolkit</c> |
| 173 |
while the <uri link="#upgrade-3.3-to-3.4-emerge-e">second one</uri> rebuilds the |
| 174 |
entire system from scratch so it will make use of new GCC features. It's up to |
| 175 |
you to decide which of these two ways you will choose. In most cases, the first |
| 176 |
method is sufficient. |
| 177 |
</p> |
| 178 |
|
| 179 |
</body> |
| 180 |
</section> |
| 181 |
<section id="upgrade-3.3-to-3.4-revdep-rebuild"> |
| 182 |
<title>Using revdep-rebuild</title> |
| 183 |
<body> |
| 184 |
|
| 185 |
<p> |
| 186 |
This method requires that you first install <c>gentoolkit</c> if you have not |
| 187 |
already done so. Then we will upgrade GCC and switch to the new compiler. We |
| 188 |
will also rebuild the <c>libtool</c> package to ensure that toolchain is in |
| 189 |
healthy state. |
| 190 |
</p> |
| 191 |
|
| 192 |
<pre caption="Installing gentoolkit and upgrading GCC"> |
| 193 |
# <i>emerge -an gentoolkit</i> |
| 194 |
# <i>emerge -uav gcc</i> |
| 195 |
# <i>gcc-config i686-pc-linux-gnu-3.4.4</i> |
| 196 |
# <i>source /etc/profile</i> |
| 197 |
|
| 198 |
<comment>(Rebuilding libtool)</comment> |
| 199 |
# <i>emerge --oneshot -av libtool</i> |
| 200 |
</pre> |
| 201 |
|
| 202 |
<note> |
| 203 |
This assumes that you have <c>CHOST="i686-pc-linux-gnu"</c> set. If you are |
| 204 |
using another CHOST, please use the appropriate gcc-config line. |
| 205 |
</note> |
| 206 |
|
| 207 |
<p> |
| 208 |
Now, we want to see which packages that revdep-rebuild will want to rebuild. |
| 209 |
Then we will tell revdep-rebuild to actually rebuild the packages. This may take |
| 210 |
some time, so have some patience. |
| 211 |
</p> |
| 212 |
|
| 213 |
<pre caption="Using revdep-rebuild"> |
| 214 |
# <i>revdep-rebuild --library libstdc++.so.5 -- -p -v</i> |
| 215 |
# <i>revdep-rebuild --library libstdc++.so.5</i> |
| 216 |
</pre> |
| 217 |
|
| 218 |
<note> |
| 219 |
It is possible that you might have problems with non-existing package versions |
| 220 |
due to them being outdated or masked. If this is the case, you will want to use |
| 221 |
the <c>--package-names</c> option to <c>revdep-rebuild</c>. This causes packages |
| 222 |
to be recompiled based on the package name, rather than the exact name and |
| 223 |
version. |
| 224 |
</note> |
| 225 |
|
| 226 |
<p> |
| 227 |
To provide compatibility with older binary C++ applications and any packages |
| 228 |
that revdep-rebuild might have missed, <c>sys-libs/libstdc++-v3</c> needs to be |
| 229 |
merged before you unmerge GCC 3.3 from your system. |
| 230 |
</p> |
| 231 |
|
| 232 |
<pre caption="Installing libstdc++-v3 and cleaning up"> |
| 233 |
# <i>emerge --oneshot sys-libs/libstdc++-v3</i> |
| 234 |
# <i>emerge -aC =sys-devel/gcc-3.3*</i> |
| 235 |
</pre> |
| 236 |
|
| 237 |
</body> |
| 238 |
</section> |
| 239 |
<section id="upgrade-3.3-to-3.4-emerge-e"> |
| 240 |
<title>Using emerge -e</title> |
| 241 |
<body> |
| 242 |
|
| 243 |
<p> |
| 244 |
This method, while much slower, will rebuild your whole system to ensure that |
| 245 |
everything has been rebuilt with your new compiler, and therefore safer. At |
| 246 |
first, you will upgrade GCC and libtool and switch to your new compiler. |
| 247 |
</p> |
| 248 |
|
| 249 |
<pre caption="Upgrading GCC"> |
| 250 |
# <i>emerge -uav gcc</i> |
| 251 |
# <i>gcc-config i686-pc-linux-gnu-3.4.4</i> |
| 252 |
# <i>source /etc/profile</i> |
| 253 |
|
| 254 |
<comment>(Rebuilding libtool)</comment> |
| 255 |
