MTD 248-645A Bedienungsanleitung PDF herunterladen (Seite 10)

Linux From Scratch - Version 7.0

The default 64-bit build that results from LFS is considered a "pure" 64-bit system. That is, it supports 64-bit

executables only. Building a "multi-lib" system requires compiling many applications twice, once for a 32-bit system

and once for a 64-bit system. This is not directly supported in LFS because it would interfere with the educational

objective of providing the instructions needed for a straightforward base Linux system. You can refer to the Cross

Linux From Scratch project for this advanced topic.

There is one last comment about 64-bit systems. There are some packages that cannot currently be built in a "pure" 64-

bit system or require specialized build instructions. Generally, these packages have some embedded 32-bit specific

assembly language instructions that fail when building on a 64-bit system. This includes some Xorg drivers from

Beyond Linux From Scratch (BLFS). Many of these problems can be worked around, but may require some specialized

procedures or patches.

LFS and Standards

The structure of LFS follows Linux standards as closely as possible. The primary standards are:

• POSIX.1-2008.

• Filesystem Hierarchy Standard (FHS)

• Linux Standard Base (LSB) Core Specification 4.0

The LSB has five separate standards: Core, C++, Desktop, Runtime Languages, and Printing. In addition

to generic requirements there are also architecture specific requirements. LFS attempts to conform to the

architectures discussed in the previous section.

Note

Many people do not agree with the requirements of the LSB. The main purpose of defining it is to

ensure that proprietary software will be able to be installed and run properly on a compliant system.

Since LFS is source based, the user has complete control over what packages are desired and many

choose not to install some packages that are specified by the LSB.

Creating a complete LFS system capable of passing the LSB certifications tests is possible, but not without many

additional packages that are beyond the scope of LFS. Most of these additional packages have installation instructions

in BLFS.

Packages supplied by LFS needed to satisfy the LSB Requirements

LSB Core: Bash, Binutils, Coreutils, Diffutils, File, Findutils, Gawk, Grep, Gzip, M4, Man-

DB, Ncurses, Procps, Psmisc, Sed, Shadow, Tar, Util-linux, Zlib

LSB C++: Gcc

LSB Desktop: None

LSB Runtime Languages: Perl

LSB Printing: None

LSB Multimeda: None

Packages supplied by BLFS needed to satisfy the LSB Requirements

LSB Core: Bc, Cpio, Ed, Fcrontab, Initd-tools, PAM, Sendmail (or Postfix or Exim)

LSB C++: None

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MTD 248-645A Bedienungsanleitung Seite 10