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Diffstat (limited to 'prologue/architecture.xml')
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1 files changed, 17 insertions, 17 deletions
diff --git a/prologue/architecture.xml b/prologue/architecture.xml index f4b1a2744..aa8cb2399 100644 --- a/prologue/architecture.xml +++ b/prologue/architecture.xml @@ -10,22 +10,22 @@ <title>LFS Target Architectures</title> -<para>The primary target architecture of LFS is the 32-bit Intel CPU. If you +<para>The primary target architecture of LFS is the 32-bit Intel CPU. If you have not built an LFS system before, you should probably start with that -target. The 32-bit architecture is the most widely supported Linux system and +target. The 32-bit architecture is the most widely supported Linux system and is most compatible with both open source and proprietary software.</para> <para>On the other hand, the instructions in this book are known to work, with -some modifications, with both Power PC and 64-bit AMD/Intel CPUs. To build a -system that utilizes these CPUs, the main prerequisite in addition to those on -the next few pages, is an existing system such as an earlier LFS system, -Ubuntu, Red Hat/Fedora, SuSE, or other distribution that targets the system -that you have. Also note that a 32-bit system can be installed and used as a -host system on a 64-bit AMD/Intel system.</para> - -<para>Some other facts about a 64-bit systems need to be added here. When +some modifications, with both Power PC and 64-bit AMD/Intel CPUs. To build a +system that utilizes one of these CPUs, the main prerequisite, in addition to +those on the next few pages, is an existing Linux system such as an earlier LFS +installation, Ubuntu, Red Hat/Fedora, SuSE, or other distribution that targets +the architecture that you have. Also note that a 32-bit distribution can be +installed and used as a host system on a 64-bit AMD/Intel computer.</para> + +<para>Some other facts about a 64-bit systems need to be added here. When compared to a 32-bit system, the sizes of executable programs are slightly -larger and the execution speeds are only slightly faster. For example, in a +larger and the execution speeds are only slightly faster. For example, in a test build of LFS-6.5 on a Core2Duo CPU based system, the following statistics were measured:</para> @@ -39,16 +39,16 @@ minimal. Of course, if you have more than 4GB of RAM or want to manipulate data that exceeds 4GB, the advantages of a 64-bit system are substantial.</para> <para>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 building many applications twice, once for a 32-bit -system and once for a 64-bit system. Currently this is not directly supported -in the book, but is under consideration for a future release. In the meantime, +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. Currently this is not directly supported +in the book, but is under consideration for a future release. In the meantime, you can refer to the <ulink url="http://trac.cross-lfs.org/">Cross Linux From Scratch</ulink> project for this advanced topic.</para> -<para>There is one last comment about 64-bit systems. There are some packages +<para>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 +build instructions. Generally, these packages have some embedded 32-bit specific assembly language instructions that fail when building on a 64-bit system. Examples include the <ulink url="http://www.linuxfromscratch.org/blfs/view/svn/">Beyond Linux From Scratch |