Whats the point of chapter 5?

David2010 · 07-21-2009, 04:13 PM

I am confused. What is the point of chapter 5 if there is chapter 6 doing the same thing but extended.

Or is there something I am missing here???

Can I just skip chapter 5 and proceed with chapter 6?

chigurh8 · 07-21-2009, 04:58 PM

From Chapter 5:

Quote:

This chapter shows how to build a minimal Linux system. This system will contain just enough tools to start constructing the final LFS system in Chapter 6 and allow a working environment with more user convenience than a minimum environment would.

From Chapter 5:

Quote:

The overall goal of Chapter 5 is to provide a temporary environment that can be chrooted into and from which can be produced a clean, trouble-free build of the target LFS system in Chapter 6. Along the way, we separate the new system from the host system as much as possible, and in doing so, build a self-contained and self-hosted toolchain. It should be noted that the build process has been designed to minimize the risks for new readers and provide maximum educational value at the same time.

From Chapter 6:

Quote:

In this chapter, we enter the building site and start constructing the LFS system in earnest. That is, we chroot into the temporary mini Linux system, make a few final preparations, and then begin installing the packages.

bsdunix · 07-22-2009, 03:57 PM

To put it simply, what you do in chapter 5 is a necessary building block to complete the LFS system.

Some of these packages are needed to resolve circular dependencies—for example, to compile a compiler, you need a compiler.
http://www.linuxfromscratch.org/lfs/...ter01/how.html

RaptorX · 07-23-2009, 02:50 PM

When you finish chapter 5 you have all the necessary components for building LFS in chapter 6 totally independent from your host system... look at it this way:

in chapter 5 you built bash 3.2 with the tools gcc, make, and others which are installed in your host system in /usr/bin or equivalent... but remember that you used ./configure --prefix=/tools right??

That means that when you chroot into /tools in chapter 6 when you issue bash, it will not open /usr/bin/bash in your host but in the mini linux that you created...

that way when you create your LFS you dont do it with the tools of your host but from your mini-linux that you created in chapter 5...

in short:

Quote:

Along the way, we separate the new system from the host system as much as possible, and in doing so, build a self-contained and self-hosted toolchain.

from chapter 6:

Quote:

From this point on, there is no need to use the LFS variable anymore, because all work will be restricted to the LFS file system. This is because the Bash shell is told that $LFS is now the root (/) directory.

let me add that bash will now look for all the executables in $LFS/tools/bin BY DEFAULT now.

That should be totally clear...

Ferpecto · 08-10-2009, 12:44 AM

You're building a system that will build the system. lol