diff --git a/chapter02/hostreqs.xml b/chapter02/hostreqs.xml
index 022e5d749..5be5d61ac 100644
--- a/chapter02/hostreqs.xml
+++ b/chapter02/hostreqs.xml
@@ -10,6 +10,21 @@
Host System Requirements
+
+ Hardware
+
+ The LFS editors recommend that the system CPU have at least
+ four cores and that the system have at least 8 GB of memory.
+ Older systems that do not meet these requirements will still work,
+ but the time to build packages will be significantly longer
+ than documented.
+
+
+
+
+
+ Software
+
Your host system should have the following software with the
minimum versions indicated. This should not be an issue for most
modern Linux distributions. Also note that many distributions will
@@ -245,4 +260,5 @@ or all absent, but not only one or two present.
so an upgrade of your host system kernel is required.
+
diff --git a/chapter04/aboutsbus.xml b/chapter04/aboutsbus.xml
index 82934d851..f88db24f6 100644
--- a/chapter04/aboutsbus.xml
+++ b/chapter04/aboutsbus.xml
@@ -13,17 +13,17 @@
Many people would like to know beforehand approximately how long
it takes to compile and install each package. Because Linux From
Scratch can be built on many different systems, it is impossible to
- provide absolute time estimates. The biggest package (Glibc) will
- take approximately 20 minutes on the fastest systems, but could take
- up to three days on slower systems! Instead of providing actual times,
+ provide absolute time estimates. The biggest package (gcc) will
+ take approximately 5 minutes on the fastest systems, but could take
+ days on slower systems! Instead of providing actual times,
the Standard Build Unit (SBU) measure will be
used instead.
- The SBU measure works as follows. The first package to be compiled
- is binutils in . The
- time it takes to compile this package is what we will refer to as the
- Standard Build Unit or SBU. All other compile times will be expressed in
- terms of this unit of time.
+ The SBU measure works as follows. The first package to be compiled is
+ binutils in . The time it takes to
+ compile using one core is what we will refer to as the Standard
+ Build Unit or SBU. All other compile times will be expressed in terms of this
+ unit of time.
For example, consider a package whose compilation time is 4.5
SBUs. This means that if your system took 10 minutes to compile and
@@ -55,6 +55,11 @@
be more difficult because the lines from different processes will be
interleaved. If you run into a problem with a build step, revert to a
single processor build to properly analyze the error messages.
+
+ The times presented here are based upon using four cores (-j4). The
+ times in Chapter 8 also include the time to run the regression tests for
+ the package unless specified otherwise.
+
diff --git a/chapter08/introduction.xml b/chapter08/introduction.xml
index f80ccc0c1..93d4bd68d 100644
--- a/chapter08/introduction.xml
+++ b/chapter08/introduction.xml
@@ -52,8 +52,8 @@
The SBU values and required disk space include test suite data
for all applicable packages in . SBU
- values have been calculated using a single CPU core (-j1) for all
- operations.
+ values have been calculated using four CPU cores (-j4) for all
+ operations unless specified otherwise.
About Libraries
diff --git a/packages.ent b/packages.ent
index 9279b0483..45551e1e6 100644
--- a/packages.ent
+++ b/packages.ent
@@ -19,7 +19,7 @@
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