gronod/lfs
1
0
Fork 0
mirror of https://git.linuxfromscratch.org/lfs.git synced 2025-07-21 03:35:20 +01:00
Code Issues Packages Projects Releases Wiki Activity

mips64el: start the branch

Browse Source
This commit is contained in:
Xi Ruoyao 2024-01-03 13:39:21 +08:00
parent d91a836a78
commit e43d96fa2f
No known key found for this signature in database
GPG Key ID: ACAAD20E19E710E3
2 changed files with 18 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
git-version.sh
View File

@ -53,8 +53,8 @@ full_date="$month $day$suffix, $year"
sha="$(git describe --abbrev=1)" sha="$(git describe --abbrev=1)"
rev=$(echo "$sha" | sed 's/-g[^-]*$//') rev=$(echo "$sha" | sed 's/-g[^-]*$//')
version="$rev" version="mips64el-$rev"
versiond="$rev-systemd" versiond="mips64el-$rev-systemd"
if [ "$(git diff HEAD | wc -l)" != "0" ]; then if [ "$(git diff HEAD | wc -l)" != "0" ]; then
version="$version-wip" version="$version-wip"

42
prologue/architecture.xml
View File

@ -10,41 +10,31 @@
<title>LFS Target Architectures</title> <title>LFS Target Architectures</title>
<para>The primary target architectures of LFS are the AMD/Intel x86 (32-bit) <para>The primary target architectures of this LFS edition are the little
and x86_64 (64-bit) CPUs. On the other hand, the instructions in this book are endian MIPS64 release 2 to 5 CPUs (the release 6 is not backward-compatible
also known to work, with some modifications, with the Power PC and ARM CPUs. To with earlier releases). On the other hand, the instructions
in this book are also known to work, with some modifications, for
MIPS CPUs with a different byte order, word size, or ISA version. To
build a system that utilizes one of these alternative CPUs, the main prerequisite, in build a system that utilizes one of these alternative CPUs, the main prerequisite, in
addition to those on the next page, is an existing Linux system such as an addition to those on the next page, is an existing Linux system such as an
earlier LFS installation, Ubuntu, Red Hat/Fedora, SuSE, or some other distribution earlier LFS installation, Ubuntu, Red Hat/Fedora, SuSE, or some other distribution
that targets that architecture. (Note that a 32-bit that targets that architecture.</para>
distribution can be installed and used as a host system on a 64-bit AMD/Intel
computer.)</para>
<para>The gain from building on a 64-bit system, as <para>There are three widely-used ABIs for 64-bit MIPS programs.
compared to a 32-bit system, is minimal. The <quote>o32</quote> ABI is compatible with the ABI of the legacy 32-bit
For example, in a test build of LFS-9.1 on a Core i7-4790 CPU based system, MIPS programs and it's used for running those legacy 32-bit programs on a
using 4 cores, the following statistics were measured:</para> 64-bit MIPS CPU. The <quote>n64</quote> ABI is designed for taking the full
advantage of 64-bit capability. The <quote>n32</quote> ABI is similar to
<screen><computeroutput>Architecture Build Time Build Size n64 but using 32-bit pointers, mainly used for 64-bit devices with a small
32-bit 239.9 minutes 3.6 GB amount of RAM. The default 64-bit build that results from LFS is a
64-bit 233.2 minutes 4.4 GB</computeroutput></screen> <quote>pure</quote> n64 system. That is, it supports n64 executables
<para>As you can see, on the same hardware, the 64-bit build is only 3% faster
(and 22% larger) than the 32-bit build. If you plan to use LFS as a LAMP
server, or a firewall, a 32-bit CPU may be good enough. On the other
hand, several packages in BLFS now need more than 4 GB of RAM to be built
and/or to run; if you plan to use LFS as a desktop, the LFS authors
recommend building a 64-bit system.</para>
<para>The default 64-bit build that results from LFS is a
<quote>pure</quote> 64-bit system. That is, it supports 64-bit executables
only. Building a <quote>multi-lib</quote> system requires compiling many only. Building a <quote>multi-lib</quote> system requires compiling many
applications twice, once for a 32-bit system and once for a 64-bit system. applications multiple times, each time for an ABI to be supported.
This is not directly supported in LFS because it would interfere with the This is not directly supported in LFS because it would interfere with the
educational objective of providing the minimal instructions needed for a educational objective of providing the minimal instructions needed for a
basic Linux system. Some of the LFS/BLFS editors maintain a multilib fork basic Linux system. Some of the LFS/BLFS editors maintain a multilib fork
of LFS, accessible at <ulink of LFS, accessible at <ulink
url="https://www.linuxfromscratch.org/~thomas/multilib/index.html"/>. But url="https://www.linuxfromscratch.org/~thomas/multilib/index.html"/>. But
that's an advanced topic.</para> it's for x86_64, and anyway multilib is an advanced topic.</para>
</sect1> </sect1>