# <i>emerge --oneshot -av libtool</i> |
| 256 |
</pre> |
| 257 |
|
| 258 |
<note> |
| 259 |
This assumes that you have <c>CHOST="i686-pc-linux-gnu"</c> set. If you are |
| 260 |
using another CHOST, please use the appropriate gcc-config line. |
| 261 |
</note> |
| 262 |
|
| 263 |
<p> |
| 264 |
To provide compatibility with older binary C++ applications, |
| 265 |
<c>sys-libs/libstdc++-v3</c> needs to be merged onto your system. |
| 266 |
</p> |
| 267 |
|
| 268 |
<pre caption="Installing libstdc++-v3"> |
| 269 |
# <i>emerge --oneshot sys-libs/libstdc++-v3</i> |
| 270 |
</pre> |
| 271 |
|
| 272 |
<p> |
| 273 |
Now we will go about first rebuilding the system target, then the world target. |
| 274 |
This will take a very long time, depending on the number of packages that you |
| 275 |
have installed, as it will rebuild your entire toolchain and supporting system |
| 276 |
files, followed by every package on your system, including the toolchain. This |
| 277 |
is necessary to ensure that all packages have been compiled with the new |
| 278 |
toolchain, including the toolchain itself. |
| 279 |
</p> |
| 280 |
|
| 281 |
<pre caption="Rebuilding system and world"> |
| 282 |
# <i>emerge -e system</i> |
| 283 |
# <i>emerge -e world</i> |
| 284 |
</pre> |
| 285 |
|
| 286 |
<p> |
| 287 |
It is also safe to remove older GCC versions at this time: |
| 288 |
</p> |
| 289 |
|
| 290 |
<pre caption="Cleaning up"> |
| 291 |
# <i>emerge -aC =sys-devel/gcc-3.3*</i> |
| 292 |
</pre> |
| 293 |
|
| 294 |
</body> |
| 295 |
</section> |
| 296 |
</chapter> |
| 297 |
|
| 298 |
<chapter id="common-pitfalls"> |
| 299 |
<title>Common Pitfalls</title> |
| 300 |
<section> |
| 301 |
<body> |
| 302 |
|
| 303 |
<p> |
| 304 |
It's important to disable <c>distcc</c> during upgrade. Mixing compiler versions |
| 305 |
on your nodes <e>will</e> cause build issues. This is not required for ccache, |
| 306 |
as the cache objects will be invalidated anyway. |
| 307 |
</p> |
| 308 |
|
| 309 |
<p> |
| 310 |
Always use same GCC version for your kernel and additional kernel modules. Once |
| 311 |
you rebuild your world with new GCC, external modules (like |
| 312 |
<c>app-emulation/qemu-softmmu</c>) will fail to load. Please rebuild your kernel |
| 313 |
with new GCC to fix that. |
| 314 |
</p> |
| 315 |
|
| 316 |
</body> |
| 317 |
</section> |
| 318 |
<section> |
| 319 |
<title>Frequent Error Messages</title> |
| 320 |
<body> |
| 321 |
|
| 322 |
<p> |
| 323 |
If your system complains about something like <e>libtool: link: |
| 324 |
`/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.6/libstdc++.la' is not a valid libtool |
| 325 |
archive</e>, please run <c>/sbin/fix_libtool_files.sh 3.3.6</c> (substitute |
| 326 |
"3.3.6" with the version numbers from the error message). |
| 327 |
</p> |
| 328 |
|
| 329 |
<p> |
| 330 |
If you see the <e>error: /usr/bin/gcc-config: line 632: |
| 331 |
/etc/env.d/gcc/i686-pc-linux-gnu-3.3.5: No such file or directory</e>, then try |
| 332 |
deleting <path>/etc/env.d/gcc/config-i686-pc-linux-gnu</path> and running |
| 333 |
<c>gcc-config</c> again, followed by <c>source /etc/profile</c>. Only do this if |
| 334 |
you do not have any cross-compilers set up, though. |
| 335 |
</p> |
| 336 |
|
| 337 |
<p> |
| 338 |
If a package fails during <c>emerge -e system</c> or <c>emerge -e world</c>, |
| 339 |
you can resume operation with <c>emerge --resume</c>. If a package fails |
| 340 |
repeatedly, skip it with <c>emerge --resume --skipfirst</c>. Don't run any |
