On 28-06-2020 15:16, Pierre Labastie wrote:
On Sun, 2020-06-28 at 13:42 +0200, Frans de Boer wrote:
LS,
Currently, the previous chapter 5 has been split into 3 separate
chapters. It is obvious why the new chapter 7 exists.
However, chapter 5 and 6 are a bit puzzling. There are no extra
actions
between chapter 6 and 5, in fact one could argue that 5 and 6 can be
fussed together.
The only reason I can think of to explain the separation between
chapter
5 and 6, is that chapter 5 provides the basic building blocks to
compile
the remaining of chapter 6. Which can be reused if (some of) chapter
6
needs a rebuild. After all, the next step is a different
architecture
where this approach can be used.
That said, if the compiler or glibc is chanced, one has to rebuild
chapter 5 anyhow. Looking at the packages in chapter 6, there is
just
only 2x extra time involved to compile them. Especially when there is
no
testing done, as was possible under the previous releases.
Maybe one could explain this a little deeper?
Isn't "Toolchain technical notes" in "Important Preliminary Material"
enough? Well, maybe not. All we have is:
"As said above, the standard C++ library is compiled next, followed
in Chapter 6 by all the programs that need themselves to be built. The
install step of all those packages uses the DESTDIR variable to have
the programs land into the LFS filesystem."
Maybe better would be something like this:
"As said above, the standard C++ library is compiled next, which
completes the cross-compilation toolchain. Next, in Chapter 6, all the
programs that need themselves to be built. The install step of all
those packages uses the DESTDIR variable to have the programs land into
the LFS filesystem."
Also, in chapter six' introduction:
"This chapter shows how to cross-compile basic utilities using the just
built cross-toolchain".
Maybe add a sentence about impossibility for testing at the end of
"Those utilities are installed into their final location, but cannot be
used yet"
Pierre
So, if I read above reaction correctly, the only reason for having
chapter 6 is the use of the DESTDIR variable?
Sure, I understand that the tools build in chapter 5 are now used to
build programs/libraries which need to run on the target machine itself.
The whole set of chapter 6 and 7 can be copied to the target machine,
from where you can start building the final code with chapter 8 and
higher. This, however, needs some augmentation to the end of chapter 7
and start of chapter 8 or insert a new chapter 8 "Preparing the target
machine".
NOTE: this can help some users who's intended target machine is a 32-bit
x86 and their host machine is a x86_64. Just as a show case when
addressing none x86(_64) architectures in some future version.
Anyhow, the presented text make things - in my view - a little more
clear for the intended audience.
--- Frans.
--
A: Yes, just like that A: Ja, net zo
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