111 lines
5.4 KiB
HTML
111 lines
5.4 KiB
HTML
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<title>Everest Linux - Docs</title>
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<a href="../about.html">About</a>
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<a href="https://git.everestlinux.org">Git ↗</a>
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<h2>Musl or Glibc?</h2>
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<p>Everest supports 2 different C libraries, musl and glibc. This guide should help you decide which to choose.</p>
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<h2>1 - musl</h2>
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<p><strong>1.1 </strong>Pros</p>
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<p>Musl is extremely lightweight and easy to build, compared to Glibc.</p>
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<p>As an added bonus, musl is also more secure than Glibc.</p>
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<p>Musl recieves the most support from the Everest development team.</p>
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<p><strong>1.2 </strong>Cons</p>
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<p>Musl may not support all programs, especially proprietary programs, or programs using Glibc-specific APIs.</p>
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<p><strong>1.3 </strong>Who should use musl</p>
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<p>Users running a server, doing simple web browsing, or using programs which do not depend on Glibc should use musl.</p>
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<p><strong>1.4 </strong>Who shouldn't use musl</p>
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<p>Users requiring proprietary software that cannot be patched and recompiled against musl, users who require nvidia graphics drivers, or those who use Steam.</p>
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<p>While compatibility layers, such as gcompat, can remedy these issues, there is no 100% perfect solution.</p>
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<p><strong>1.5 </strong>Solutions</p>
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<p>Those wishing to run musl, even with incompatible software and hardware, have a couple of solutions:</p>
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<p><i>1.5.1 </i>gcompat</p>
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<p>Gcompat is a shared object file that provides programs with Glibc APIs on a musl system. This can be used for running Glibc programs, but CANNOT be used for compiling them.</p>
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<p>Install gcompat by running the following:</p>
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<code>(root)# gpkg -f gcompat</code>
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<p><i>1.5.2 </i>Glibc chroot</p>
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<p>A minimal chroot containing Glibc can be set up very quickly.</p>
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<p>First, ensure you have the everest-devtools and everest-buildtools packages installed:</p>
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<code>(root)# gpkg -f everest-devtools everest-buildtools</code>
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<p>Next, create a directory for the chroot:</p>
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<code>(user)$ mkdir your-chroot</code>
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<p>Create a filesystem skeleton in the new directory:</p>
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<code>(user)$ mkskel -d your-chroot</code>
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<p>Install the necessary packages to the chroot:</p>
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<warnhead><strong>WARNING:</strong></warnhead>
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<div class="warning">
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<p>The following command costs a fair amount of disk space. Ensure you have enough free space before proceeding.</p>
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<p>Check disk space with the following command:</p>
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<code>(root)# df /</code>
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</div>
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<p><p>
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<code>(user)$ mkchroot-glibc -d your-chroot</code>
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<p>Finally, use everest-chroot to access the chroot:</p>
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<code>(root)# everest-chroot your-chroot</code>
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<p>Or, you can manually mount the required filesystems and run:</p>
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<code>(root)# chroot --userspec=0:0 your-chroot /bin/sh</code>
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<h2>2 - Glibc</h2>
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<p><strong>2.1 </strong>Pros</p>
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<p>Glibc is the de-facto standard C library in Linux, and as a result supports most programs, including proprietary ones.</p>
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<p><strong>2.2 </strong>Cons</p>
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<p>Glibc is very bloated and heavy on resources for what it does.</p>
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<p><strong>2.3 </strong>Who should use Glibc</p>
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<p>Users who wish to use proprietary programs, play Steam games, or have hardware that is incompatible with musl should use Glibc.</p>
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<p><strong>2.4 </strong>Who shouldn't use Glibc</p>
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<p>Users running an embedded, or otherwise resource-constrained system should not use Glibc.</p>
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<h2>3 - Migrating</h2>
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<p><strong>3.1 </strong>Prerequisites</p>
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<p>Changing the C library on an existing Everest system is known as migrating.</p>
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<warnhead><strong>WARNING:</strong></warnhead>
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<div class="warning">
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<p>Migration requires rebuilding most, if not all of the system. It may also present other issues. Continue at your own risk.</p>
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</div>
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<p><strong>3.2 </strong>Preparations</p>
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<p>First, change the system profile, corresponding to the C library you are switching to:</p>
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<code>(root)# glacier-mkprofile -u <i>SYSTEM_PROFILE</i></code>
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<p>Next, update the local package database:</p>
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<code>(root)# glacier-update-pkgdb</code>
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<p>Finally, change branches on / and pull in the new files:</p>
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<code>(user)$ cd /</code>
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<p></p>
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<code>(root)# git checkout <i>SYSTEM_PROFILE</i></code>
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<p></p>
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<code>(root)# git pull</code>
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<p></p>
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<warnhead><strong>WARNING</strong></warnhead>
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<div class="warning">
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<p>Pulling in a new root filesystem requires a substantial amount of time. Ensure your system continuously stays connected to the network and doesn't loose power.</p>
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<p>Your system may become corrupted if something interrupts this process.</p>
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</div>
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</div>
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<footer>
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<p>Page last updated 6/17/23 @ 20:16</p>
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<p>Page licensed under GNU Free Documentation License 1.3 or later</p>
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<p>--------------------</p>
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<p>Copyright (C) 2021-2023 Everest Linux</p>
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<p>Linux (R) is a registered trademark of Linus Torvalds.</p>
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<p>Everest Linux is provided AS IS, WITHOUT WARRANTY.</p>
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</footer>
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