| 341 |
other instances of emerge in between or you will lose the resume information. |
| 342 |
</p> |
| 343 |
|
| 344 |
<p> |
| 345 |
If you get an error message <e>spec failure: unrecognized spec option</e> while |
| 346 |
upgrading your compiler, try to switch back to your default compiler, unset the |
| 347 |
<c>GCC_SPECS</c> variable and upgrade GCC again: |
| 348 |
</p> |
| 349 |
|
| 350 |
<pre caption="Restoring primary specs"> |
| 351 |
# <i>gcc-config 1</i> |
| 352 |
# <i>source /etc/profile</i> |
| 353 |
# <i>unset GCC_SPECS</i> |
| 354 |
# <i>emerge -uav gcc</i> |
| 355 |
</pre> |
| 356 |
|
| 357 |
</body> |
| 358 |
</section> |
| 359 |
</chapter> |
| 360 |
|
| 361 |
<chapter id="first-install"> |
| 362 |
<title>Upgrading to GCC on a First Install</title> |
| 363 |
<section> |
| 364 |
<title>Introduction</title> |
| 365 |
<body> |
| 366 |
|
| 367 |
<p> |
| 368 |
A GCC upgrade on a system after installation from a stage3 tarball is a simple |
| 369 |
affair. One advantage users of new installations have is they do not have a |
| 370 |
plethora of software installed that links against the older version of GCC. |
| 371 |
The following example is for a GCC-3.3 to 3.4 or greater upgrade. Certain parts |
| 372 |
will be different if upgrading from other versions of GCC. For example, the |
| 373 |
library names used for <c>revdep-rebuild</c> below are GCC 3.3 specific, as |
| 374 |
well as the need to install <c>libstdc++-v3</c>. |
| 375 |
</p> |
| 376 |
|
| 377 |
<p> |
| 378 |
If a user has not made any customizations to their system yet, then there are |
| 379 |
very few steps to get their system upgraded to a new GCC version. As with the |
| 380 |
GCC-3.3 to 3.4 upgrade, the user has a couple options. However, unlike the |
| 381 |
GCC-3.3 to 3.4 upgrade, this one is less complicated as there are fewer |
| 382 |
differences between the methods. The <uri |
| 383 |
link="#first-install-revdep-rebuild">first method</uri> is faster and makes use |
| 384 |
of the <c>revdep-rebuild</c> tool from <c>gentoolkit</c>, similar to the above |
| 385 |
procedure. Using revdep-rebuild causes only packages which actually link |
| 386 |
against GCC libraries to be rebuilt, while the <uri |
| 387 |
link="#first-install-emerge-e">second method</uri> causes your entire new |
| 388 |
install to be recompiled with the new GCC version and takes much longer. This |
| 389 |
second method is never required and only documented for completeness. |
| 390 |
</p> |
| 391 |
|
| 392 |
<p> |
| 393 |
These first steps are common between both methods, and should be completed by |
| 394 |
everyone. |
| 395 |
</p> |
| 396 |
|
| 397 |
<pre caption="Upgrading GCC"> |
| 398 |
# <i>emerge -uav gcc</i> |
| 399 |
# <i>gcc-config i686-pc-linux-gnu-3.4.4</i> |
| 400 |
# <i>source /etc/profile</i> |
| 401 |
|
| 402 |
<comment>(Rebuilding libtool)</comment> |
| 403 |
# <i>emerge --oneshot -av libtool</i> |
| 404 |
</pre> |
| 405 |
|
| 406 |
<note> |
| 407 |
This assumes that you have <c>CHOST="i686-pc-linux-gnu"</c> set. If you are |
| 408 |
using another CHOST, please use the appropriate gcc-config line. |
| 409 |
</note> |
| 410 |
|
| 411 |
<p> |
| 412 |
To provide compatibility with older binary C++ applications, |
| 413 |
<c>sys-libs/libstdc++-v3</c> needs to be merged onto your system. |
| 414 |
</p> |
| 415 |
|
| 416 |
<pre caption="Installing libstdc++-v3"> |
| 417 |
# <i>emerge --oneshot sys-libs/libstdc++-v3</i> |
| 418 |
