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Linux From Scratch This Forum is for the discussion of LFS.
LFS is a project that provides you with the steps necessary to build your own custom Linux system.


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Old 01-28-2004, 01:01 PM   #1
Registered: Jan 2004
Location: Manchester
Distribution: slackware...
Posts: 344

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Windows, LFS and Slackware...

to install windows (say Win98) u need a computer with at least the required minimum requirements ie a 486 8mb ram and ... does that mean the bineries were compiled on a 486?

similarly if you install LFS say compiled on your athlon its optimized for your particular machine than using say slackware packages compiled for a 686?
Old 02-06-2004, 10:33 AM   #2
Registered: Jan 2004
Location: New Delhi, India
Distribution: L.F.S 5.0 | FreeBSD 5.2 | Debian sid | Gentoo 2004.0 | Slackware 9.1
Posts: 78

Rep: Reputation: 15
I think the meaning of this is related to compiler flags and optimisation. While compiling the binaries, you have the option to pass to the compiler the type of CPU and optimization levels. For example, you can pass the cpu type as athlon XP and enable certain CPU extensions. Same with P4. These are not enabled so that slower systems can also run the OS.
The people who build the binaries have to make sure that the binaries run on a 486 system also and that the OS should run on the minimum RAM mentioned. If you obtain the source code for windows and compile the OS with custom compiler flags, the system should run faster. But that doesnt mean that the OS wouldnt do any enhancements if it found a faster processor and lots of RAM. Runtime detection handles a lot of stuff. But you can avoid a runtime CPU detection by passing the CPU type to the compiler.
I run an LFS 5 system built on my Athlon XP and I can tell you I havent seen any operating system running faster than this. The programs run much faster than on other linux OSes. To fully optimize your LFS system, you should read more on compiling the base system with optimization flags. glibc and gcc can also be optimized to obtain faster performance.


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