</pre> |
| 419 |
|
| 420 |
</body> |
| 421 |
</section> |
| 422 |
|
| 423 |
<section id="first-install-revdep-rebuild"> |
| 424 |
<title>Using revdep-rebuild</title> |
| 425 |
<body> |
| 426 |
|
| 427 |
<p> |
| 428 |
This method requires that you first install <c>gentoolkit</c> if you have not |
| 429 |
already done so. We will then run <c>revdep-rebuild</c> to actually scan the |
| 430 |
installed packages for ones we need to rebuild, then rebuild them. |
| 431 |
</p> |
| 432 |
|
| 433 |
<pre caption="Installing gentoolkit and running revdep-rebuild"> |
| 434 |
# <i>emerge -an gentoolkit</i> |
| 435 |
# <i>revdep-rebuild --library libstdc++.so.5 -- -p -v</i> |
| 436 |
# <i>revdep-rebuild --library libstdc++.so.5</i> |
| 437 |
</pre> |
| 438 |
|
| 439 |
<note> |
| 440 |
It is possible that you might have problems with non-existing package versions |
| 441 |
due to them being outdated or masked. If this is the case, you will want to use |
| 442 |
the <c>--package-names</c> option to <c>revdep-rebuild</c>. This causes packages |
| 443 |
to be recompiled based on the package name, rather than the exact name and |
| 444 |
version. |
| 445 |
</note> |
| 446 |
|
| 447 |
</body> |
| 448 |
</section> |
| 449 |
<section id="first-install-emerge-e"> |
| 450 |
<title>Using emerge -e</title> |
| 451 |
<body> |
| 452 |
|
| 453 |
<p> |
| 454 |
This method, while much slower, will rebuild the system target to ensure that |
| 455 |
everything has been rebuilt with your new compiler. This is not necessary, but |
| 456 |
is valid if you are also making changes to CFLAGS or other make.conf variables |
| 457 |
that will affect the system compile. |
| 458 |
</p> |
| 459 |
|
| 460 |
<pre caption="Upgrading GCC"> |
| 461 |
# <i>emerge -uav gcc</i> |
| 462 |
# <i>gcc-config i686-pc-linux-gnu-3.4.4</i> |
| 463 |
# <i>source /etc/profile</i> |
| 464 |
|
| 465 |
<comment>(Rebuilding libtool)</comment> |
| 466 |
# <i>emerge --oneshot -av libtool</i> |
| 467 |
</pre> |
| 468 |
|
| 469 |
<note> |
| 470 |
This assumes that you have <c>CHOST="i686-pc-linux-gnu"</c> set. If you are |
| 471 |
using another CHOST, please use the appropriate gcc-config line. |
| 472 |
</note> |
| 473 |
|
| 474 |
<p> |
| 475 |
To provide compatibility with older binary C++ applications, |
| 476 |
<c>sys-libs/libstdc++-v3</c> needs to be merged onto your system. |
| 477 |
</p> |
| 478 |
|
| 479 |
<pre caption="Installing libstdc++-v3"> |
| 480 |
# <i>emerge --oneshot sys-libs/libstdc++-v3</i> |
| 481 |
</pre> |
| 482 |
|
| 483 |
<p> |
| 484 |
Since we are performing these actions after an initial installation, we do not |
| 485 |
need to recompile the world target as we would when doing an upgrade on an |
| 486 |
already installed system. However, you may choose to perform a world update in |
| 487 |
place of the system update, to ensure that all packages are updated. |
| 488 |
</p> |
| 489 |
|
| 490 |
<pre caption="Rebuilding system"> |
| 491 |
# <i>emerge -e system</i> |
| 492 |
</pre> |
| 493 |
|
| 494 |
<p> |
| 495 |
It is also safe to remove older GCC versions at this time. Since this is an |
| 496 |
initial installation, we are using portage's prune feature to remove all older |
| 497 |
versions of GCC. |
| 498 |
</p> |
| 499 |
|
| 500 |
<pre caption="Cleaning up"> |
| 501 |
# <i>emerge -aP sys-devel/gcc</i> |
| 502 |
</pre> |
| 503 |
|
| 504 |
</body> |
| 505 |
</section> |
| 506 |
</chapter> |
| 507 |
</guide> |
Parent Directory
| 
Revision Log